ASCO Daily News
The ASCO Daily News podcast features engaging discussions with leading oncologists on timely topics in oncology, hosted by Dr. John Sweetenham.
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Advances in Adjuvant Therapy for High-Risk Early Breast Cancer With Germline Mutations
01/30/2025
Advances in Adjuvant Therapy for High-Risk Early Breast Cancer With Germline Mutations
Dr. Jasmine Sukumar and Dr. Dionisia Quiroga discuss advances in adjuvant therapy for patients with early breast cancer and BRCA1/2 mutations, including how to identify patients who should receive genetic testing and the significant survival benefits of olaparib that emerged from the OlympiA trial. TRANSCRIPT Dr. Jasmine Sukumar: Hello, I'm Dr. Jasmine Sukumar, your guest host of the ASCO Daily News Podcast today. I'm an assistant professor and breast medical oncologist at the University of Texas MD Anderson Cancer Center. On today's episode, we'll be exploring advances in adjuvant therapy for high-risk early breast cancer in people with BRCA1/2 germline mutations. Joining me for this discussion is Dr. Dionisa Quiroga, an assistant professor and breast medical oncologist at the Ohio State University Comprehensive Cancer Center. Our full disclosures are available in the transcript of this episode. Dr. Quiroga, it's great to have you on the podcast. Thanks for being here. Dr. Dionisia Quiroga: Thank you. Looking forward to discussing this important topic. Dr. Jasmine Sukumar: Let's start by going over who should be tested for BRCA1/2 genetic mutations. How do you identify patients with breast cancer in your clinic who should be offered BRCA1/2 genetic testing? Dr. Dionisia Quiroga: So, guidelines on who to offer testing to somewhat differ between organizations at this point. I would say, generally, I do follow our current , though. Those guidelines recommend that BRCA1/2 mutation testing be offered to all patients who are diagnosed with breast cancer and are 65 years old or younger. For those that are older than 65 years old, there are additional factors to really take into account to decide on who to recommend testing for. Some of this has to do with personal and family history as well as ancestry. The NCCN also has their own specific guidelines for who to offer testing to. For example, people assigned male at birth; those who are found to have a second breast primary; those who are diagnosed at a young age; and those with significant family history should also be offered BRCA1/2 testing. I think, very important for our discussion today, ASCO and SSO also made a very important point that all patients who may be eligible for PARP inhibitor therapy should be offered testing. So clearly this includes a large amount of our patient population. In my practice, we often refer to our Cancer Genetics Program. We're fortunate to have many experienced genetic counselors who can complete pre-test and post-test counseling with our patients. However, in settings where this may not be accessible to patients, it can also be appropriate for oncology providers to order the testing and ideally perform some of this counseling as well. Dr. Jasmine Sukumar: Thank you Dr. Quiroga. Let's next review where we are in current clinical practice guidelines. What current options do we have for adjuvant therapy specific to people with high-risk early breast cancer and BRCA1/2 genetic mutations? Dr. Dionisia Quiroga: Our current guidelines recommend adjuvant olaparib for one year for individuals with HER2-negative high risk breast cancer. This approval largely came from the data and the results of the trial. This was a prospective phase 3, double blind, randomized clinical trial. It enrolled patients who had been diagnosed with HER2-negative early-stage breast cancer who also carried germline pathogenic or likely pathogenic variants of either the BRCA1 and/or BRCA2 genes. The disease also had to be considered high-risk and there were several criteria that had to be evaluated to deem whether or not these patients were high-risk. For example, those who are treated with neoadjuvant chemotherapy, if they had disease that was triple-negative, they needed to have some level of invasive residual disease at time of surgery. Alternatively, if the disease was hormone receptor-positive, they needed to have residual disease and a calculated CPS + EG score of 3 or higher. This scoring system is something that estimates relapse probability on the basis of clinical and pathologic stage, ER status, and histologic grade, and this will give you a score ranging from 0 to 6. In general, the higher the score, the worse the prognosis. This though is available to the public online to allow providers to calculate this risk. For the subset of patients who received adjuvant chemotherapy, for them to qualify for the trial, if they had triple-negative disease, they needed to have a tumor of at least 2 cm or greater and/or have positive lymph nodes for disease. For hormone receptor-positive disease that was treated with adjuvant chemotherapy, they were required to have four or more pathologically confirmed positive lymph nodes at time of surgery. From this specified pool, patients were then randomized 1:1 to get either adjuvant olaparib starting at 300 mg twice a day or a matching placebo twice a day after they had completed surgery, chemotherapy and radiation treatment if needed. Dr. Jasmine Sukumar: And what were the outcomes of this study? Dr. Dionisia Quiroga: The study ended up enrolling over 1,800 patients and from these 1,800 patients, 70% had a BRCA1 mutation while 30% had a BRCA2 mutation. About 80% of the patients had triple-negative disease compared to hormone receptor-positive disease. Interestingly, about half of all patients enrolled had received neoadjuvant chemotherapy while the other half received adjuvant chemotherapy. Looking at the outcomes, this was overall a very positive study. We actually now have outcomes data from a median of about 6 years out. This was just reported in December at the 2024 San Antonio Breast Cancer Symposium. There was found to be a 9.4% absolute difference in six-year invasive disease-free survival favoring the olaparib arm over the placebo arm. What was also interesting is that this was consistent across multiple subgroups of patients and the benefit was really seen whether or not they had hormone receptor-positive or triple-negative disease. The absolute difference in distant disease-free survival was also high at 7.8% and additionally favored olaparib. Most importantly, there was found to be a significant overall survival benefit. The six-year overall survival was 87.5% in the olaparib group compared to 83.2% in the placebo group. This translates to about a 4.4% difference and a relative 28% overall survival benefit in using olaparib. Now, future follow up is going to be very important. Follow up for this study is actually planned to continue out until June 2029 so we can continue to observe if these survival curves will continue to branch apart as they have so far at each follow up. And I think this is especially important for those patients diagnosed with hormone receptor-positive cancers because we know those patients are at particular risk for later recurrences. As an additional side note, the researchers also noted that there were fewer primary malignancies in the olaparib group, not just of the breast but also primary ovarian or fallopian tube cancers as well, which is not completely surprising knowing that this drug is also heavily used and beneficial in different types of gynecologic cancers. Ultimately, the amount of adverse events reported have been low with only about 9.9% of patients receiving olaparib needing to discontinue drug due to adverse events, and this is compared to 4.2% reported in the placebo group. Dr. Jasmine Sukumar: You mentioned that the trial showed an overall survival benefit, but interestingly the trial looking at olaparib versus chemotherapy in patients with advanced metastatic HER2-negative breast cancer did not show a significant overall survival benefit. Could you discuss those differences? Dr. Dionisia Quiroga: I agree, that's a very good point. So comparator arm was, of course, a placebo. So while this isn't the same as comparing to chemotherapy, it does still potentially suggest that there is a degree of benefit that olaparib can provide when it's introduced in the early local disease setting compared to advanced metastatic disease. I think we need more future trials looking at potential other combinations to see if we can improve the efficacy of PARP inhibitors in the metastatic setting. Dr. Jasmine Sukumar: For patients who do choose to proceed with use of adjuvant olaparib due to the promising efficacy, what side effects should oncologists counsel their patients about? Dr. Dionisia Quiroga: The most common notable side effects, I would say with olaparib and other PARP inhibitors are really cytopenias. Gastrointestinal side effects such as nausea and vomiting can occur as well as fatigue. There are some less common but potentially more serious side effects that we should counsel our patients on. This includes pneumonitis. So counseling patients on if they're short of breath or experiencing cough to let their provider know. Venous thromboembolism can also be increased rates of occurrence. And then of course myelodysplastic syndromes or acute myeloid leukemia is something that we often are concerned about. That being said, I think it should be noted that interestingly in the trial so far, there have been less new cases of MDS and AML in the olaparib group than actually what's been reported in the placebo group at this median follow up of over six years out. So we'll need to continue to monitor this endpoint over time, but I do think this provides some reassurance. Dr. Jasmine Sukumar: Since the initiation of the trial, other adjuvant treatments have also been studied and FDA approved for non-metastatic HER2-negative breast cancer. So for example, the trial established adjuvant capecitabine as an FDA approved treatment option in patients with triple-negative breast cancer who had residual disease following neoadjuvant chemotherapy. So if a patient with triple-negative breast cancer with residual disease is eligible for both adjuvant olaparib and adjuvant capecitabine treatments, how do you decide amongst the two? Dr. Dionisia Quiroga: If a patient's eligible for both, I honestly often favor olaparib, and I do this because I find the data for adjuvant olaparib a little bit more compelling. There are also differences in toxicity profile and treatment duration between the two that I think we should discuss with patients. For example, olaparib is supposed to be taken for a year total, whereas with capecitabine we typically treat for six to eight cycles with each cycle taking three weeks. There are some who may also sequence the two drugs in very high-risk disease. However, this is very much a data free zone. We don't have any current clinical trials really comparing these two or if sequencing of these agents is appropriate. So I don't currently do this in my own clinical practice. Dr. Jasmine Sukumar: Nowadays, almost all patients with stage 2 to 3 triple-negative breast cancer will be offered neoadjuvant chemotherapy plus immune checkpoint inhibitor therapy pembrolizumab per our trial data. With our current approach, pembrolizumab is continued into the adjuvant setting regardless of surgical outcome, so that patients receive a year total of immunotherapy. So in patients with residual disease and a BRCA germline mutation, do you suggest using adjuvant olaparib concurrently with pembrolizumab? Do we have any data to support that approach? Dr. Dionisia Quiroga: I do. I do use them concurrently. If a patient is eligible for adjuvant olaparib, I would use it the same way as if they were not on pembrolizumab. That being said, there are no large studies currently that have shown what the benefit or the toxicity of pembrolizumab plus olaparib are for early-stage disease. However, we do have some safety data of this combinatorial approach from other studies. For example, the phase 2/3 study showed that patients with advanced metastatic triple-negative breast cancer who were receiving concurrent pembrolizumab and olaparib had a manageable safety profile, particularly as the toxicities of these drugs alone don't tend to overlap. Dr. Jasmine Sukumar: And what about endocrine therapy for those that also have hormone receptor-positive disease? Dr. Dionisia Quiroga: Adjuvant endocrine therapy should definitely be continued while patients are on olaparib if they're hormone receptor-positive. An important component of this will also likely be ovarian suppression, which should include recommendation of risk reducing bilateral salpingo oophorectomy due to the risk of ovarian cancer development in patients who carry BRCA1/2 gene mutations. In most cases, this should happen at age 40 or before for those that carry a BRCA1 mutation, and at age 45 or prior for those with BRCA2 mutations. Dr. Jasmine Sukumar: And do you also consider adjuvant bisphosphonates in this context? Dr. Dionisia Quiroga: Yes. Like adjuvant endocrine therapy, adjuvant bisphosphonates were also instructed to be given according to standard guidelines in the trial, so I would recommend use of bisphosphonates when indicated. You can refer to the to guide that decision in order to utilize this due to multiple clinical benefits. It doesn't just help in terms of adjuvant breast cancer treatment but also reduction of fracture rate and down the line, improved breast cancer mortality. Dr. Jasmine Sukumar: Particularly in hormone receptor-positive breast cancer, another adjuvant therapy option that was not available when the trial started are the CDK4/6 inhibitors, ribociclib and abemaciclib, based on the and studies. So how do you consider the use of these adjuvant therapy drugs in the context of olaparib and BRCA mutations? Dr. Dionisia Quiroga: Yeah, so we are definitely in a data-free zone here. And that's in part because the and the studies are still ongoing and reporting data out at the same time that we're getting updated data. So unlike some of our other adjuvant treatments that we discussed, where olaparib could be safely given concurrently, the risk of myelosuppression and using both a CDK4/6 inhibitor and a PARP inhibitor at the same time would be too high. In some cases, even if a patient has a BRCA1/2 mutation, they may not meet that specified inclusion criteria that set for what they consider to be high-risk disease. And we know from the and the trial there are also different markers that they use to denote high-risk disease. So it's possible, for example, in the NATALEE trial that looks specifically at adjuvant ribociclib, they included a much larger pool of hormone receptor-positive early-stage breast cancers, including a subset that did not have positive axillary lymph nodes. In cases where patients would qualify for both olaparib and a CDK4/6 inhibitor, I think this is worth a nuanced discussion with our patients about the potential benefits, risks and administration of these drugs. I think another point to bring up is the cost associated with these drugs and the length of time patients will be on for, because financial toxicity is always something that we should bring up with patients as well. When sequencing these in high-risk disease, my practice is to generally favor olaparib first due to the overall survival data. There is also some data to support that patients with BRCA1/2 germline mutations may not respond quite as well to CDK4/6 inhibitors compared to those without. But again, this is still outside of the purview of current guidelines. Fortunately, we have more potential choices for patients, and that's a good thing, but shared decision making also needs to be key. Dr. Jasmine Sukumar: And while our focus today is on adjuvant treatment for people who carry germline BRCA mutations, what about other related gene mutations such as PALB2 pathogenic variant? Dr. Dionisia Quiroga: That's a great question. Clinical trials in the advanced metastatic setting have shown that there is efficacy of olaparib in the setting for PALB2 mutations. This is largely based on the phase 2 trial and that provided a Category 2B NCCN recommendation for patients with these PALB2 gene mutations. However, we're really still lacking enough clinical data for use in early-stage disease, so I don't currently use adjuvant olaparib in this case. I am definitely eager for more data in this area as the efficacy of PARP inhibitors in PALB2 gene mutations is very compelling. I think also, in the same line, there's been some data for somatic BRCA1/2 mutations in the metastatic setting, but we still have a lack of data for the early stage setting here as well. Dr. Jasmine Sukumar: Thank you Dr. Quiroga, for sharing your valuable insights with us today on the ASCO Daily News Podcast. Dr. Dionisia Quiroga: Thank you, Dr. Sukumar. Dr. Jasmine Sukumar: And thank you to our listeners for your time today. You'll find links to the studies discussed today in the transcript of this episode. Finally, if you value the insights that you hear on the ASCO Daily News Podcast, please take a moment to rate, review and subscribe wherever you get your podcasts. Thank you. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. Follow today’s speakers: @ Follow ASCO on social media: Disclosures: Dr. Dionisia Quiroga: No relationships to disclose Dr. Jasmine Sukumar: Honoraria: Sanofi (Immediate Family Member)
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How to Advance Cancer Care for Native Americans
01/09/2025
How to Advance Cancer Care for Native Americans
Native American oncologist Dr. Amanda Bruegl and Dr. Noelle LoConte discuss culturally tailored interventions and the importance of community engagement to advance cancer prevention, diagnosis, and treatment for Native communities. TRANSCRIPT ASCO Daily News: Hello and welcome to the ASCO Daily News Podcast. I'm Geraldine Carroll, a reporter for the ASCO Daily News. On today's episode, we'll be discussing cancer care for Native American communities who face unique challenges and disparities in accessing and receiving cancer care. I'm delighted to be joined by two oncologists who will be sharing their insights on ways to advance cancer prevention, diagnosis, and treatment through culturally tailored interventions and community-based programs for high-risk Native Americans whose issues are chronically overlooked in the healthcare system, according to experts. Dr. Amanda Bruegl is an associate professor of obstetrics and gynecology at the Oregon Health and Science University School of Medicine. She is a gynecologic oncologist at the OHSU Knight Cancer Institute and a citizen of the Oneida Nation and descendant of Stockbridge-Munsee. Dr. Noelle LoConte is an associate professor of medicine at the University of Wisconsin Madison Carbone Cancer Center where she also serves as a GI medical oncologist, geriatrician and leads community outreach. Full disclosures are available in the transcript of this episode. Dr. LoConte and Dr. Bruegl, it's great to have you on the podcast today. Dr. Noelle LoConte: Thanks so much for having me. Dr. Amanda Bruegl: Thank you for having us. ASCO Daily News: Dr. Bruegl, I'd like to start by asking you to tell us a bit about your background and how it has influenced your career and interests as a gynecologic oncologist. Dr. Amanda Bruegl: I grew up in Wisconsin and I have a Native parent and a non-Native parent. And so having an awareness of both cultural influences in my life has really shaped my interest in cancer prevention. Seeing the high rates of preventable death in cancer among Native populations in gynecologic cancers, in particular, has really driven me to dedicate my research career toward decreasing the morbidity and mortality of cervical cancer among Native women. ASCO Daily News: Well, can you tell us about your work in cancer prevention, specifically cervical cancer? The data shows that Native Americans in Oregon get cervical cancer one and a half times more than the general state population and die from it two times more often. What are the factors, the barriers, that are contributing to these high rates of cervical cancer? Dr. Amanda Bruegl: The data in Oregon is actually not just limited to Oregon. Our group did some work in collaboration with the , and we found that, as you stated, . And that's true for the Pacific Northwest. And if you dig deeper into the literature, you see that these rates are true across Indian Country, sometimes worse. When we looked at the age groups, we found that older women had three times the rate of mortality. So looking at like 45 to 65. As I was looking through the literature to figure out, well, why is this, we found that there are very, very few funded studies that even look at this. We have a known persistent disparity that is chronically understudied and underfunded. And so I'm trying to do work in this arena to explore this further. A follow up that we did was looking at whether we are using the prevention tools. So it's common across the United States that we have two very powerful prevention tools. So participation in cervical cancer screening doesn't necessarily prevent cervical cancer, but you can have early detection of pre-invasive disease or detection of early-stage disease, which is highly curable. And then we also have HPV vaccination, something geared towards the youth in our communities across the U.S. HPV vaccination starting at age 9 with a goal of complete vaccination by the age of 12. So we looked at: Are we using these two tools in Indian Country? And what we found was that participation in cervical cancer screening, looking at who is up-to- date among Natives, and we found that overall the population had about 60% rates of up-to- date on cervical cancer screening compared to general US rates, which are in like the high 70s or low 80s. And then when we looked at that age group that has higher rates of mortality, we actually found that there's only about a 50% rate of up-to-date screening. So we know in one arena people aren't participating in screening. And there's a variety of different contributors to that. There's access to care. How far do you have to travel to get to a provider who will provide cervical cancer screening? Among Native women, there's an over 50% rate of history of sexual trauma, sexual violence, pelvic exam trauma. It's a huge barrier to coming in for this very sensitive exam. There is also mistrust with the medical system in general. There's high turnover of providers at Indian Health Service Clinics. The clinic that I'm currently working at now, so I do outreach at a clinic one day a month and I'm the longest standing doc at that clinic and I'm a consultant who comes one day a month. I've been there since 2016. And so when you can't develop a relationship with a provider and develop trust and there's just this churn of new people every three to six months, developing a relationship to allow someone to feel comfortable with a very personal and private examination can be a huge barrier. On the HPV vaccination side, we found that the numbers for HPV vaccination were pretty optimistic. So the numbers have been going up since our study period started in 2015. The clinics in the Pacific Northwest that are serving Native populations are doing a great job with education, outreach and increasing the numbers. The group with the greatest rates of HPV vaccination are for people assigned female at birth in the 13-18 age group. They are the only group that is approaching the . But there's still work to be done in this arena. Those are some big drivers of why this persistent disparity continues. ASCO Daily News: Absolutely. You mentioned some very serious barriers. Sexual trauma, mistrust, long distance to travel to clinics. Looking ahead, can you tell us about potential screening tools that could improve screening? And I also wanted to ask you about innovations you're excited about that could be potentially incorporated into practice to increase the ability and comfort of your patients to screening and access to HPV vaccination. Dr. Amanda Bruegl: So, in terms of cervical cancer screening and how to increase the rates, there are a number of different things in the literature broadly across populations that really show that knowledge and awareness of cervical cancer and cervical cancer screening guidelines is associated with guideline concordant care. And so ensuring that our patients in our communities know and understand what the recommendations are is very important. Efforts to provide education to women in the community, community stakeholders, and culturally tailored content can all be important for increasing the rates of cervical cancer participation. Another thing that has the potential to really help improve screening rates is HPV self-collection. The FDA just recently approved HPV self-collection which can help empower an individual to do their own testing on their own body and not have someone else place a speculum in a private personal area where they're not comfortable. Some of the tribes in our region are starting to adopt this practice. And I just gave a talk to the regional Indian Health Service medical directors and have had really positive feedback about clinics working towards bringing this into their practice. I hope that the FDA can move forward with allowing patients to do this in the comfort of their own home. Sadly, the FDA in their evaluations decided it had to be a clinic administered test. So someone still has to go through the barrier of finding time to, if they have caregiver responsibilities or work, to have these responsibilities taken care of for someone else so they can drive to a clinic. So these barriers of transportation and caregiving are not addressed by this. It addresses some of the trauma, that barrier. And so I think in the US, we can do better about bringing this like FIT testing to our patients. I really hope and challenge our country to move forward with that a bit more. Geraldine Carroll: Thanks, Dr. Bruegl. I'll come back to you in a moment, but first I'd like to switch gears and address some of the challenges faced by Native communities in Wisconsin that were featured in a fascinating presented by our guest, Dr. Noelle LoConte, at the recent ASCO Quality Care Symposium. The study found that radon levels in Native lands in Wisconsin were much higher than anticipated and may explain higher rates of lung cancer among Native communities in the state. Radon is the second leading cause of lung cancer in the U.S. So, Dr. LoConte, can you tell us more about this and your incredible partnership with the in this work? Dr. Noelle LoConte: You bet. Thanks for the interest. First of all, I think it's just an incredible privilege to work with all of these communities. So, I wanted to say at the jump that this was a joint project led by the cancer center that I'm affiliated with, but also with the Stockbridge-Munsee community. They approved the project and they designed it with us, and they retain ownership of the data. Data sovereignty is an important issue when you're doing this work. But we came to them wanting to work on something around cancer. I actually thought maybe colorectal cancer screening. But in meeting with the health center and the tribal community members, it became clear that they were more concerned that they had intergenerational rates of cancer, and they felt that they were being poisoned by their land. And that brought me to the state Environmental Health Program. And we looked at some data and realized, one, their lung cancer rates were quite high, but two, their radon testing rates were quite low. And that that was a place where we thought we couldn't make some forward momentum. So, we designed a program to educate around radon and radon testing and mitigation and then tested all the homes on the reservation. And we successfully tested all homes for radon and then successfully mitigated all the homes that tested over four picocuries per liter, which is the recommended level at which you should mitigate per the EPA, the Environmental Protection Agency. The statewide average for Wisconsin is 10% positive. And amongst homes that had a basement, which is thought to be the highest risk kind of dwelling in the Stockbridge-Munsee Reservation community, the positive rate was 77%. And when you take all the homes together because we had some homes with crawl spaces or slab foundation, it was around, I believe, 55% positive, so much higher than 10%. ASCO Daily News: Well, that data is just striking. Your study certainly illustrates the vital role that cancer centers can play in mitigating structural determinants of health among Native communities, such as with housing quality. Do you think this will inspire a similar approach in other regions of the country? Dr. Noelle LoConte: Yeah, I think this work was possible because of philanthropy. It is very, very hard to get grant funding for mitigation, in particular. Mitigation is usually done once in the life of the dwelling, but it is very, very expensive. A cheap mitigation is $750, and many are many thousands of dollars especially when you're looking at very rural communities where there's not really a mitigator within hundreds of miles and you have to really negotiate to get somebody to come out there. Every cancer center that's designated by the National Cancer Institute has to have a community outreach and engagement unit or program. I would argue that rather than us generating reports describing disparities, that this kind of work to actually dismantle these determinants of health and move power back into the community is an ideal role for a cancer center. But the funding was definitely a tricky piece of it. And I would hope that we could either envision funding mechanisms that allow for this kind of direct service to communities, or we can continue to work with philanthropic agencies to fund this. ASCO Daily News: Well, looking through a wider lens at the experience of Native communities navigating cancer care, I'd like to ask each of you to comment on how you think the oncology community can better support and serve high-risk Native populations. What message would you like oncologists to take away from this discussion today? Dr. Bruegl, would you like to respond first? Dr. Amanda Bruegl: There's so many layers to needs in our communities. First and foremost, it's important to understand that American Indians and Alaska Natives are sovereign people, sovereign nations. We've been written into the US Constitution as citizens of our own tribes. And it's important to remember that when working with our populations. I think it's also really important to remember that there's treaty law that promised healthcare to our communities. And you see that we are underfunded in all aspects of healthcare, and it's a driver. And people on the healthcare side of things need to remember we represent the failures of the healthcare system to care for our Native communities. Whether or not you wake up in the morning with a goal to help, you have to remember that you represent the institution and the history of this country and are going to be asked to prove yourself in a genuine fashion. And that takes time. I think for people who are in research, it's really important to think about how do you engage and partner with tribal communities so that we're not chronically left behind and left out of study? We seldom show up in the data, and we have to find our own data. Tribal epidemiology centers have been really paramount in helping tribes get access to their data and analyze their data. But you can see in trial after trial after trial, we're sort of shoved into the other box. And so it's so difficult to understand how the cancer story relates to us and how do we improve it? ASCO Daily News: Thank you, Dr. Bruegl. Dr. LoConte, would you like to comment on this as well? Dr. Noelle LoConte: Yeah. I had jotted down a few points. Many are going to be a little bit of a repetition here, but I think the overarching theme is that the goals for academic medicine often are not the goals of the community that you may be seeking to work in, and so being able to pivot was key to the success of my project, I think. Can't underestimate the importance of trust. And trust takes a lot of time and a lot of showing up and a lot of being consistent and delivering on what you say you're going to do. And there's a lot of turnover in academic medicine. People leave institutions, move on for promotions. None of that is going to help strengthen these relationships. So I think institutions would be wise to invest in people that stay. I think there should be things like retention bonuses for those of us that stay in places and do community work. It's certainly not the sexy stuff. It's not what gets you in the Plenary at the ASCO Annual Meeting, for example, but I was beyond delighted that I was on the podium for the ASCO Quality Care Symposium. And I think continuing to elevate this work as meaningful and important work, just as important as clinical trials and new drugs, is really important. I would like to second the motion or the thought that we need to support full funding for the Indian Health Services. It is a promise we made that we continue to underdeliver on that continues to harm patients every day, particularly in the latter half of the year when they run out of funding pretty consistently. For those of us that are non-Native doing this work, to know the history of the community that you're working in and be really mindful of that but also know the role that your institution played in propagating some of these harms. And I think we need more Native physicians that really will help to have concordance with patients and physicians. And so as much as we can support getting more Native folks starting really early – high school, middle school, interested in medicine and biomedical research, all the way through medical school residency fellowship would be really, really impactful. We have a program here founded by Amanda's husband called the , or NACHP. It's really a feather in our cap here and I would love to see all medical schools have some sort of pathway program like that. We won't get out of this hole until we start to really take that seriously. ASCO Daily News: Well, thank you so much, Dr. LoConte and Dr. Bruegl for taking the time and showing up for Native communities, and all your work to advance cancer care. We are certainly very grateful for your time today and we will embed links to all of the studies discussed in the transcript of this episode. So thank you again, Dr. LoConte and Dr. Bruegl. Dr. Noelle LoConte: You're welcome. Dr. Amanda Bruegl: Thank you for having us. ASCO Daily News: And thank you to our listeners for your time today. Again, you'll find links to the studies we discussed today in the transcript of this episode. Finally, if you value the insights that you hear on the ASCO Daily News Podcast, please take a moment to rate, review and subscribe wherever you get your podcasts. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity or therapy should not be construed as an ASCO endorsement. Follow today’s speakers: @noelleloconte.bsky.social Follow ASCO on social media: Disclosures: Dr. Amanda Bruegl – No relationships to disclose Dr. Noelle LoConte: Consulting or Advisory Role: Abbvie, PDGx Research Funding: Exact Sciences
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What Challenges Will Oncologists Face in 2025?
12/05/2024
What Challenges Will Oncologists Face in 2025?
Dr. Nathan Pennell and Dr. John Sweetenham discuss the evolving landscape of oncology in 2025 and the challenges oncologists will be facing, including the impact of Medicare drug price negotiations, ongoing drug shortages, and the promising role of AI and telehealth in improving patient outcomes and access to clinical trials. TRANSCRIPT Dr. John Sweetenham: Hello, I'm Dr. John Sweetenham, the host of the ASCO Daily News Podcast. 2025 promises to be a year of continued progress in drug development, patient care, and technological innovations that will shape the future of cancer care. Oncologists will also be grappling with some familiar challenges in oncology practice and probably face a few new ones as well. I'm delighted to be joined today by Dr. Nathan Pennell to discuss some of these challenges. Dr. Pennell is the co-director of the Cleveland Clinic Lung Cancer Program and vice chair of clinical research at the Taussig Cancer Center. He also serves as the editor-in-chief of the . You'll find our full disclosures in the transcript of this episode. Nate, it's great to have you on the podcast today. Dr. Nathan Pennell: Thanks for inviting me, John. I'm excited to be here. Dr. John Sweetenham: Thanks. So, Nate, we've been hearing a lot recently about implementation science in oncology particularly. This has been the case, I would say, over the past decade and of course the goal is to how do we figure out the best way to integrate evidence-based practice into oncology care? There's been a lot of very good guidance from organizations like ASCO and every year we're reminded of the need for clinical decision support for practicing oncologists at the point of care. Although I think we all agree it is the right thing to do, and this has been a matter of discussion for probably more than 10 years, for the most part, I don't think we've really got there. Some big practices probably have a truly well-integrated clinical decision support tool, but for many of us this is still lacking in the field. I wonder whether we do need some kind of global clinical decision support tool. What do you think about the future of clinical decision support at the point of care? And do you think this is going to continue to be a need? Dr. Nathan Pennell: I think that's a fantastic question and it absolutely is something we're going to continue to work towards. We're in an incredibly exciting time in oncology. We've got all these exciting predictive biomarkers, effective treatments that are working better than anything we've had in our careers up to this point. But when we actually look to see who is benefiting from them, what we find is that outside of clinical trial populations, many of our patients aren't actually accessing these. And so publications that look at real-world use of these, one that jumps to mind for me is a publication looking at biomarker testing for driver oncogenes in lung cancer showed that while everyone who treats lung cancer says, “Absolutely, we need to test for biomarkers such as EGFR mutations,” in the real world, probably only slightly over a third of people ever access these drugs because there are so many different gaps in care that fall through the cracks. And so decision support is absolutely critical. You mentioned this has been going on for a decade. Actually, the Institute of Medicine in 2013 recommended that with the uptake of electronic medical records, that we move forward with building these true learning health care systems that would improve quality and use every patient's information to help inform their care. And in 2023, as a representative of ASCO, I was able to look back at the last decade, and the uniform conclusion was that we had failed to build this learning health care system. So, what can we do going forward? The good news is there are improvements in technology. There are, for better or for worse, some consolidation of electronic medical records that has allowed larger numbers of patients to sort of have data sets shared. ASCO started CancerLinQ to try to improve quality, which is now part of OpenAI, and is still working on technology solutions to help provide decision support as we are better able to access patient data. And I think we're going to talk a little bit later about some of the technological advances that are going on in artificial intelligence that are really going to help improve this. So I think this is very close to impacting patient care and improving quality of care. I think for, as you'd mentioned, large health care systems and users of the major EMRs, this is going to be extremely close. Dr. John Sweetenham: Thanks, Nate. And just to extend the conversation into another area, one of the constant, I think, pain points for practicing oncologists has been the issue of prior authorization and the amount of time and energy it takes to deal with insurance denials in cancer care. And I think in a way, these two things are linked in as much as if we had clinical decision support tools at the point of care which were truly functional, then hopefully there would be a more facile way for an oncologist to be able to determine whether the patient in front of him or her is actually covered for the treatment that the oncologist wants to prescribe. But nevertheless, we're really not there yet, although, I think we're on the way to being there. But it does remain, like I said, a real pain point for oncologists. I wonder if you have any thoughts on the issue of prior authorization and whether you see in the coming year anything which is going to help practicing oncologists to overcome the time and effort that they spend in this space. Dr. Nathan Pennell: I think many oncologists would have to list this among, if not the least favorite aspects of our job these days is dealing with insurance, dealing with prior authorizations. We understand that health care is incredibly expensive. We understand that oncology drugs and tests are even more expensive, probably among, if not the most rapidly growing costs to the health care system in the U.S., which is already at about 20% of our GDP every year. And so I understand the concern that costs are potentially unsustainable in the long term. Unfortunately, the major efforts to contain these costs seem to have fallen on the group that we would least like to be in charge of that, which are the payers and insurance companies, through use of prior authorization. And this is good in concept, utilization review, making sure that things are appropriate, not overutilizing our expensive treatments, that makes perfect sense. Unfortunately, it's moved beyond expensive treatments that have limited utility to more or less everything, no matter how inexpensive or standard. And there's now multiple publications suggesting that this is taking on massive amounts of time. Some even estimated that for each physician it's a full 40-hour work week per physician from someone to manage prior authorizations, which costs billions of dollars for practices every year. And so this is definitely a major pain point. It is, however, an area where I'm kind of optimistic, maybe not necessarily in 2025, but in the coming several years with some of the technology solutions that are coming out, as we've talked about, with things like clinical pathways and whatnot, where the insurance company approvals can be tied directly to some of these guideline concordance pathway tools. So the recent publication at the ASCO Quality [Care] Symposium looking at a radiation oncology practice that had a guideline concordant prior auth tool that showed there was massive decrease in denials by using this. And as this gets rolled out more broadly, I think that this can increase the concept of gold carding, where if practices follow these clinical guidelines to a certain extent, they may be even exempt from prior authorization. I think I can envision that this is very close to potentially removing this as a major problem. I know that ASCO certainly has advocated on the national level for changes to this through, for example, advocating for the Improving Seniors Timely Access to Care Act. But I think, unfortunately, the recent election, I'm not sure how much progress will be made on the national level for progress in this. So I think that the market solutions with some of the technology interventions may be the best hope. Dr. John Sweetenham: Yeah, thanks. You raised a couple of other important points in that answer, Nate, which I'll pick up on now. You mentioned drug prices, and of course, during 2025, we're going to see Medicare negotiating drug prices. And we've already seen, I think, early effects from that. But I think it's going to be really interesting to see how this rolls out for our cancer patients in 2025. And of course, the thing that we can't really tell at the moment that you've alluded to is how all this is going to evolve with the new administration of President Trump. I understand, of course, that none of us really knows at this point; it's too early to know what the new administration will do. But would you care to comment on this in any way and about your concerns and hopes for Medicare specifically and what the administration will do to cancer care in general? Dr. Nathan Pennell: I think all of us are naturally a little bit anxious about what's going to happen under the new administration. The good news, if there's good news, is that under the first Trump administration, the National Cancer Institute and cancer care in general was pretty broadly supported both in Congress and by the administration. And if we look at specifically negotiating drug prices by Medicare, you can envision that having a businessman president who prides himself in negotiations might be something that would be supported and perhaps even expanded under the incoming Trump administration. So I think that's not too hard to imagine, although we don't really know. On the other hand, there are very valid concerns about what's going to happen with the Affordable Care Act, with Medicaid expansion, with protections for preexisting conditions, which impact our patients with cancer. And obviously there are potential people in the new administration who perhaps lack trust in traditional evidence-based medicine, vaccines, things like that, which we're not sure where they're going to fall in terms of the health care landscape, but certainly something we'll have to watch out for. Dr. John Sweetenham: Yeah. Certainly, when we regroup to record next year's podcast, we may have a clearer picture of how that's going to play out. Dr. Nathan Pennell: I mean, if there's anything good from this, it's that cancer has always been a bipartisan issue that people support. And so I don't want to be too negative about this. I do think that public support for cancer is likely to continue. And so overall, I think we'll probably be okay. Dr. John Sweetenham: Yeah, I agree with that. And I think one of the things that's important to remember, I do remember that one of the institutions I've worked at previously that there from time to time was some discussion about politics and cancer care. And the quote that I always remember is “We all belong to the cancer party,” and that's what's really important. So let's just keep our eye on the board. I hope that we can do that. I'm going to switch gears just a little bit now because another issue which has been quite prominent in 2024 and in a few years before that has been supply chain issues and drug shortages. We've seen this over many years now, but obviously the problems have apparently been exacerbated in recent years, particularly by climate events. But certainly ASCO has published some recommendations in terms of quality care delivery for patients with cancer. Can you tell us a little bit about how you think this will go in the coming year and what we can do to address some of the concerns that are there over drug shortages? Dr. Nathan Pennell: Yeah. This continues to be, I think, a surprising issue for many oncologists because it has been going on for a long time, but really hasn't been in the public eye. The general problem is that once drugs go off patent and become generic, they often have limited manufacturers that are often outside the U.S. sometimes even a single manufacturer, which leaves them extremely vulnerable to supply chain disruption issues or regulatory issues. So situations where the FDA inspects and decides that they're not manufacturing things up to snuff and suddenly the only manufacturer is temporarily shut down. And then as you mentioned, things like extreme weather events where we had Hurricane Maria hit Puerto Rico and suddenly we have no bags of saline for several months. And so these are major issues which I think have benefited from being in the public eye. ASCO, on the one hand, has, I think, done an excellent job leading on what to do in scenarios where there are shortages. But I think more importantly, we need more attention on a national level to policy changes that would help prevent this in the future. Some suggestions have been to increase some of the oversight of the FDA into supply chain issues and generic drugs, perhaps forming more of an early warning system to anticipate shortages so that we can find workarounds, find alternative suppliers that perhaps aren't currently being widely utilized. We can advocate for our legislators to pass legislation to support drug production for vital agents through things like long term contracts or even guaranteed pricing that might also even encourage U.S. manufacturers to take back up generic drugs if they were able to make it profitable. And then finally, I think just more of a national coordinated approach rather than the piecemeal approach we've done in the past. I remember when we had a platinum [drug] shortage last year. Our institution, with massive resources in our pharmacy, really did an excellent job of making sure that we always had enough supply. We never actually saw that shortage in real time, but I know a lot of places did not have those resources and therefore were really struggling. And so I think more of a coordinated approach with communication and awareness so that we can try to prevent this from happening. Dr. John Sweetenham: Thanks, Nate. And you raised the issue of major weather events, and I'd like to pick up on that for just a moment to talk about climate change. We now know that there is a growing body of evidence showing that climate change impacts cancer care. And it does it in a lot of ways. I mean, the most obvious is disrupting care delivery during one of these major events. But there are also issues about increased exposure to carcinogens, reduced access to food, reduced access to cancer screenings during these major disasters. And the recent hurricanes, of course, have highlighted the need for cancer centers to have robust disaster preparedness plans. In addition to that, obviously there are questions about greenhouse gas emissions and how cancer centers and health care organizations handle that. But what do you see for 2025 in this regard? And what's your thinking about how well we're prepared as deliverers of cancer care to deal with these climate change issues? Dr. Nathan Pennell: Yeah, that is sobering to look at some of the things that have happened with climate change in recent years. I would love to say that I think that from a national level, we will see these changes and proactively work to reduce greenhouse emissions so that we can reduce these issues in the future. I'm not sure what we're going to see from the incoming administration and current government in terms of national policy on changes for fossil fuel use and climate change. I worry that there's a chance that we may see less done on the national level. I know the NCI certainly has policies in place to try to study climate change impact on cancer. It's possible that even that policy could be impacted by the incoming administration. So we'll have to see. So, unfortunately, I worry that we may be still dealing in a reactive way to the impacts of this. So, obviously, wildfires causing carcinogens, pollution leading to increased cancer incidence, obviously, major weather events leading to physical disruptions, where cancer centers definitely have to have plans in place to help people maintain their treatment during those periods. As an individual, we can certainly make our impact on climate change. There are certainly organizations like Oncologists United for Climate and Health, or so-called OUCH, led by Dr. Joan Schiller, a friend of mine in the lung cancer world, where oncologists are advocating for policies to reduce use of fossil fuels. But I don't know, John, I don't know if I'm hopeful that there's going to be major policy changes on this in the coming year. Dr. John Sweetenham: I suspect you're right about that, although I think on the positive side, I think the issue as a whole is getting a lot more attention than it was maybe even two or three years ago. So that has to be a good thing that there's more advocacy and more attention out there now. Nate, before we go on to the last question, because I do want to finish on a positive note, I just wanted to mention briefly that there are a couple of ongoing issues which, when we do this podcast each year, we normally address, and they certainly haven't gone away. But we know that burnout and workforce issues in oncology will continue to be a big challenge. The workforce issues may or may not be exacerbated by whatever the new administration's approach to immigration is going to be, because that could easily significantly affect the workforce in oncology. So that's one issue around workforce and burnout that we are not addressing in detail this year. But I wanted to raise it just because it certainly hasn't gone away and is going to continue to challenge us in 2025. And then the other one, which I kind of put in the same category, is that of disparities. We continue to see ethnic and racial disparities of care. We continue to see disparities in rural areas. And I certainly wouldn't want to minimize the challenges that these are likely to continue to present in 2025. I wonder if you just have any brief comments you'd like to make and whether you think we're headed in the right direction with those issues. Dr. Nathan Pennell: Well, I'm somewhat optimistic in some ways about burnout. And I think when we get to our final topic, I think some of that may help. There may be some technology changes that may help reduce some of the influences of burnout. Disparities in care, obviously, I think similarly to some of the other issues we talked about have really benefited from just a lot of attention being cast on that. But again, I actually am optimistic that there are some technology changes that are going to help reduce some disparities in care. Dr. John Sweetenham: It's always great to finish one of these conversations on a positive note, and I think there is a lot to be very positive about. As you mentioned right at the beginning of the podcast, we continue to see quite extraordinary advances, remarkable advances in all fields of oncology in the therapeutic area, with just a massive expansion in not only our understanding, but also resulting from that improved understanding of the biology of the disease, the treatment advances that have come along. And so I think undoubtedly, we're going to see continued progress during 2025. And I know that there are technology solutions that you've mentioned already that you're very excited about. So, I'd really like to finish today by asking you if you could tell us a little about those and in particular what you're excited about for 2025. Dr. Nathan Pennell: Yeah. It's always dangerous to ask me to nerd out a little bit about some of these...
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A New Standard of Care for Cervical Cancer: Assessing the KEYNOTE-A18 Study
11/21/2024
A New Standard of Care for Cervical Cancer: Assessing the KEYNOTE-A18 Study
Dr. Linda Duska and Dr. Domenica Lorusso discuss the practice-changing results of the phase 3 ENGOT-cx11/GOG-3047/KEYNOTE-A18 study, which evaluated pembrolizumab plus chemoradiotherapy as treatment for previously untreated, high-risk, locally advanced cervical cancer. TRANSCRIPT Dr. Linda Duska: Hello, I'm Linda Duska, your guest host of the ASCO Daily News Podcast today. I'm a professor of obstetrics and gynecology and serve as the associate dean for clinical research at the University of Virginia School of Medicine. On today's episode, we'll be discussing a new standard of care for previously untreated, high- risk locally advanced cervical cancer. This follows the study, which I will be referring to as for the rest of this podcast, which demonstrated that pembrolizumab plus chemoradiotherapy improved both progression-free and overall survival compared to chemoradiotherapy alone. I was a co-author of this , and I'm delighted to be joined today by the study's lead investigator, Dr. Domenica Lorusso, for today's discussion. She is also a professor of obstetrics and gynecology. She's at Humanitas University Rosano and the director of the Gynecologic Oncology Unit at the Humanitas Hospital San Pio in Milan, Italy. Our full disclosures are available in the transcript of this episode. Dr. Lorusso, it's great to be speaking with you today. Dr. Domenica Lorusso: Thank you, Linda. It's a great pleasure to be here. Thank you. Dr. Linda Duska: So I was hoping you could start us out with some context on the challenges associated with treating patients with high-risk, locally advanced cervical cancer. Dr. Domenica Lorusso: Yes. I have to make a disclosure because in my experience as a gynecologist, cervical cancer patients are the most difficult patients to treat. This is a tumor that involves young patients [who often have] small kids. This is a very symptomatic tumor. More than 50% of patients report pain. Sometimes the pain is difficult to control because there is an infiltration of the pelvic nerves and also a kind of vaginal discharge, so it's very difficult to treat the tumor. Since more than 25 years, we have the publication of 5 randomized trials that demonstrate that when we combine platinum chemotherapy to radiation treatment, we increase overall survival by 6%. This is the new standard of care – concurrent chemoradiation plus brachytherapy. This is a good standard of care because particularly modern, image-guided radiotherapy has reported to increase local control. And local control in cervical cancer translates to better overall survival. So modern radiotherapy actually is able to cure about 75% of patients. This is what we expect with chemoradiation right now. Dr. Linda Duska: So what are the key takeaways of ? This is a really exciting trial, and you've presented it a couple of times. Tell us what are the key takeaways that you want our listeners to know. Dr. Domenica Lorusso: Linda, this is our trial. This is a trial that we did together. And you gave me the inspiration because you were running a randomized phase 2 trial exploring if the combination of pembrolizumab to concurrent chemoradiation was able to give signals of efficacy, but also was feasible in terms of toxicity. There were several clinical data suggesting that when we combine immunotherapy to radiotherapy, we can potentially increase the benefit of radiotherapy because there is a kind of synergistic effect between the two strategies. Radiotherapy works as a primer and immunotherapy works better. And you demonstrated that it was feasible to combine immunotherapy to concurrent chemoradiation. And was based on this preliminary data. We randomized about 1,060 patients to receive concurrent chemoradiation and brachytherapy or concurrent chemoradiation and brachytherapy in combination with pembrolizumab followed by pembrolizumab for about two years. Why two years? Because in more than 80% of cases, recurrence in this patient population occurred during the first two years. So the duration of treatment was based on the idea to provide protection to the patient during the maximum time of risk. And the trial had the two primary endpoints, progression free and overall survival, and met both the endpoints, a significant 30% reduction in the risk of progression that was confirmed. At the 3-year follow up, the observation was even better, 0.68. So 32% reduction in the risk of progression. And more importantly, because this is a curative setting, 33% reduction in the risk of death was reported in the experimental arm when pembro was combined with chemoradiation. Dr. Linda Duska: That's amazing. I wanted to ask you, a prior similar study called CALLA was negative. Why do you think A18 was positive? Dr. Domenica Lorusso: Linda, there are several discussions about that. I had the possibility to discuss several times with the PI of , Brad Monk. The idea of Brad is that CALLA was negative because of using durvalumab instead of PD-1 inhibitor, which is pembrolizumab. I do not have exactly the same impression. My idea is that it's the kind of patient population enrolled. The patient population enrolled in was really a high-risk population; 85% of that patient were node positive, where the definition of node positivity was at least 2 lymph nodes in the pelvis with a short diameter of 1.5. So, we are very confident this patient was node-positive, 55% at the grade 3 and 4 diseases. So this is really a high-risk population. I remember at the first presentation of CALLA, I was honored to discuss the CALLA trial when it was first presented at IGCS a few years ago. And when I received the forest plot of Calla, it was evident to me that in patients with stage III and node positive there was a signal of efficacy. And we have a huge number of patients with node positive. So in my opinion this is the reason why KEYNOTE-A18 is positive. Dr. Linda Duska: Yeah, I agree with you. I've thought about it a lot and I think you're right about that. The trial results were recently published. How should we interpret these results in the context of A18? Dr. Domenica Lorusso: So it's very difficult to compare the 2 trials. First of all, in terms of population. The population enrolled in is a low-risk, locally advanced but low risk population; 76% were stage II, 10% were stage I, 60% were node-negative patients. So, first of all, the population is completely different. Second is the type of radiotherapy that was provided. is a 10-year long trial, but in 10 years the quality and the technique of radiotherapy completely changed. Only 30% of patients in INTERLACE received what we call the modern image-guided brachytherapy, which is important because it provides local control and local control increases overall survival. And third, we read the paper. I'm not a methodologist, but there are some methodological biases in the paper. All the statistical design of the trial was based on PFS, but PFS was evaluated at physician description. And honestly, I never saw a trial that had no pre-specified timeline for radiological evaluation. It's very difficult to evaluate progression in cervical cancer because the fibrosis related to radiotherapy changes the anatomy in the pelvis. And I think that the radiological evaluation is important to address if the patient is progressing or not. Particularly, because the conclusion of is that the PFS was mainly in favor of distant metastasis. So really, it's difficult for me to understand how distant metastasis may be evaluated with the vagina visit. So really, it's very difficult to compare the two trials, but I have some concerns. And also because of toxicity in the study, unfortunately 30% of patients did not complete concurrent chemoradiation because of residual toxicity due to induction chemotherapy. So I wanted to be sure in the context of modern radiotherapy, if really induction chemo adds something to modern radiotherapy. Dr. Linda Duska: Well, I have two more questions for you. As we move immunotherapy into the front line, at least for these high risk locally advanced cervical cancer patients that were eligible for A18, what does that mean then for hopefully those few that develop recurrence in terms of second line therapy? Dr. Domenica Lorusso: Well, Linda, this is a very important question. We do not have data about immuno after immuno, but I would not completely exclude this hypothesis because in KEYNOTE-A18, the patient received treatment for a well-defined time period. And for those patients not progressing during immunotherapy, I really guess if there is a space for the reintroduction of immunotherapy at the time of recurrence. In this moment we have 30% of patients in KEYNOTE-A18 in the control arm that receive immunotherapy after progression, but still we have 11% of patients that receive immunotherapy in combination with concurrent chemoradiation and then receive, again, immunotherapy in later line of therapy. I think we need to collect these data to capture some signals and for sure we have the new drug. We have antibody drug conjugate. The trials are ongoing exploring the role of antibody drug conjugate, particularly in immune pretreated patients. So I think this is a very interesting strategy. Dr. Linda Duska: I was going to ask you, “What are the next steps,” but I think you already answered that question. You talked about the second line. If you were going to redesign a study in the frontline, what would it look like? Dr. Domenica Lorusso: Probably one question that I would like to answer – there are two questions in my opinion in KEYNOTE-A18 – one is induction immunotherapy. Linda, correct me if I'm wrong, you reported very interesting data about the immune landscape change when you use induction immunotherapy. And I think this is something that we need to explore in the future. And the second question is the duration of maintenance. Because, again, we decided for two years based only on the epidemiology of recurrence, but I guess if one year may be enough. Dr. Linda Duska: I think this sequencing question is really important, that the induction immunotherapy was actually . I can't take credit for that, but I think you're right. I think the sequencing question is really important. Whether you need the concurrent IO or not is an important question. And then to your point about the 2 years, the length of the need for maintenance therapy is a question that we don't know the answer to. So there are lots of really important questions we can continue to ask. I want to thank you so much for sharing your valuable insights with us on the podcast today. You're always so thoughtful about this particular study and cervix cancer in general and also for your great work to advance the care for patients with GYN cancers. Dr. Domenica Lorusso: Thank you, Linda. It's our work - we progress together. Dr. Linda Duska: Yes. And we thank the patients as well. The over 1,000 patients that went on this trial during a pandemic. Right? Dr. Domenica Lorusso: Absolutely. Without their generosity and their trust, we would not be able to do this trial. Dr. Linda Duska: So we're very grateful to them and we thank our listeners for your time today. If you value the insights that you hear on the ASCO Daily News Podcast, please take a moment to rate, review and subscribe wherever you get your podcasts. Thank you all. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity or therapy should not be construed as an ASCO endorsement. Follow today’s speakers: Follow ASCO on social media: Disclosures: Dr. Linda Duska: Consulting or Advisory Role: Regeneron, Inovio Pharmaceuticals, Merck, Ellipses Pharma Research Funding (Inst.): GlaxoSmithKline, Millenium, Bristol-Myers Squibb, Aeterna Zentaris, Novartis, Abbvie, Tesaro, Cerulean Pharma, Aduro Biotech, Advaxis, Ludwig Institute for Cancer Research, Leap Therapeutics Patents, Royalties, Other Intellectual Property: UptToDate, Editor, British Journal of Ob/Gyn Dr. Domenica Lorusso: Consulting or Advisory Role: PharmaMar, AstraZeneca, Clovis Oncology, GSK, MSD, Genmab, Seagen, Immunogen, Oncoinvest, Corcept, Sutro Biopharma, Novartis, Novocure, Daiichi Sankyo/Lilly Speakers’ Bureau: AstraZeneca, Clovis, GSK, MSD, ImmunoGen, Seagen Research Funding (Inst.): PharmMar, Clovis, GSK, MSD, AstraZeneca, Clovis Oncology, Genmab, Seagen, Immunogen, Incyte, Roche, Pharma&, Corcept Therapeutics, Alkermes Travel, Accommodations, Expenses: AstraZeneca, Clovis, GSK, Menarini
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Advances in Immunotherapy for Melanoma and Beyond
10/31/2024
Advances in Immunotherapy for Melanoma and Beyond
Dr. Ryan Augustin and Dr. Jason Luke discuss neoadjuvant immunotherapy and the importance of multidisciplinary team coordination, promising new TIL therapy for advanced melanoma, and the emerging role of CD3 engagers in treatment strategies. TRANSCRIPT Dr. Ryan Augustin: Hello, I'm Dr. Ryan Augustin, your guest host of the ASCO Daily News Podcast today. I'm a medical oncology fellow at Mayo Clinic in Rochester, Minnesota. Joining me today is Dr. Jason Luke, an associate professor of medicine and the director of the Cancer Immunotherapeutic Center at the University of Pittsburgh Hillman Cancer Center. I had the privilege of working as a postdoc in Jason's translational bioinformatics lab, where we investigated mechanisms of resistance to immunotherapy in melanoma and other cancers. Today, we'll be discussing 3 important topics, including neoadjuvant immunotherapy and the importance of multidisciplinary team coordination, the impact and practical considerations for incorporating TIL therapy into melanoma, and the current and future use of CD3 engagers in both uveal and cutaneous melanoma. You'll find our full disclosures in the transcript of this episode. Jason, it's great to have this opportunity to speak with you today. Dr. Jason Luke: Absolutely. Thanks, Ryan. It's great to see you. Dr. Ryan Augustin: So, to kick things off, Jason, we, of course, have seen tremendous advances in cancer immunotherapy, not only in metastatic disease but also the perioperative setting. Recent data have shown that the use of neoadjuvant therapy can provide not only critical prognostic information but can also help individualize post-resection treatment strategies and potentially even eliminate adjuvant therapy altogether in patients who achieve a pathologic, complete response. This signifies a conceptual shift in oncology with the goal of curing patients with immunotherapy. In triple-negative breast cancer, the regimen with pembrolizumab is standard of care. In non-small cell lung cancer, there are now four FDA approved chemo-IO regimens in both the neoadjuvant and perioperative settings. And, of course, in melanoma, starting with utilizing pembro mono therapy, and now with combined CTLA-4 PD-1 blockade based on results from the trial, neoadjuvant IO is the new standard of care in high-risk, resectable melanoma. It's important to highlight this because whereas other tumor types have more mature multidisciplinary care, for example, patients with breast cancer are reviewed by the whole team in every center, and every patient with lung cancer certainly benefits from multidisciplinary care conferences, that's not always the case with melanoma, given the relative frequency of cases compared to other tumor types. Jason, would you say that we have now moved into an era where the integration of a multidisciplinary team and melanoma needs to be prioritized. And why is it important to have multidisciplinary team coordination from the onset of a patient's diagnosis? Dr. Jason Luke: Well, I think those are great questions, Ryan, and I think they really speak to the movement in our field and the great success that we've had integrating systemic therapy, particularly immunotherapy, into our treatment paradigms. And so, before answering your question directly, I would add even a little bit more color, which is to note that over the last few years, we've additionally seen the development of adjuvant therapy into stages of melanoma that, historically speaking, were considered low-risk, and medical oncologists might not even see the patient. To that, I'm speaking specifically about the stage 2B and 2C approvals for adjuvant anti-PD-1 with pembrolizumab or nivolumab. So this has been an emerging complication. Classically, patients are diagnosed with melanoma by either their primary care doctor or a dermatologist. Again, classically, the next step was referral to a surgeon who had removed the primary lesion, with discussion around nodal evaluation as well. And that paradigm has really changed now, where I think integration of medical oncology input early on in the evaluation of the appropriate treatment plan for patients with melanoma is quite a pressing issue now, both because we have FDA approvals for therapeutics that can reduce risk of recurrence, and whether or not to pursue those makes a big difference to the patient for discussion early on. And, moreover, the use of systemic therapies now, prior to surgery, of course, then, of course, requires the involvement of medical oncology. And just for an emphasis point on this, it's classically the case, for good reason, that surgeons complete their surgery and then feel confident to tell the patient, “Well, we got it all, and you're just in really good shape.” And while I understand where that's coming from, that often leaves aside the risk of recurrence. So you can have the most perfect surgery in the world and yet still be at very high risk of recurrence. And so it's commonly the case that we get patients referred to us after surgery who think they're just in totally good shape, quite surprised to find out that, in fact, they might have a 20% to 50% risk of recurrence. And so that's where this multidisciplinary integration for patient management really does make a big difference. And so I would really emphasize the point you were making before, which is that we need multidisciplinary teams of med onc with derm, with surgery early on, to discuss “What are the treatment plans going to be for patients?” And that's true for neoadjuvant therapy, so, for palpable stage 3, where we might give checkpoint inhibitors or combinations before surgery. But it's true even in any reasonably high-risk melanoma, and I would argue in that state, anything more than stage 1 should be discussed as a group, because that communication strategy with the patient is so important from first principles, so that they have an expectation of what it's going to look like as they are followed out over time. And so we're emphasizing this point because I think it's mostly the case at most hospitals that there isn't a cutaneous oncology disease management meeting, and I think there needs to be. It's important to point out that usually the surgeons that do this kind of surgery are actually either the GI surgeons who do colon cancer or the breast surgeons. And so, given that melanoma, it's not the most common kind of cancer, it could easily be integrated into the existing disease review groups to review these cases. And I think that's the point we really want to emphasize now. I think we're not going to belabor the data so much, but there are enormous advantages to either perioperative or adjuvant systemic therapy in melanoma. We're talking about risk reduction of more than 50%, 50-75% risk reduction. It's essential that we make sure we optimally offer that to patients. And, of course, patients will choose what they think is best for their care. But we need to message to them in a way that they can understand what the risks and benefits of those treatments are and then are well set up to understand what that treatment might look like and what their expectations would be out over time. So I think this is a great art of medicine place to start. Instead of belaboring just the details of the trial to say, let's think about how we take care of our patients and how we communicate with them on first principles so that we can make the most out of the treatments that we do have available. Dr. Ryan Augustin: That's great, Jason. Very insightful points. Thank you. So, shifting gears now, I'd also like to ask you a little bit about TIL therapy in melanoma. So our listeners will be aware that TIL is a promising new approach for treating advanced melanoma and leverages the power of a patient's cytotoxic T cells to attack cancer cells. While we've known about the potential of this therapy for some time, based on pioneering work at the NCI, this therapy is now FDA approved under the brand AMTAGVI (Lifileucel) from Iovance Biotherapeutics, making it the first cellular therapy to be approved for a solid tumor. Now, I know TIL therapy has been administered at your institution, Jason, for several years now, under trial status primarily for uveal melanoma using an in-house processing. But for many cancer centers, the only experience with cellular therapy has come under the domain of malignant hematology with CAR T administration. At our institution, for example, we have only recently started administering TIL therapy for melanoma, which has required a tremendous multidisciplinary effort among outpatient oncology, critical care, and an inpatient hematology service that has expertise in cytokine release syndrome. Jason, where do you see TIL therapy fitting into the metastatic space? Which patients do you think are truly candidates for this intensive therapy? And what other practical or logistical considerations do you think we should keep in mind moving forward? Dr. Jason Luke: Well, thanks for raising this. I think the approval of lifileucel, which is the scientific name for the TIL product that's on the market now. It really is a shift, a landscape shift in oncology, and we're starting in melanoma again, as seems to be commonly the case in drug development. But it's really important to understand that this is a conceptually different kind of treatment, and therefore, it does require different considerations. Starting first with data and then actualization, maybe secondarily, when we see across the accelerated approval package that led to this being available, we quote patients that the response rate is likely in the range of 30%, maybe slightly lower than that, but a meaningful 25% to 30% response rate, and that most of those patients that do have response, it seems to be quite durable, meaning patients have been followed up to four years, and almost all the responders are still in response. And that's a really powerful thing to be able to tell a patient, particularly if the patient has already proceeded through multiple lines of prior standard therapy. So this is a very, very promising therapy. Now, it is a complicated therapy as well. And so you highlighted that to do this, you have to have a tumor that's amenable for resection, a multidisciplinary team that has done a surgery to remove the tumor, sent it off to the company. They then need to process the TIL out of the tumor and then build them up into a personalized cell product, bring it back, you have to lympho-deplete the patient, re-introduce this TIL. So this is a process that, in the standard of care setting under best circumstances, takes roughly six weeks. So how to get that done in a timely fashion, I think, is evolving within our paradigms. But I think it is very important for people who practice in settings where this isn't already available to realize that referring patients for this should be a strong consideration. And thinking about how you could build your multidisciplinary team in a way to be able to facilitate this process, I think is going to be important, because this concept of TIL is relevant to other solid tumors as well. It's not approved yet in others, but we kind of assume eventually it probably will be. And so I think, thinking through this, how could it work, how do you refer patients is very important. Now, coming back to the science, who should we treat with this? Well, of course, it's now an air quotes “standard of care option”, so really it ought to be available to anybody. I will note that currently, the capacity across the country to make these products is not really adequate to treat all the patients that we’d want. But who would we optimally want to treat, of course, would be people who have retained a good performance status after first line therapy, people who have tumors that are easily removable and who have not manifested a really rapid disease progression course, because then, of course, that six-week timeline probably doesn't make sense. The other really interesting data point out of the clinical trials so far is it has looked like the patients who got the least amount of benefit from anti-PD-1 immunotherapy, in other words, who progressed immediately without any kind of sustained response, those patients seem to have the best response to TILs, and that's actually sort of a great biomarker. So, this drug works the best for the population of patients where checkpoint inhibitors were not effective. And so as you think about who those patients might be in your practice, as you're listening, I think prioritizing it for primary progression on anti PD-1, again and giving it ahead thought about how would you get the patient through this process or referred to this process very quickly is really important because that lag time is a problem. Patients who have melanoma tend to progress reasonably quickly, and six weeks can be a long time in melanoma land. So, thinking ahead and building those processes is going to be important moving into the future Dr. Ryan Augustin: Definitely appreciate those practical considerations. Jason, thank you. Moving on to our final topic, I was hoping to discuss the use of immune cell engagers in melanoma. So, similar to CAR T therapy, bispecific T-cell engagers, or BiTEs, as they're commonly known, are standard of care in refractory myeloma and lymphoma. But these antibodies engaging CD-3 on T cells and a tumor specific antigen on cancer cells are relatively new in the solid tumor space. Tarlatamab, which is a DLL-3 and CD-3 bispecific antibody, was recently approved in refractory small cell lung cancer, and, of course, tebentafusp, an HLA-directed CD-3 T cell engager was approved in uveal melanoma in 2022. Both T and NK cell engaging therapies are now offering hope in cancers where there has historically been little to offer. However, similar to our discussion with TIL therapy, bispecifics can lead to CRS and neurotoxicity, which require considerable logistical support and care coordination. Jason, I was wondering if you could briefly discuss the current landscape of immune cell engagers in melanoma and how soon we may see these therapies enter the treatment paradigm for cutaneous disease. Dr. Jason Luke: I think it is an exciting, novel treatment strategy that I think we will only see emerge more and more. You alluded to the approval of tebentafusp in uveal melanoma, and those trials were, over the course of a decade, where those of us in solid tumor land learned how to manage cytokine release syndrome or the impact of these C3 bispecifics, in a way that we weren't used to. And what I'll caution people is that CRS, as this term, it sounds very scary because people have heard of patients that, of course, had difficult outcomes and hematological malignancies, but it's a spectrum of side effects. And so, when we think about tebentafusp, which is the approved molecule, really what we see is a lot of rash because GP100, the other tumor antigen target, is in the skin. So, patients get a rash, and then people do get fevers, but it's pretty rare to get more than that. So really what you have to have is the capacity to monitor patients for 12 hours, but it's really not more scary than that. So it really just requires treating a few people to kind of get used to these kinds of symptoms, because they're not the full-on ICU level CRS that we see with, say, CAR T-cells. But where is the field going? Well, there's a second CD3 bispecific called brenetafusp that targets the molecule PRAME, that's in a phase 3 clinical trial now for frontline cutaneous melanoma. And tebentafusp is also being evaluated in cutaneous melanoma for refractory disease. So, it's very possible that these could be very commonly used for cutaneous melanoma, moving into, say, a two-to-four-year time horizon. And so therefore, getting used to what are these side effects, how do you manage them in an ambulatory practice for solid tumor, etc., is going to be something everyone's going to have to learn how to deal with, but I don't think it should be something that people should be afraid of. One thing that we've seen with these molecules so far is that their kinetics of treatment effect do look slightly different than what we see with more classic oncology therapies. These drugs have a long-term benefit but doesn't always manifest as disease regression. So, we commonly see patients will have stable disease, meaning their tumor stops growing, but we don't see that it shrank a lot, but that can turn into a very meaningful long-term benefit. So that's something that we're also, as a community, going to have to get used to. It may not be the case we see tumors shrink dramatically upfront, but rather we can actually follow people with good quality- of-life over a longer period of time. Where is the field going? You mentioned tarlatamab in small cell lung cancer, and I think we're only going to see more of these as appropriate tumor antigens are identified in different tumors. And then the other piece is these CD3 engagers generally rely upon some kind of engagement with a T cell, whether CD3 engagers, and so they can be TCR or T-cell receptor-based therapies, although they can be also SCFV-based. But that then requires new biomarkers, because TCR therapy requires HLA restriction. So, understanding that now we're going to need to profile patients based on their germline in addition to the genomics of the tumor. And those two things are separate. But I would argue at this point, basically everybody with cutaneous melanoma should be being profiled for HLA-A(*)0201, which is the major T-cell receptor HLA haplotype that we would be looking for, because whether or not you can get access immediately to tebentafusp, but therefore clinical trials will become more and more important. Finally, in that T-cell receptor vein, there are also T cell receptor-transduced T cells, which are also becoming of relevance in the oncology community and people listening will be aware in synovial sarcoma of the first approval for a TCR-transduced T cell with afamitresgene autoleucel. And in melanoma, we similarly have TCR-transduced T cells that are coming forward in clinical trials into phase 3, the IMA203 PRAME-directed molecule particularly. And leveraging our prior conversation about TILs, we're going to have more and more cellular based therapies coming forward, which is going to make it important to understand what are the biomarkers that go with those, what are the side effect profiles of these, and how do you build your practice in a way that you can optimally get your patients access to all of these different treatments, because it will become more logistically complicated, kind of as more of these therapies come online over the next, like we said, two to four years kind of time horizon. So, it's very exciting, but there is more to do, both logistically and scientifically. Dr. Ryan Augustin: That's excellent. Thanks, Jason, and thank you so much for sharing your great insight with us today on the ASCO Daily News Podcast. Dr. Jason Luke: Thanks so much for the opportunity. Dr. Ryan Augustin: And thank you to our listeners for your time today. You will find links to the abstracts discussed today in the transcript of this episode, and you can follow Dr. Luke on X, formerly known as Twitter, . And you can find me, . Finally, if you value the insights that you hear on the ASCO Daily News Podcast, please take a moment to rate, review, and subscribe wherever you get your podcasts. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions,...
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Personalizing Locoregional Treatment for Breast Cancer
10/17/2024
Personalizing Locoregional Treatment for Breast Cancer
Dr. Dionisia Quiroga discusses emerging approaches to personalizing locoregional treatment for breast cancer with Drs. Walter Paul Weber and Charlote Coles, who share insights on tailoring axillary surgery, escalating lymphatic surgery, and implementing hypofractionated radiotherapy. TRANSCRIPT Dr. Dionisia Quiroga: Hello, I'm Dr. Dionisia Quiroga, your guest host of the ASCO Daily News Podcast today. I'm a breast medical oncologist and assistant professor in the Division of Medical Oncology at the Ohio State University Comprehensive Cancer Center. On today's episode, we'll be discussing emerging approaches to personalize locoregional treatment for patients with breast cancer, including many of the latest updates on axillary surgical staging, lymphatic surgery, and evidence-based radiotherapy in the treatment of breast cancer. We're very fortunate to have joining me today for this discussion Dr. Walter Paul Weber, a professor and head at the Division of Breast Surgery at the University Hospital Basel in Switzerland, and Dr. Charlotte Coles, a professor of cancer clinical oncology and the deputy head of the Department of Oncology at the University of Cambridge in the United Kingdom. Our full disclosures are available in the transcript of this episode. Dr. Weber and Dr. Coles, it's very wonderful to have you on the podcast and thank you so much for being here. Dr. Walter Paul Weber: Thank you very much for having us. Dr. Charlotte Coles: Thank you. Dr. Dionisia Quiroga: Now, for many decades prior, axillary lymph node dissection has very much been our standard of care. But recently, axillary surgeries have been able to be gradually deescalated to spare some of our patients from relative and relevant long-term morbidity. There are still some indications in which axillary lymph node dissection still remain. And therefore, we still see breast cancer-related lymphedema, a well-known sequela of the axillary surgery to continue to be prevalent. And I think it's important also to acknowledge that today there's about an estimated 1.5 million cancer survivors who deal with breast cancer-related lymphedema. Now, Dr. Weber, at the recent ASCO Annual Meeting, you and your co-presenters tailoring axillary surgery, escalating lymphatic surgery and implementing evidence-based hypofractionated radiotherapy to really personalize locoregional treatment for people who've been diagnosed with breast cancer. And in addition to that, you and Dr. Coles have also . Can you tell us about some of the recent advances in axillary surgery and what are really the current indications for axillary dissection? Dr. Walter Paul Weber: Yes, I'm happy to do so. So as you've said, we've known for a while that we can omit axillary dissection in patients with clinically known negative breast cancer and negative sentinel nodes. We've known for about 10-15 years that we can omit axillary dissection in patients with one or two positive sentinel nodes in many patients. But what we've learned recently is that we can omit axillary dissection also in patients with one or two positive sentinel nodes who have larger primary tumors who undergo mastectomy or who have extranodal extension. This is a landmark trial that was published just a few months ago, the trial that established this. The remaining indications for axillary dissection are situations where you expect a heavy tumor load in the axilla. For example, when you have more than two positive sentinel nodes or you have a patient with clinically node-positive breast cancer who undergoes upfront surgery and has palpable disease or significant disease on imaging. Patients with locally advanced breast cancer, who are considered by some to be not eligible for nodal downstaging, such as patients with CN2, CN3 disease or CT4 breast cancer. And then the big group of patients who have residual disease after neoadjuvant chemotherapy in the nodes, standard of care is still axillary dissection. But we now have some real-world evidence that it's safe for selected patients with low volume nodal disease left in the nodes, mostly isolated tumor cells, to not undergo axillary dissection. So these are the remaining indications today. Dr. Dionisia Quiroga: Can you speak to situations where maybe even sentinel lymph node biopsies might be omitted? I know you spoke a little bit about the use of imaging in your work. Dr. Walter Paul Weber: Yes, this is correct. So, we started about maybe 7 or 8 years ago to omit sentinel lymph node biopsy in older patients above 70 years of age who have luminal disease, according to recommendations from the Choosing Wisely initiative. And now indeed there are several ongoing randomized trials that investigate if axillary imaging can replace surgical staging of the axilla. And the first of these trials was published recently, the trial with almost 1,500 patients, who underwent breast conserving surgery and had small tumors and all had a negative ultrasound of the axilla. And then they were randomized into a sentinel lymph node biopsy versus no axillary surgery. And that trial showed non-inferiority of the omission of sentinel lymph node biopsy in these patients. Now, it's a bit early to roll out the Choosing Wisely recommendation to all patients who have a negative ultrasound. The SOUND trial showed that about 14% had a false-negative ultrasound. So, in the control arm, they actually did have a positive sentinel node. And in patients where that one missed sentinel node makes a big difference in terms of systemic therapy, most experts would still recommend sentinel biopsy, and these are patients mainly with HER2-positive or triple-negative breast cancer or premenopausal patients or those who have G3 biology. Dr. Dionisia Quiroga: I think you bring up a very important point. Coming from the side of a breast medical oncologist, we're also very interested to see what these studies show because many of our practices are based on what we find out from our lymph node biopsies. So, I think a lot of interesting prospective studies to look at in the future. Dr. Walter Paul Weber: Absolutely. Dr. Dionisia Quiroga: One other topic we wanted to discuss was local regional management of stage four disease and particularly oligometastatic disease. And this is not a new topic of interest. We've been speaking about this for a long time in breast cancer management, but can you address some of the axillary management strategies that you currently use for stage 4 disease? Dr. Walter Paul Weber: Yes, it depends on your intention. If your intention is to cure the patient, then you would apply all the locoregional standards that apply in the curative setting, which means lymph node biopsy with or without axillary dissection. Now in a palliative situation, it's individualized. Very often you don't touch the axilla and sometimes you open it and just remove palpable disease, trying to minimize morbidity. The question of which intent you should follow is controversial; three out of the four randomized trials did not show a benefit for locoregional surgery in patients with de novo stage 4 disease. However, experts seem to disagree. The last St. Gallen consensus recommendation was in favor of the curative intent in such a patient with oligometastatic disease; 85% favored the curative intent. So there's a bit of discrepancy there, but everybody would agree, and this is what has been done in all of these trials, that if you try to cure the patient, then you should apply the curative standards of sentinel and axillary dissection that you use also in early-stage breast cancer. Dr. Dionisia Quiroga: Thank you. Now, moving on from surgical axillary management and more into lymphedema prevention and treatment. Can you speak to some of the promising advances that have happened in this field? Dr. Walter Paul Weber: Yes, so the best way to prevent lymphedema still is not to perform axillary dissection, which is the number 1 risk factor, which is all the axillary surgery de-escalation research that we've just discussed is all about. Prevention of lymphedema is one major aim of this. Now, once you indicate axillary dissection and you expect the patient to be at high risk – for example, if there are other risk factors such as obesity or neoadjuvant chemotherapy or extended regional nodal radiotherapy, then indeed there are emerging techniques that really seem to work. There is some evidence supporting it, which is categorizable as immediate lymphatic repair basically or bypass. And that is usually in a patient who undergoes axillary dissection, and also undergoes axillary reverse mapping. That allows the identification of the lymph nodes that are probably most relevant to the drainage of the lymphatic fluid from the arm. And then you can try to spare these. But if you decide, and this is effective, there is a consistent body of evidence, not phase 3 trials, but pretty consistent evidence that axillary reverse mapping works just by sparing the identified nodes. But if you decide that you have to remove these nodes as part of the radical concept of axillary dissection, then immediate lymphatic repair is also increasingly being done and is also supported by consistent evidence, even some single center randomized trials, low volume, but all consistently showing quite a striking benefit of this immediate lymphatic repair technique. There are different ways you can do it. You can either use it the microscope, and it's being done by the plastic surgeons, but it's also a simplified technique described that can be used by specialized general and breast surgeons. Both techniques seem to really work based on what we know from the studies, but also based on our common sense. Dr. Dionisia Quiroga: You talked about the procedures that can be offered to patients at time of breast surgery. And unfortunately, many of our patients maybe did not have the availability of those techniques when they undergo their initial breast cancer treatment. Once lymphedema is developed in a limb following breast cancer diagnosis, can you speak to other interventions that can be done to potentially help mitigate lymphedema? Dr. Walter Paul Weber: Right, so for patients who no longer benefit from or wish to further undergo conservative treatment of lymphedema, there are emerging procedures that are now out of my personal comfort zone because they're being performed by plastic surgeons; they use the microscope. There are two groups, the lymphovenous anastomosis and then the real vascular lymph node transfer as a free flap. And both of these procedures (there are no randomized trials yet published), but some really good ones are on the way and currently recruiting based on the evidence we have, which is over 20 observational studies all consistently again showing a benefit in terms of what you can measure in terms of centimeters or with a bioimpedance spectroscopy, or also when you ask the patients, you see quite some dramatic improvements by both of these techniques. And it's increasingly being done. Personally, I strongly believe that it works based on everything we know and understand from lymphedema development, but also prevention and treatment. So I am quite sure that in 5-10 years, we will see much more surgical treatment of patients with lymphedema by highly specialized plastic surgeons. Dr. Dionisia Quiroga: That's my hope as well. Now, another important component of local regional treatment we know is of course radiotherapy. And there have been many incredible advances in breast radiotherapy over the past decades, which has really improved cancer control and decreased side effects in our patients. Dr. Coles, you've led practice changing radiotherapy trials in the past and your research has really influenced international hypofractionation policy. Can you expand upon the emergence of hypofractionated radiation for breast cancer and the effects that it can have on our patient care? Dr. Charlotte Coles: Yes, so thank you very much, Dr. Quiroga. So I think the first thing to say is that radiotherapy hypofractionation isn't a new concept. And in fact, the breast radiotherapy hypofractionation trial started around three decades ago. And the rationale for this was the hypothesis that breast cancer is as sensitive to fraction, which is the treatments that we give, we split it into fractions, is sensitive as late responding tissue. So what does this mean? It means that the small traditional 2 Gy fraction spare tumor and normal tissues equally, so there's no advantage. So therefore, fewer fractions with a larger dose per fraction are worth testing. The problem is there's a concern that hypofractionation might increase the risk of side effects, and that includes the really important one we've been talking about, lymphedema. But we can reduce this risk by reducing the total radiotherapy dose over the whole course. But the question was by how much. So that's why randomized trials were needed. And there's been really high-quality trials with robust radiotherapy quality assurance, and they've been designed in partnership with patients. So just a very quick run through: A landmark trial was the trial. And this was a pragmatic design that compared 50 Gy in 25 fractions, which was commonly used in the south of the country with 40 Gy in 15 fractions, which was used at that time in the north [of the UK]. And this recruitment was around in the late 1990s and early 2000s. What we knew was that the three-week regimen was actually radiobiologically lower dose. And therefore the results that we got, it wasn't surprising that the 40 Gy was actually gentler on the normal tissue. So that's an advantage for patients. But what was surprising was it wasn't gentler on the tumor and non-inferiority was proven. So this suggests that overall treatment time is important for local control. So this fits with hypofractionation. Way back in 2009, 40 Gy in 15 fractions to both the breast and regional nodes became standard of care in the UK. But five-week nodal and actually breast as well remained standard of care in many countries for many years after that, a little bit to do with the fact that there were few patients treated in the START trial in terms of treating the node. So more recently we've had more randomized trials, particularly for nodal radiotherapy. And this includes the recently reported Danish trial and also the French trial, which was actually presented at ESMO in Barcelona a couple of weeks ago. So we've now got data for over 5,800 participants in really high-quality randomized trials testing three weeks and five weeks of nodal radiotherapy. And there's no statistically significant difference in late normal tissues for any of these, including lymphedema. So certainly, in my opinion and reflecting in many of the European guidelines, five-week radiotherapy is no longer indicated and three-week nodal radiotherapy is the international standard of care. So, in conclusion, the question is can we hypofractionate even further? So the UK trial tested three weeks with two different dose levels of one week for the whole breast. Primary endpoint was ipsilateral breast tumor response. More than 4,000 patients participated and this was reported in 2020 with a median follow -up of six years and this was very timely because this is a time of COVID and the results showed non-inferiority for local control with similar late normal tissue side effects and we've also had other results from the UK trial which shows that we can safely deliver a small, highly targeted team of boost simultaneously with the whole breast in all in three weeks. Finally, these two landmark trials have come together for the design of the UK FAST-Forward Boost Study led by my colleague Dr. Anna Kirby. And this is going to test three-week simultaneous integrated boost with two levels of one-week simultaneous integrated boost. And it's also going to test the safety of 5 fraction nodal radiotherapy, including the internal mammary node. Primary endpoint is ipsilateral breast tumor response, multiple normal tissue endpoints, including patient-reported outcomes of course, and the target recall is large with 4,800 participants. So, in summary, I would say that hypofractionation is efficacious, has similarly reduced toxicity. Importantly, it reduces patient burden and that's incredibly important because it means that people can get back on with their life quicker. It reduces health system costs, and also increases equity of access. So we really do need to continue to recruit and design high quality trials in this area. Dr. Dionisia Quiroga: Thank you, Dr. Coles. I think you highlight that there really aren't any downsides to looking into hypofractionated radiotherapy at this point. So excited to see what those future trials yield. And I want to thank you so much, Dr. Weber and Dr. Coles for sharing your valuable insights with us today on the ASCO Daily News Podcast. Dr. Walter Paul Weber: Thank you very much. Dr. Charlotte Coles: Thank you. Dr. Dionisia Quiroga: And thank you to our listeners for joining us today. Our listeners will find a link to our guests’ from the ASCO Educational Book in the transcript of this episode, as well as a link to their from the most recent ASCO Annual Meeting. Finally, if you value the insights that you hear on the ASCO Daily News Podcast, please take a moment to rate, review, and subscribe wherever you get your podcast. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. Find out more about today’s speakers: Follow ASCO on social media: Disclosures: Dr. Dionisia Quiroga: No relationships to disclose Dr. Walter Weber: Honoraria: MSD Dr. Charlotte Coles: No relationships to disclose
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How Are Cancer Centers Navigating IV Fluid Shortages and the Devastation of Hurricane Season?
10/09/2024
How Are Cancer Centers Navigating IV Fluid Shortages and the Devastation of Hurricane Season?
Dr. Merry Jennifer Markham and ASCO CMO Dr. Julie Gralow discuss the shortage of IV fluids and other challenges that have emerged from Hurricane Helene as high-risk areas brace for impact from another storm, Hurricane Milton. In a conversation with Dr. John Sweetenham, they highlight resources for oncologists and patients and stress the importance of crisis preparedness at cancer centers. TRANSCRIPT Dr. John Sweetenham: Hello, I'm Dr. John Sweetenham, the host of the ASCO Daily News Podcast. Hurricane Helene made landfall on September 26th in Florida and raged over parts of Georgia, North Carolina, Tennessee, and Virginia. The disaster has claimed over 230 lives. Many people are still missing, and many thousands are homeless. The hurricane has exacerbated the nation's IV fluid shortage, and some health care facilities have begun implementing conservation strategies. Meanwhile, Hurricane Milton, another powerful hurricane, is expected to wreak havoc as Florida braces for back-to-back hurricanes in parts of the state. On today's episode, we'll be discussing the impact of these events on cancer care, including the shortage of IV fluids. Joining me for this discussion is Dr. Merry Jennifer Markham, a professor and research lead for the University of Florida Health Cancer Center's Gynecologic Cancer Disease Site Group. I'm also delighted to welcome Dr. Julie Gralow, the chief medical officer at ASCO. Our full disclosures are available in the transcript of this episode. Merry Jennifer and Julie, many thanks for joining us for the podcast today. Dr. Julie Gralow: Thanks for having us, John. Dr. Merry Jennifer Markham: Yes, thank you. Dr. John Sweetenham: Merry Jennifer, can you tell us your exact location today and how your patients and institution have been impacted by Hurricane Helene so far? Dr. Merry Jennifer Markham: I am in the north-central part of Florida. I'm in Gainesville, Florida, which is the home of the University of Florida, where I practice medicine. And we are physically about two hours north of Tampa, two hours north of Orlando, and about an hour and a half southwest of Jacksonville. So right in the middle. And we are currently in the track for the next storm. Helene was a really a devastating storm and what our area felt was primarily what we tend to get in most storms here in the center part of the state, which is a lot of rain, a high risk for tornadoes and a lot of power outages. And one of the challenges that my center in particular faces, and some of the local cancer centers and cancer care providers around in our region, is our patients live in a very rural population. So for those patients who are not in downtown Tampa, downtown Orlando, for example, the rest of the state, especially in the northern part, tends to be quite rural. And so many of our patients had loss of power and a lot also in those regions are on well water. And so when the power goes out, it's not just a matter of losing air conditioning and losing access to Wi-Fi, but it's also losing access to fresh, clean water. Dr. John Sweetenham: Wow, it sounds very challenging. And of course, there are growing concerns at the moment about the IV fluid shortage that's being caused by Hurricane Helene and some hospitals have already begun conserving IV fluid supplies. Can you tell us a little bit about your experience with IV fluid shortages so far and whether you are anticipating other medical supplies to be affected by these shortages in the days or weeks ahead? Dr. Merry Jennifer Markham: Well, the IV fluid shortage has definitely impacted us. I happened to be on service last week and this week, and, working in the inpatient setting right now on our oncology inpatient service, we are having to conserve all IV fluid, and the entire hospital has been directed to find workarounds. And it's not always easy to find workarounds. It has definitely impacted our ability to safely discharge patients and to sometimes adequately give people the hydration, for example, that they need. A lot of the cancer therapies, we also use intravenous fluids to pre-hydrate or post-hydrate, and it's a challenge when we also need to conserve those IV fluids for other critical needs in the hospital setting. And for me, the shortage is really being felt in that inpatient setting right now. I think that other centers are still going through. And what we learned from the pandemic is that when there is a shortage, and it's not just actually the pandemic that we learned this from, but from any of the supply chain issues that we've had is then centers start buying it up, right? And so there's a bit of a panic in the healthcare field where if we're short on IV fluids, then well, now everybody is buying up the remaining IV fluids. And I think that does impact, unfortunately, everyone in a negative way. Dr. John Sweetenham: Yeah, I was reading some news reports earlier today actually about stockpiling and the efforts that some of the companies are going to control their outward going supplies to hopefully prevent some of that stockpiling. As if life for you and your patients wasn't difficult enough, you now have the prospect of another major storm, Hurricane Milton, which is headed your way and predicted to be among the most destructive hurricanes ever on record in central Florida. What are your major concerns in the days ahead and for what this might mean for the longer-term impact on cancer care? Dr. Merry Jennifer Markham: It's concerning. We are definitely in the path and the hospital is currently in sort of crisis preparedness mode. My concerns are always for the patients and for the teams caring for them, especially in my current work in the inpatient setting, these last two weeks. Our patients, because they come from such rural areas, are going to lose power. We will probably lose power, but we have generators at the hospital system, so we're a bit protected. But in many of these areas around us, there will be high winds, there will be flooding for those along the coast, and just the access to a clean, safe living environment is going be in jeopardy during and after the storm. What concerns me about our patients in particular with cancer are the ones who are undergoing treatments and who may have complications and may not be able to reach the help that they need during the storm or in the days following. I have patients that I have been caring for in the last week who still haven't recuperated, still haven't recovered their power from Helene. And so this is just adding insult to injury. I think that the impact on medical supplies is still to be seen. The challenge is always when a storm wipes out the major manufacturer of a particular product, I think we'll probably continue to have the IV fluid shortages. And I think it's just going to be a matter of preparing for a worst-case scenario but being prepared. Dr. John Sweetenham: Absolutely, yes. I think you've already alluded to the fact that as each of these successive disasters affect the country, we sort of learn a little bit more each time. And ASCO has provided on its website for disaster assistance. We'll share a link in the transcript of this episode to connect providers and patients to the Hurricane Helene-specific resources, government agencies, and also to patient and caregiver groups. Julie, as ASCO's chief medical officer, you've been speaking to stakeholders across the oncology community, as well as many groups that are responding to the crisis. What's your message to ASCO members and patients and caregivers today? Dr. Julie Gralow: Our main message at ASCO to our members, our immediate outreach was, ‘We're thinking of you, we're here for you, let us know how we can help you.’ As you've already said, we've learned from past natural disasters. We had Katrina way back when, specifically for the IV drug shortages. We had a shortage back in 2014 due to a problem in Norway, but in 2017 we had another hurricane, Maria, which impacted Puerto Rico and majorly impacted IV fluids. So we have knowledge that we've gained, we as the whole medical community have gained on how to adapt and where we can hydrate orally or, you know, give electrolytes and where we can reserve things. I think one of our main messages at ASCO is that while our members are those who treat patients with cancer, we use IV fluid everywhere in the hospital, the operating room, the emergency room, the ICUs. We are all in this together, and so, while we have some specific things related to oncology where we can probably save fluid and conserve, etc., we need to work as a whole team, a whole body to protect each other. So, if you're developing an incident management team at your institution or whatever, it needs to be multidisciplinary. We all need to be protecting each other's patients as well. Dr. John Sweetenham: Yeah, absolutely. Just briefly on the subject of IV fluids, do you think it will be necessary to mitigate the IV fluid issue by bringing IV fluids in from other countries? Dr. Julie Gralow: I think the full impact, how long this is going to be, how much we can ramp up domestically, is really yet to be seen. all looking at this. So Baxter, which supplies about 60% of hospital IV fluids and peritoneal dialysis solutions, it was flooded essentially at their big plant in North Carolina. They have several other plants in the US and some internationally too. So the question will be, did those other plants also make IV fluids? Can they be ramped up? There are another at least two companies in the U.S. that make IV fluid. What will be their ability to ramp up? we already do. Baxter says they've already; I think Merry Jennifer alluded to this, they've already instituted a mitigation strategy where they're placing products on a protective allocation. So they are really trying to protect against stockpiling, et cetera. The FDA has come out and said it will consider reviewing potential temporary imports. It also is looking at expediting reviews once the manufacturing lines are up and going again, it will expedite those as well. And they're looking at alternative providers. IV drugs are officially on the FDA's drug shortages list, and that allows certain flexibilities, I am told, in terms of, for example, being able to make sterile IV fluids at a local site if it's on the FDA drug shortage list. And there are some other things that go along with it. It's really hard to find on the FDA drug shortage site. You have to use the right keyword. You have to look it up under sodium chloride for injection. You can't look up saline on it. But it is now there. I think it just got placed in the last 24 hours or so. And so that does allow some additional flexibilities. Dr. John Sweetenham: Okay, great. Thank you. So a question for both of you. A couple of years ago, we covered the on this podcast. And Helene and Milton will presumably not be the last storms which are going to disrupt cancer care and undoubtedly cause a great deal of hardship to many people, both our patients and our caregivers, those who are giving care. Climate change probably predicts that this is going to be an ongoing event. You know, these events have undoubtedly tested the disaster preparedness plans of cancer centers in the region. I wonder how you would assess the readiness of cancer centers to respond to these big disasters, which are undoubtedly in our future, and what areas of care do you think would need more attention? Merry Jennifer, maybe I'll start with you for that question. Dr. Merry Jennifer Markham: I think cancer centers, working within their health system, really should have a disaster preparedness plan in place. Here in Florida, I am very used to the preparedness plans that my system has developed really for every hurricane season. And because hurricane season is from June to the end of November, we are fully aware of this plan and can start taking action. And a lot of that deals with when do we close particular clinics? What areas do we need to prioritize? How do we make sure we've got proper staffing? I think that is the type of thing that cancer centers should have really in a written protocol – here's what we do when this news is coming out of the weather center or something along those lines. One of the challenges that we face, and I think probably this is, I guess I'm going to speak for all of the Southeast who is in the, you know, a hurricane, you know, risk area is disaster fatigue. And I think that is a problem. I don't know if it's unrecognized. I fully recognize it because I feel it. think earlier when we were talking, you mentioned Hurricane Ian and I don't even remember, Ian, because we have so many of these hurricanes. Every year there's a new one or multiple, and they all seem to bring the same kind of disasters. Usually on a local scale; I think what we've seen with Helene has just been so massive across multiple states. But the fatigue, that disaster fatigue, I think can lead people to become a little lax. And there is a risk. If we think of all of us as caregivers for all of our patients and for the physicians and teams practicing, it's easy to become numb and tired and worn out of preparing for these disasters. So, I think it's very important that this stays top of mind and that centers are preparing and also cognizant of the fact that fatigue is also a real potential issue. Dr. John Sweetenham: Right, thanks. Julie. Dr. Julie Gralow: We learn from each event and the events have come closer and closer, at least the hurricanes have. I totally agree with Merry Jennifer that we can't have disaster fatigue. Each one does have its unique component. For example, Helene, while we could see the path and it didn't stray that far from its path, did we really expect that this region, this Appalachian region would be the one most impacted? They're nowhere near a coast, you know, it was a bunch of flooding and dams breaking, so each one is different. From ASCO's perspective, we've learned and we've developed both a domestic crisis response team and plan, as well as an international one. And it's, besides hurricanes and major storms, you know, we've had fires and earthquakes and for our international crisis response team, we've been dealing with conflict and getting cancer care delivery in regions of conflict. So by having a team formed, by learning from each event, and then quickly communicating with members when we can get ahold of them on the ground as to what the real situation is and how we can help, I think we've gotten stronger over the years. It's still, with each one, it's horrible for the people on the ground and our job really is to best support our members and their patients as they're trying to get their lives back together. Dr. John Sweetenham: Thank you. So, I think that winds up most of the issues we wanted to cover today. And I wanted to thank you both Dr. Markham and Dr. Gralow for being on the podcast today and sharing your insights on what is, of course, an extremely challenging situation. I should remind listeners that they will find links to for providers and patients on the ASCO website at asco.org. You can also follow Dr. Markham on X. Her tag is at , where she has been sharing key information and resources. And Dr. Julie Gralow will continue to share resources on X. You can find her . We want to wish you, Merry Jennifer, and our many colleagues in the affected regions, all the best during what we know are very challenging times. Dr. Merry Jennifer Markham: Thank you. And thanks to you, Dr. Gralow, for sharing your insights and thoughts with us today as well. Dr. Julie Gralow: Thanks for having us, John. Dr. John Sweetenham: And thank you to our listeners for your time today. If you value the insights that you hear on the ASCO Daily News Podcast, please take a moment to rate, review and subscribe wherever you get your podcasts. Disclaimer: The purpose of this podcast is to educate and inform. It is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. The guests on this podcast express their own opinions, experience, and conclusions. Guest statements do not necessarily reflect the opinions of ASCO. Mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. Find out more about today’s guests: Follow ASCO on social media: Disclosures: Dr. John Sweetenham No relationships to disclose Dr. Merry Jennifer Markham: Stock and Other Ownership Interests (Immediate Family Member): Pfizer Research Funding (Inst.): AstraZeneca, Merck Dr. Julie Gralow: No relationships to disclose
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Key Takeaways From the 2024 ASCO Quality Care Symposium
10/03/2024
Key Takeaways From the 2024 ASCO Quality Care Symposium
Dr. Fumiko Chino and Dr. Raymond Osarogiagbon share highlights from the 2024 ASCO Quality Care Symposium, including patient perspectives and compelling research on topics like equity, supportive care, survivorship, and technology and innovation. TRANSCRIPT Dr. Fumiko Chino: Hello and welcome to the ASCO Daily News Podcast. I'm Dr. Fumiko Chino, an assistant professor in radiation oncology at the MD Anderson Cancer Center. On today's episode, we'll be highlighting key research and compelling perspectives that were featured at the 2024 ASCO Quality Care Symposium. I was delighted to serve as the chair-elect of this meeting's program committee, and I'm overjoyed to welcome its chair, Dr. Raymond Osarogiagbon, to the podcast today. He is the chief scientist at the Baptist Memorial Health Care Corporation and the director of the Multidisciplinary Thoracic Oncology Program at the Baptist Cancer Center in Memphis, Tennessee. Our full disclosures are available in the transcript of this episode, and we've already agreed to go by our first names for this podcast today. Ray, it's so great to speak with you today. Dr. Raymond Osarogiagbon: Thank you, Dr. Chino, and thank you for letting me call you by your first name. Dr. Fumiko Chino: I think both of our names are complicated enough and so I appreciate the level of familiarity that we've had with each other during the planning process for this fantastic meeting. Now, the Quality Care Symposium featured some really compelling research on very timely topics that address a wide range of issues in cancer care, including quality, safety, equity, supportive care, survivorship, and technology and innovation. Wow, what a lot to cover. Ray, do you mind sharing with me some of the key sessions that really stood out for you? Dr. Raymond Osarogiagbon: Yes, Fumiko, this was such a great conference. Our tagline this year was ‘Driving Solutions, Implementing Change.’ We had more than 700 attendees in person and virtually. The Symposium featured many fantastic speakers, oral abstracts, posters, and we had networking opportunities for junior colleagues to interact with leaders in the space. We had conversations that will surely inspire future collaborations to improve quality cancer care. We had patients, advocates. I was inspired by the patient perspectives that were presented, learned a lot. And I really felt like this enhanced our understanding of some of the key issues that we see in our clinics. I was honored to be able to introduce my dear friend, Dr. Ethan Basch from the University of North Carolina, Chapel Hill, who received the Joseph Simone Quality Care Award this year. Dr. Basch gave a talk titled, “.” In his talk, which received a standing ovation, Dr. Basch tracked his personal development from fellowship training at Memorial Sloan Kettering through a junior faculty position at the same institution under the mentorship of Dr. Deborah Schrag, and ultimately to his current position as chair of oncology at the University of North Carolina and as physician-in-chief at the North Carolina Cancer Hospital. In parallel, with the evolution of the patient-reported outcomes movement that he has been right at the heart of, and also the evolution of cancer care delivery research into its current position of prominence in oncology. That was a spectacular talk, and it rightly received a standing ovation. We also had presentations and panel discussions that addressed , which provided wonderful, diverse perspectives on the evidence-based approaches to patient navigation and cancer care. And a wonderful session on the that looks at the current challenges in the pharmaceutical supply chain. [was also covered], and we talked about and . Patient care perspectives were just incredible. So, Fumiko, as an equity researcher, I really want to hear your key takeaways from some of these discussions. Dr. Fumiko Chino: I have to say, I was so impressed with not just the science that was presented, but also the passion from some of our educational speakers who are really speaking from their expertise and their commitment to try to continue to advance equity in the field of cancer care. And as someone who is still a relatively junior researcher, I feel that the work that I've done over the last decade has really been built on the shoulders of these giants. Just harkening back to you had mentioned that Dr. Basch essentially gave an of his career and as a young health services researcher, I've been really impressed about how generous the leaders in the field have been with their time not only to discuss their research at this conference, but also to talk to trainees and fellows and junior researchers and really share the wealth of their knowledge. In terms of equity research presented at the conference though, I was really struck by the we were able to provide about the best care to provide to LGBTQ patients. Dr. Mandy Pratt-Chapman actually gave a really lovely that was always centered in the patient. It really taught me a lot about what the best practice is to not just collect SOGI data to improve research, but also that there's billing codes that can actually help decrease the chance that a patient may be misbilled based on anatomical misunderstanding of their gender identity. I was very impressed about the capacity for some of our researchers to really think outside of the classic box for DEI research. So not just race as a social construct, ethnicity, but also health literacy barriers. There was a fantastic analysis looking at a randomized control trial () that actually showed that patients with low health literacy actually got the most benefit from a digital intervention that involved text reminders to increase adherence. And the flip side of health literacy is that we know that the specific interventions that we do really need to be explicitly designed for the populations that they will be implemented on. Dr. LoConte actually had the results from her intervention looking at a radon mitigation indigenous communities (). And I was so impressed about her commitment to the process of listening to the communities and what their needs were, what their concerns were, and then implementing this community led intervention that helped mitigate the radon risk from many households where the actual radon levels were surprisingly high, beyond what they were that what they were anticipating. And so, it's all of these manifestations of how do we actually improve research, how do we advance the field and further the conversation in an era when it seems like DEI is really under attack. Well, I know you've long been an advocate for equity for lung cancer. And I know that you were actually involved in one of the amazing abstracts being presented that was essentially a decade- long QI (quality improvement) project to try to improve standards of care for lung cancer in a high-risk community in the Mississippi Delta (). And it actually showed over time that this surgical pathology intervention actually was able to improve overall survival for lung cancer. I know that this is part of the work that you've been doing for years. Can you talk a little bit about what was presented within the Symposium specifically for lung cancer, including your study? Dr. Raymond Osarogiagbon: Yes, Fumiko. The member of my team, Olawale Akinbobola, who has an MPH that he actually acquired within my research team I'm proud to say, had the wonderful opportunity to present this on implementing surgical quality improvement, and in parallel, pathology quality improvement in a well-defined population involving 14 hospitals in seven health care systems across five contiguous hospital referral regions in Mississippi, Arkansas, and Tennessee, at the heart of the Mississippi Delta region. So Olawale showed that over the course of four consecutive 5-year time spans, the quality of surgery has improved from a time when using current objective benchmarks of surgical quality, anywhere from 0-5% of resections met these current standards. So basically, applying today's standards, but retrospectively, to where, as the interventions took hold, we now got to a point where about 67% of the sections in this population now attain surgical quality. And we saw in sequential lockstep with that, that the hazard of death among these patients has significantly decreased. All the way, I think using the first 5 years as the reference, the hazard reduced about 64%. Really amazing to see. But you know, there were other fascinating abstracts. There was a randomized controlled trial, , that demonstrated that olanzapine therapy was actually way more effective than prochlorperazine for patients with intractable chemotherapy-induced nausea and vomiting. I found that very compelling abstract. And then there was Elyse Richelle Parks who reported on the effectiveness of a virtual sustained tobacco treatment, [a clinical trial conducted by ECOG-ACRIN within the NCI Community Oncology Research Program]. This tobacco control intervention is remotely administered using technology that was presented in today's session on . That too was amazing to behold. Dr. Fumiko Chino: I've been so impressed within my, at least my interactions with the Quality Care Symposium for the last several years about how this meeting really creates the perfect space for this type of science, which can be frankly underappreciated at other meetings. You know, something like a QI project, a quality improvement project leading to an overall survival benefit or a trial like you mentioned, the , which specifically had a quality-of-life endpoint, meaning that patient quality-of-life was a compelling justification for optimal nausea control. These things are really underappreciated sometimes at the larger scientific meetings, and the ASCO Quality Care Symposium is really where these types of studies and this type of research really shines; it's very patient-centered. You mentioned the patient voice being a really integral part, and I certainly agree with that. The entire meeting started with a session featuring a phenomenal patient advocate, , who was diagnosed with de novo stage 4 metastatic breast cancer. And her experience with her primary treatment really highlighted some of the care gaps that Black women experience in their journey with breast cancer. And it really charged her to actually create a patient navigation organization to help Black women with breast cancer get more evidence-based care to make sure that they were actually asking the questions that needed to be asked, getting the resources that they qualified for, and making sure they were getting evidence-based care. Now shifting gears a little bit, in oncology and across medicine, there's actually been some major challenges with drug shortages. I'd like to ask you about the session that was featured to inform oncologists about what we need to know about navigating the complexities of the pharmaceutical supply chain. Do you mind sharing highlights from that discussion, Ray? Dr. Raymond Osarogiagbon: I will, Fumiko, but before I do that, I have to follow up on what you said about Jamil Rivers, the breast cancer survivor and advocate who leads the . She made the statement of the meeting [in my opinion] when she said, “A hospital encounter for a Black woman is like a Black man being pulled over by the police.” Wow. I mean, that's a direct quote. It suddenly helped me understand my wife's many years-long anxiety whenever she has to deal with encounters with clinicians and health care systems. But about that wonderful on the challenges with the pharmaceutical supply chain. For me, there were two key highlights. One was Dr. Deborah Patt’s discussion on the growing influence of pharmacy benefit managers, PBMs, on the cost and delivery of cancer care. And then there is Jason Weston's of how U.S. generic oncology drug manufacturing has moved almost entirely out of the U.S. with this incredible unrealistic price focus, almost so focused on price competition, almost totally ignoring quality and safety. And paradoxically, that fierce competition has inhibited competition, right? So as the margins have shrunk and all these generic drug manufacturers have moved overseas with little oversight, the supply chain gets disrupted because these companies are not able to invest in processes, in their manufacturing facilities and so on. So, when something goes wrong, all of us become vulnerable. And the other striking thing I learned from Jason was this problem is not new. It is not new. It's been with us for decades. And without comprehensive solutions, unfortunately, it's not going to go away. So, these are some of the examples of things that I would really love the podcast audience to go and check out for themselves. Dr. Fumiko Chino: I will just highlight one additional aspect of that session, which was actually the oral abstract () that was embedded into the session that was specifically about how when during the cisplatin shortage of last year, when that drug was out of stock, which is honestly a very widely available, typically cheap medication, Dr. Jody Garey actually on the fact that the things that were substituted were actually far more expensive, and that actually led to not just people not getting the standard of care due to the drug shortages, but also increased costs. So, the bizarre side effect of the race to the bottom in terms of price competition is the fact that during these shortage periods, there's actually a sharp increase in the overall cost, not just to the administration, but also in terms of payer costs and patient cost sharing. So, it is sort of a lose-lose situation. And that was really highlighted to me by that abstract. And I'm so grateful for the research that really puts these experiences that we see in our clinic, things like drug shortages, in a larger perspective of how things like health policy and reimbursement and some of the nitty-gritty that goes on beyond the scenes in terms of oncology practice really is ending up impacting patient care. Now Ray, is there anything else you'd like to highlight before we wrap up the podcast? Dr. Raymond Osarogiagbon: One I maybe should highlight was the discussion about DEI, which is obviously a contentious topic. And we had Dr. Tawana Thomas Johnson with the American Cancer Society tell us how DEI has evolved from something that everybody seemed like they were eager to support and champion in 2020 to a kind of backlash...how we moved from $5 billion in pledges by corporations to support DEI initiatives in 2020 after the George Floyd murder to now where everybody is wanting to roll things back. And yet in the face of this, wanting to roll things back, wanting to respond to the inevitable backlash, there is this commitment still that some companies have had to DEI and workforce development ideas, so nevertheless, ongoing support. For me, that was a bright spot. Dr. Fumiko Chino: I have to say, as someone who started going to the ASCO Quality Care Symposium as a trainee, I've been really encouraged myself in terms of bright spots for this meeting about the engagement from trainees, from medical students to residents and fellows to early faculty. We even had someone who had just graduated high school ask us one of the questions in a session. And that really highlighted for me that this meeting is a very young meeting. It really is the next generation of health services researchers. And that has always been one of the joys about some of the discussions because I feel like the science presented, the education presented is sparking new collaborations, new research paradigms, new mission driven research for another generation. And it's been just simply phenomenal. Dr. Raymond Osarogiagbon: Yeah, the networking opportunities. Wow. It was such a joy to behold people getting together, breaking off in small clusters, interacting with each other, strangers meeting and hitting it off. I mean, just what a wonderful meeting this is. Dr. Fumiko Chino: Yeah, I have to highlight that. Certainly, at my first ASCO Quality meeting at this point, I think eight years ago, I went to one of those Meet the Expert luncheons, had a great conversation with a phenomenal researcher who I still obviously very much admire. And I was sitting at a table at a Meet the Expert luncheon today. And I just felt so invigorated by some of the conversations that I had with the next generation of researchers about how to define their lane, their passion, and how to continue to advance the field. Thank you, Ray, for sharing your key takeaways from the 2024 ASCO Quality Care Symposium and for leading a truly robust program this year. Dr. Raymond Osarogiagbon: Thank you, Fumiko. This has been a labor of love as you will find when you take on this responsibility for next year's meeting. This has been my pleasure. Dr. Fumiko Chino: Thank you so much. I'm really excited about the program that we're going to start planning in Chicago next year. Everyone listening can mark their calendars for October in Chicago. I really want to thank our listeners for your time today. You will find the links to the sessions and the abstracts that we discussed in the transcript of this episode. And if you value the insights that you hear on the ASCO Daily News Podcast, please take a moment to rate, review, and subscribe wherever you get your podcasts. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. Follow today’s speakers: Follow ASCO on social media: Disclosures: Dr. Fumiko Chino: No relationships to disclose Dr. Raymond Osarogiagbon: Stock and Other Ownership Interests: Lilly, Pfizer, Gillead Honoraria: Medscape, Biodesix Consulting or Advisory Role: AstraZeneca, American Cancer Society, Triptych Health Partners, Genetech/Roche, National Cancer Institute, LUNGevity Patents, Royalties, Other Intellectual Property: 2 US and 1 China patents for lymph node specimen collection kit and metho of pathologic evaluation Other Relationship: Oncobox Device, Inc.
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Key Takeaways From 2024 ASCO Breakthrough
08/22/2024
Key Takeaways From 2024 ASCO Breakthrough
Dr. Lillian Siu and Dr. Melvin Chua discuss the new technologies and novel therapeutics that were featured at the 2024 ASCO Breakthrough meeting. TRANSCRIPT Dr. Lillian Siu: Hello and welcome to the ASCO Daily News Podcast. I'm Dr. Lillian Siu, a medical oncologist and director of the Phase 1 Trials Program at the Princess Margaret Cancer Center in Toronto, Canada, and a professor of medicine at the University of Toronto. On today's episode, we'll be discussing key takeaways from the 2024 ASCO Breakthrough meeting in Yokohama, Japan. Joining me for this discussion is Dr. Melvin Chua, who served as the chair of Breakthrough’s Program Committee. Dr. Chua is the head of the Department for Head, Neck and Thoracic Cancers in the Division of Radiation Oncology at the National Cancer Center in Singapore. Our full disclosures are available in the transcript of this episode. Dr. Chua, it's great to be speaking with you today and congratulations on a very successful Breakthrough meeting. Dr. Melvin Chua: Thanks Dr. Siu. It was really inspiring to come together again to showcase the innovative work of world-renowned experts, clinicians, researchers, med-tech pioneers, and drug developers from around the globe. Our theme this year was inclusivity and thus it was important to bring people together again in the Asia Pacific region and to foster international collaborations that are so important in advancing cancer care. This year, we invited 65 international faculty, of which 55% were from Asia. Also, importantly, we achieved approximately a 50-50 split for male to female representation. These are remarkable statistics for the meeting, and we really hope to retain this for future Breakthrough [meetings]. Dr. Lillian Siu: The meeting featured renowned keynote speakers who shared great insights on new technologies and therapies that are shaping the future of drug development and care delivery. Let's first talk about artificial intelligence and the keynote address by Dr. Andrew Trister. He gave a very interesting talk titled, “.” What are the key messages from his talk? Dr. Melvin Chua: Couldn’t agree with you more, Dr. Siu. Dr. Trister is the chief medical and scientific officer of Verily, a precision health company. He previously worked in digital health and AI at The Bill and Melinda Gates Foundation, and worked at Apple where he led clinical research and machine learning with Apple partners. But perhaps it was really his background and training as a radiation oncologist that was most pertinent as he was able to weave both the components of new AI models and the applications and pitfalls in the clinic to the audience. Dr. Trister provided a very high-level view through the history of AI and showcased the progression of the different AI models and he basically explained between deep and shallow methods as well as deductive logic versus inductive probabilistic methods. He then provided several clinical examples where these models have shown their utility in the clinic, for example, pathology and so forth. At the same time, he illustrated several pitfalls with these models. So overall, I think Dr. Trister's talk was very well received by the audience with several key messages, including the importance of [using] high-quality data as the basis of a good AI model. AI was also addressed in an Education Session that looked at . And we had a panel of experts that highlighted current progress and successes with AI in the clinic, advances with AI assisted pathology for clinical research and precision medicine, large language models (LLMs) for applications in the clinic, and how we could leverage AI in precision oncology. And from this session, I had several key takeaways. Dr. Alexander Pearson [of the University of Chicago] gave a very illustrative talk on how multimodal information across clinical omics, radiological information and multi omics could be used to improve diagnostic tasks and clinical prediction across different cancers. And Dr. Joe Yeong [of Singapore General Hospital] gave a very good talk on how AI can be applied in digital pathology to accelerate research in immunology and help in the development of immunotherapies. Dr. Danielle Bitterman [of Brigham and Women’s Hospital] shared very good examples of how LLMs could be used in a clinic. And I think the example that really stood out for me was how LLMs could be deployed to create responses to patient queries. And of course, the big question in the room was: How could AI eventually encapsulate compassion in their response? I think this again showcased how LLMs could really help to accelerate our clinical work going forward. And ultimately circling back to data, Dr. Caroline Chung [of MD Anderson] gave a very poignant description on the importance of data quality and how poor-quality data could eventually lead to underperforming AI models. So all in all, I think this was a great session. And what do you think, Dr. Siu? Dr. Lillian Siu: Melvin, I totally agree with you. I like all your comments and I really enjoyed the keynote as well as the session on AI in the cancer clinic chaired by Dr. Pearson. I think all these sessions were really informative. Discussions on the latest AI and machine learning, algorithms and technologies on digital pathology, LLMs and big data, as you said, really enables the attendees, especially clinicians like me, to gain a deep understanding of how AI can be translated to practical applications. Dr. Melvin Chua: Great. So, Dr. Siu, let's talk about some of the novel therapeutics that were featured at the meeting. Again, this was an important session for Breakthrough, and it's always been there. So could you share some highlights from the sessions on novel drug development from your perspective? Dr. Lillian Siu: Yes, indeed. Drug development is such an exciting aspect of this meeting. On Day 3 of the meeting, we had a keynote by Dr. Shimon Sakaguchi of Osaka University, who discussed “.” And he talked about T cells, especially Treg biology, the role of Tregs in immune regulation, new developments in Treg immuno-oncology drugs, and how we can actually target Tregs to treat early cancers, etc. This talk is particularly exciting because there are now anti CCR8 antibodies in the clinic that specifically target Tregs, and some early signals of anti-tumor activities are already being observed. Dr. Sakaguchi also emphasized the importance of combination sequence and timing of drugs for the successful use of cancer immunotherapeutic agents. I also want to emphasize the Education Session that followed, titled, “.” In that particular session, we heard about engineering T-cell immunity to eradicate tumors. We heard about CAR T-cell therapy in GI cancers, novel immunotherapeutic combinations, and T-cell engagers, which are bispecifics in cancer. While success with some of these immunotherapeutic modalities, such as cell therapies and T-cell engagers have been largely seen in hematological malignancies, we are beginning to observe efficacy signals in solid tumors. For example, the CAR T targeting Claudin18.2 in gastrointestinal cancers and the recently approved FDA-approved DLL3/CD3 bispecific T-cell engager, tarlatamab, in small cell lung cancer are really exciting examples. We also heard from investigators who are exploring neoadjuvant therapies in the neoadjuvant therapy session, and the key takeaway from that session is that we have growing interest in using neoadjuvant therapy or perioperative therapy. In other words, neoadjuvant plus adjuvant therapy in different cancers. In the , there were updates provided by different experts on the roles of neoadjuvant therapy in melanoma, liver cancer, bladder cancer, and nasopharyngeal cancer. Increasingly, there is randomized trial evidence to support the use of neoadjuvant therapy or perioperative immunotherapy in several cancer types with survival-based endpoints. Very exciting indeed. Dr. Melvin Chua: Indeed, I couldn't agree with you more. I think one of the things that went into designing the case-based discussions this year was that we wanted to talk about cancers that were relevant to this part of the world and hence we again showcased lung cancers, gastric cancers and melanomas, and whereby we have again perspectives from an expert from the West coupled to an expert from the East, thereby showcasing the diversity of practice around the world. The other thing that we did this year was we decided to pair the case-based discussions with the keynotes and the Education Sessions as well. For example, on Day 3, we had Dr. Sakaguchi speak on Tregs, as you mentioned. And this was followed by an in-depth session on new immunotherapies, and then followed by a case-based discussion on different melanoma cases on the role of neoadjuvant immunotherapy in this disease, and the strikingly relevance of response to prognostication. This is an important trait that we're seeing now that seems to pan out across different cancers, where we find that neoadjuvant response to combination systemic therapies and/or radiotherapy is a strong prognosticator. Dr. Lillian Siu: So, Dr. Chua, we've discussed some breakthrough treatments and promising advances in cancer care, and we've touched upon some barriers to success in cancer treatment. I would like to ask you about the of the World Health Organization, who spoke passionately about efforts by the WHO and its partners to build equity in cancer care. Can you share some highlights with us? Dr. Melvin Chua: Absolutely, Dr. Siu. In spite of the tremendous advances we’ve seen in recent years in oncology, there are still major disparities in cancer care, such as cost and access, which affect patients worldwide. I think was a very nice overview whereby she showed, first of all, the WHO's impact in terms of the WHO Cancer Resolution initiative that was implemented in 2017, where through this initiative, WHO has impacted 100 countries, invested $1 billion in funds, and that has led to millions of lives saved. But she then really drilled down to some of the key examples of the focus of the WHO in terms of equalizing care in cancer. I think one which struck me was the appreciation of the disparities in the clinical trials landscape. I think it is clear that there's still a huge barrier to clinical trials between the high- and middle-income countries and the low- and middle-income countries, and the majority of clinical trials these days are industry sponsored and we really need to look at leveling the playing field in this regard. Then she highlighted the WHO’s work on trying to lower the barriers to precision oncology. And I think there are several issues in that sense, but I think what the WHO has really worked hard on is promoting education for genomic medicine, where they've done several reviews with experts around the world to educate the field across the world on how we interpret and apply genomics in the clinic. So all in all, it was very interesting to hear Dr. Casolino’s insights from a policy perspective, and again, this emphasizes that there's so much work to be done at the end of the day and the dialogue needs to continue. We also heard about policy, academic and industry perspectives in the context of clinical trials, and that led to a discussion on real-world evidence generation for regulatory approvals. It was very nice that we had a session on that at the end of Breakthrough 2024 (). And in that session, we heard from Dr. Shaalan Beg [of the NIH], and Dr. Janet Dancey [of Queen’s University] who represented views from academia and Dr. Hidetoshi Hayashi [of Kindai University Hospital] shared perspectives on decentralized trials. I’d like to encourage our listeners to watch these sessions if they were unable to attend. The content is very rich, and I'm sure they'll learn from it. Dr. Lillian Siu: Thank you so much, Dr. Chua. Is there anything else you would like to cover before we wrap up the podcast today? Dr. Melvin Chua: Thank you, Dr. Siu. The thing I really want to emphasize is, apart from all these Educational Sessions and having very eminent keynote speakers, one of the key points that we really want to bring out for Breakthrough is to showcase the high-quality research. This year we had 300 abstracts submitted and they were all high quality, cutting across trials, omics research, AI and technology, and eventually we selected 235 of them and we were able to showcase some of them across three oral sessions over three days. I think this is an important component of Breakthrough that we really wish to continue building upon where people are now excited to use this forum to present their work. Dr. Lillian Siu: Thank you so much, Dr. Chua. I really enjoyed our discussions today. I look forward to seeing how the Breakthrough meeting will continue to grow in future years. Dr. Melvin Chua: Thank you again, Dr. Siu. Thank you for all your leadership and efforts in making Breakthrough a successful meeting series the past few years. Dr. Lillian Siu: Thank you to our listeners for your time today. You'll find links to the session discussed today in the transcript of this episode. Finally, if you value the insights that you hear on the ASCO Daily News Podcast, please take a moment to rate, review and subscribe wherever you get your podcast. Thank you. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. Find out more about today’s speakers: @lillian_siu @DrMLChua Follow ASCO on social media: Disclosures: Dr. Lillian Siu: Leadership (Immediate family member): Treadwell Therapeutics Stock and Other Ownership Interests (Immediate family member): Agios Consulting or Advisory Role: Merck, AstraZeneca/MedImmune, Roche, Voronoi Inc., Oncorus, GSK, Seattle Genetics, Arvinas, Navire, Janpix, Relay Therapeutics, Daiichi Sankyo/UCB Japan, Janssen, Research Funding (Institution): Bristol-Myers Squibb, Genentech/Roche, GlaxoSmithKline, Merck, Novartis, Pfizer, AstraZeneca, Boehringer Ingelheim, Bayer, Amgen, Astellas Pharma, Shattuck Labs, Symphogen, Avid, Mirati Therapeutics, Karyopharm Therapeutics, Amgen Dr. Melvin Chua: Leadership, Stock and Other Ownership Interests: Digital Life Line Honoraria: Janssen Oncology, Varian Consulting or Advisory Role: Janssen Oncology, Merck Sharp & Dohme, ImmunoSCAPE, Telix Pharmaceuticals, IQVIA, BeiGene Speakers’ Bureau: AstraZeneca, Bayer, Pfizer, Janssen Research Funding: PVmed, Decipher Biosciences, EVYD Technology, MVision, BeiGene, EVYD Technology, MVision, BeiGene Patents, Royalties, Other Intellectual Property: High Sensitivity Lateral Flow Immunoassay for Detection of Analyte in Samples (10202107837T), Singapore. (Danny Jian Hang Tng, Chua Lee Kiang Melvin, Zhang Yong, Jenny Low, Ooi Eng Eong, Soo Khee Chee)
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How AI Can Improve Patient Identification and Recruitment for Clinical Trials
08/15/2024
How AI Can Improve Patient Identification and Recruitment for Clinical Trials
Dr. Shaalan Beg and Dr. Arturo Loaiza-Bonilla discuss the potential of artificial intelligence to assist with patient recruitment and clinical trial matching using real-world data and next-generation sequencing results. TRANSCRIPT Dr. Shaalan Beg: Hello, and welcome to the ASCO Daily News Podcast. I'm Dr. Shaalan Beg, your guest host for the podcast today. I'm an adjunct associate professor at UT Southwestern's Simmons Comprehensive Cancer Center in Dallas and senior advisor for clinical research at the National Cancer Institute. On today's episode, we will be discussing the promise of artificial intelligence to improve patient recruitment in clinical trials and advanced clinical research. Joining me for this discussion is Dr. Arturo Loaiza-Bonilla, the medical director of oncology research at Capital Health in Philadelphia. He's also the co-founder and chief medical officer at Massive Bio, an AI-driven platform that matches patients with clinical trials and novel therapies. Our full disclosures are available in the transcript of this episode. Arturo, it's great to have you on the podcast today. Dr. Arturo Loaiza-Bonilla: Thanks so much, Shaalan. It's great to be here and talking to you today. Dr. Shaalan Beg: So we're all familiar with the limitations and inefficiencies in patient recruitment for clinical trials, but there are exciting new technologies that are addressing these challenges. Your group developed a first-in-class, AI-enabled matching system that's designed to automate and expedite processes using real-world data and integrating next-generation sequencing results into the algorithm. You at the ASCO Annual Meeting this year where you showed the benefits of AI and NGS in clinical trial matching and you reported about a twofold increase in potential patient eligibility for trials. Can you tell us more about this study? Dr. Arturo Loaiza-Bonilla: Absolutely. And this is just part of the work that we have seen over the last several years, trying to overcome challenges that are coming because of all these, as you mentioned, inefficiencies and limitations, particularly in the manual patient trial matching. This is very time consuming, as all of us know; many of those in the audience as well experience it on a daily basis, and it’s resource intensive. It takes specialized folks who are able to understand the nuances in oncology, and it takes, on average, even for the most experienced research coordinator or principal investigator oncologist, 25 minutes per trial. Not only on top of that, but in compound there's a lack of comprehensive genomic testing, NGS, and that complicates the process in terms of inability to know what patients are eligible for, and it can delay also the process even further. So, to address those issues, we at Massive Bio are working with other institutions, and we're part of this … called the , which is a combination of 7 of the top 20 top pharma companies in oncology, and we got them together. And let's say, okay, the only way to show something that is going to work at scale is people have to remove their silos and barriers and work as a collaborative approach. If we're going to be able to get folks tested more often and in more patients, assess for clinical trials, at least as an option, we need to understand further the data. And after a bunch of efforts that happened, and you're also seeing those efforts in and other things that we're working on together, but what we realize here is using an AI-enabled matching system to basically automate and expedite the process using what we call real-world data, which is basically data from patients that are actually currently being treated, and integrating any NGS results and comparing that to what we can potentially do manually. The idea was to do multi-trial matching, because if we do it for one study, yeah, it will be interesting, but it will not show the potential applicability in the real world. So with all that background, the tool itself, just to give you the punchline of it, was proven highly effective in terms of efficiency. We were able to increase the number of potential matches, and not only that, but reducing the time to the matching. So basically, instead of spending 25 minutes, it could be done in a matter of seconds. And when you compound all that across multiple clinical trials, in this case, it was several sponsors coming together, we were able to reduce the manual effort of seeing patients and testing for clinical trials to basically 1 hour when it would have otherwise taken a ridiculous amount of time. And it was quantified as 19,500 hours of manual work, compared to 1 hour done by the system to uniquely match a cohort of about 5,600 patients that came into the platform. And this was across 23 trials. Now imagine if we can do it for the 14,000 clinical trials currently in clinicaltrials.gov. So for us, this kind of was an eye-opening situation that if we can increase not only the efficiency but find even more trials by integrating comprehensive genomic testing, which in this case was a twofold increase in eligibility for clinical trials, that gives us not only the opportunity for optimized processes using AI but also a call to action that there is still a lot of under-genotyping. And I know American Cancer Society and ASCO and many others are working hard on getting that into fruition, but we need to have systems that remind us that certain patients are not tested yet and that can improve not only real patients, but the R&D and the process of innovation in the future. Dr. Shaalan Beg: Yeah, it's always an important reminder that even some of the highest impact IT solutions or AI solutions are most effective if they can be integrated into our normal clinical processes and into the normal workflow that we have in our clinics to help clinicians do their work quickly and more efficiently. Can you talk about how, over the last few years, the availability of NGS data in our electronic medical record (EMR) has evolved and whether that's evolving for the better? And what are some next steps in terms of making that data available at EMR so that such solutions can then pull that data out and do clinical trial matching? Dr. Arturo Loaiza-Bonilla: Yes. So one of the things that we have seen over the last couple of years is because of the applicability of the , there is less “information blocking,” which is patients not being able to access their information in real time. Now, with the appearance of health exchanges, with patient-centric approaches, which is something that many innovators, including ours, are trying to apply, it's really becoming more relevant. So it's not only helping us to find the patients when they really need to get tested, but also is giving us the opportunity to put those patients into the right treatment pathway when found. Something that's still a challenge and I think we can work by being more collaborative once again – is my dream – is having these pre-screening hubs where no matter where you are in your cancer journey, you just go into that funnel and then are able to see, “Okay, you are in the second-line setting for non-small cell lung cancer, EGFR-mutated. Now, do you have a meta amplification, then you go for this study or this trial. Oh, you haven't been tested yet. You should get tested. You're a pancreas cancer patient who is KRAS wild type; well, there is a significant chance that you may have a biomarker because that's where most patients are enriched for.” So having that opportunity to at scale, just for the whole country, to get those patients access to that information, I think is crucial for the future of oncology. And I think you working at the NCI, more than most, know how the impact of that can help for those underrepresented patients to get more access to better treatment options and whatnot. And we can activate clinical trials as well in new models, decentralized models, adjusting time models, all those things can be leveraged by using biomarker testing in real time. Identification when the patient really needs a trial option or a medication option, because the data is telling us when to activate that in real time. Dr. Shaalan Beg: And identifying the patient for a potential clinical trial is one challenge. In oncology, given a lot of our trials, we are looking to enroll people at a specific time in their disease journey. So we call it first-line or second-line or third-line, becomes the next challenge. So just knowing someone has mutation number 1, 2, or 3 isn't enough to say they would be eligible for a second-line BRAF X, Y and Z mutation at a given trial. I've heard you talk a lot about this last-mile navigation for people once you've identified that they may be a soft match for a clinical trial. Can you talk about what you've seen in the ecosystem being developed on how AI is helping both clinics and patients navigate this last mile from the time they're identified for a clinical trial to the time they actually receive cycle 1, day 1? Dr. Arturo Loaiza-Bonilla: Yeah, absolutely. And that is such a critical point because, as you know, we have helped tons of patients getting trial options in thousands of cases. But even my own patients, I give them a report for trial options and they're like, “Okay, I still need help.” And we have been talking with ASCO, with the American Cancer Society, and many other very good teams, and what we see as an opportunity in technology here is leveraging those cancer journeys to know when the patient really has the opportunity to enroll in a trial, because this is a very dynamic environment. Not only the patient's condition changes because their cancer progresses, the hemoglobin changes, the cancer moves from one place to the other, and there's nuances in between, but also new medications are coming up, studies open and close, sites open and close. So having this information as a hub, as what we call a command center, is the key to make this happen. And we can use the same tools that we use for Uber or for Instacart or whichever thing you want to do; it's already the same concept. When you need groceries, you don't need groceries every day. But Amazon gives you a ding that’s like, “Well, I think you may be running out of milk,” because they already know how often you buy it, or just having the data behind the scenes of how typically these, in this case, patient journeys, may manifest based on the biomarker. So let's say a smoldering multiple myeloma is not the same across. One patient with biomarkers that make them very high risk, the risk of progressing to a multiple myeloma, first-line treatment-eligible patient is going to be much different than someone who has better risk cytogenetics. So using that tool to optimize the cancer journeys of those patients and being able to notify them in real time of new trial options, and also knowing when the patient really has that disease progression so there's a time of activation for trial matching again, the same way you get a credit score for buying a house, then you know exactly what options are in front of you at that very moment. And that is the last-mile component, which is going to be key. What we have seen that we feel is important to invest on, and we have invested heavily on it, is that until the patient doesn't sign the consent form for the clinical trial, that patient is completely unknown to most people. The site doesn't know them because they haven't been there, and they may be there, but they don't know about the options sometimes. But no one's going to invest in getting that patient to the finish line. There's a lot of support for patients on trials, but not before they enroll on trials. And we feel that this is a big opportunity to really exponentially grow the chances of patients enrolling in trials if we support them all the way from the very time they get diagnosed with cancer in any setting. And we can help that patient on a very unique journey to find the trial options using technology. So it's very feasible. We see it once again in many other equally complex tasks, so why not do it in oncology when we have all the bonafides across wanting to do this. Dr. Shaalan Beg: Can you give examples of where you are seeing it done outside of oncology that's a model that one can replicate? Dr. Arturo Loaiza-Bonilla: I mean, oncology is the toughest use case to crack. You have experiences with DCTs in the past and all that. So the big opportunities are for patients, for example, in psychiatry, when they need certain counseling and help. We see that also in medical devices, when people have diabetes and they really need a device specifically for that unique situation, or also for patients with cardiovascular risk that they can in real time get access to novel therapeutics. And that's how they have been able to enroll so quickly. And all these GLP-1 inhibitors, all those models are really almost completely decentralized nowadays in something that we can extrapolate for oncology once we have aligned the ecosystem to make it see them. This is something that we can really revolutionize care while we manage all the complex variables that typically come with oncology uses. Dr. Shaalan Beg: I would imagine while you translate those learnings from outside of oncology into oncology, a lot of those processes will be human and AI combination activities. And as you learn more and more, the human component becomes a smaller fraction, and the technology and the AI becomes more of a component. Are you seeing a similar transition in the clinical trial matching space as well? Dr. Arturo Loaiza-Bonilla: Yes. So that's why people say humans are going to be replaced. They're not. Patients still want to see a human face that they recognize, they trust. Even family members of mine want to hear from me, even if they are in the top place in the world. What we can change with technology are those things that are typically just friction points. In this case, information gathering, collecting records, getting the data structured in a way that we can use it for matching effectively, knowing in real time when the patient progresses, so we can really give them the chances of knowing what's available in real time. And collecting the information from all these other stakeholders. Like, is the site open? Is the budget approved for that place? Is the insurance allowing the specific … do they have e-consent? Those things can be fully automated because they're just burdensome. They're not helping anyone. And we can really make it decentralized for e-consent, for just getting a screening. They don't need to be screened at the site for something that they're going to receive standard of care. We can really change that, and that's something that we're seeing in the space that is changing, and hopefully we can translate it fully in oncology once we are getting the word out. And I think this is a good opportunity to do so. Dr. Shaalan Beg: You talked about your dream scenario for clinical trial matching. When you think about your dream scenario as a practicing oncologist, what are the AI tools that you are most excited about making their way into the clinic, either wishful thinking or practically? Dr. Arturo Loaiza-Bonilla: I typically get feedback from all over the place on doing this, and I also have my own thoughts. But I always come to this for a reason. We all became physicians and oncologists because we like being physicians. We like to talk to patients. We want to spend the time. I tell folks in my clinic, I will see a thousand patients all the time as long as I don't have to do notes, as long as I don't have to place orders. But of course, they will have to hire 1,000 people ancillary to do all the stuff that we do. If we can go back and spend all that time that we use on alert fatigue, on clicking, on gathering things, fighting insurance, and really helping align those incentives with clinical trials and biomarker testing and really making it a mankind or a humankind situation where we're all in this really together to solve the problem, which is cancer, that will be my dream come true. So I don't have to do anything that is clerical, that is not really helping me, but I want to use that AI to liberate me from that and also use the data that is generated for better insights. I think that I know my subject of expertise, but there's so many things happening all the time that it is hard to keep up, no matter how smart you are. If the tool can give me insights that I didn't even know, then leverage that as a CME or a board certification, that would be a dream come true. Of course, I'm just dreaming here, but it's feasible. Many of these ideas, as I mentioned, they're not new. The key thing is getting them done. The innovative part is getting stuff done, because I'm sure there's a gazillion people who have the same ideas as I did, but they just don't know whom to talk to or who is going to make it happen in reality. And that's my call to action to people: Let's work together and make this happen. Dr. Shaalan Beg: Well, Arturo, thanks a lot for sharing your insights with us today on the ASCO Daily News Podcast. Dr. Arturo Loaiza-Bonilla: Well, thank you so much for the time and looking forward to having more exchanges and conversations and seeing everyone in the field. Dr. Shaalan Beg: And thank you to our listeners for your time today. You'll find a link to the studies discussed today in the transcript of this episode. And if you value the insights that you hear on the podcast, please take a moment to rate, review, and subscribe wherever you get your podcasts. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. Find out more about today’s speakers: Follow ASCO on social media: Disclosures: Dr. Arturo Loaiza-Bonilla: Leadership: Massive Bio Stock and Other Ownership Interests: Massive Bio Consulting or Advisory Role: Massive Bio, Bayer, PSI, BrightInsight, Cardinal Health, Pfizer, Eisai, AstraZeneca, Regeneron, Verily, Medscape Speakers’ Bureau: Guardant Health, Bayer, Amgen, Ipsen, AstraZeneca/Daiichi Sankyo, Natera Dr. Shaalan Beg: Consulting or Advisory Role: Ispen, Cancer Commons, Foundation Medicine, Genmab/Seagen Speakers’ Bureau: Sirtex Research Funding (An Immediate Family Member): ImmuneSensor Therapeutics Research Funding (Institution): Bristol-Myers Squibb, Tolero Pharmaceuticals, Delfi Diagnostics, Merck, Merck Serono, AstraZeneca/MedImmune
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DESTINY-Breast06 and A-BRAVE: Advances in Breast Cancer Research
08/08/2024
DESTINY-Breast06 and A-BRAVE: Advances in Breast Cancer Research
Dr. Allison Zibelli and Dr. Erika Hamilton discuss the results of the DESTINY-Breast06 trial in HR+, HER2-low and HER2-ultralow metastatic breast cancer and the A-BRAVE trial in early triple-negative breast cancer, the results of which were both presented at the 2024 ASCO Annual Meeting. TRANSCRIPT Dr. Allison Zibelli: Hello, I'm Dr. Allison Zibelli, your guest host of the ASCO Daily News Podcast. I'm an associate professor of medicine and breast medical oncologist at the Sidney Kimmel Cancer Center of Jefferson Health in Philadelphia. My guest today is Dr. Erika Hamilton, a medical oncologist and director of breast cancer research at the Sarah Cannon Research Institute. We'll be discussing the , which showed a progression-free advantage with the antibody-drug conjugate trastuzumab deruxtecan (T-DXd) compared to chemotherapy in hormone receptor-positive HER2-low or HER2-ultralow metastatic breast cancer. We'll address the implications of this study for the community, including the importance of expanding pathology assessments to include all established subgroups with HER2 expression, and the promise of expanding eligibility for antibody-drug conjugates. We'll also highlight advances in triple-negative breast cancer, focusing on the , the first study reporting data on an immune checkpoint inhibitor avelumab in patients with triple-negative breast cancer with invasive residual disease after neoadjuvant chemotherapy. Our full disclosures are available in the transcript of this episode. Erika, it's great to have you on the podcast today. Dr. Erika Hamilton: Thanks so much, Allison. Happy to join. Dr. Allison Zibelli: Antibody-drug conjugates are rapidly changing the treatment landscape in breast cancer. The data from the DESTINY-Breast06 trial suggests that trastuzumab deruxtecan may become a preferred first-line treatment option for most patients with HER2-low or HER2-ultralow metastatic breast cancer after progression on endocrine therapy. First, could you remind our listeners, what's the definition of HER2-ultralow and what were the findings of this trial? Dr. Erika Hamilton: Yeah, those are fantastic questions. Ultralow really has never been talked about before. Ultralow is part of a subset of the IHC zeros. So it's those patients that have HER2-tumor staining that's less than 10% and incomplete but isn't absolutely zero. It's even below that +1 or +2 IHC that we have classified as HER2-low. Now, I think what's important to remember about D-B06, if you recall, D-B04 () was our trial looking at HER2-low, is that D-B06 now included HER2-low as well as this HER2-ultralow category that you asked about. And it also moved trastuzumab deruxtecan up into the frontline. If you recall, D-B04 was after 1 line of cytotoxic therapy. So now this is really after exhausting endocrine therapy before patients have received other chemotherapy. And what we saw was an improvement in progression-free survival that was pretty significant: 13.2 months versus 8.1 months, it was a hazard ratio of 0.62. And you can ask yourself, “well, was it mainly those HER2-low patients that kind of drove that benefit? What about the ultralow category?” And when we look at ultralow, it was no different: 13.2 months versus 8.3 months, hazard ratio, again, highly significant. So I think it's really encouraging data and gives us some information about using this drug earlier for our patients with hormone receptor-positive but HER2-negative disease. Dr. Allison Zibelli: I thought this study was really interesting because it's a patient population that I find very difficult to treat, the hormone receptor-positive metastatic patient that's not responding to endocrine therapy anymore. But it's important to mention that T-DXd resulted in more serious toxicities compared to traditional chemotherapy in this study. So how do you choose which patients to offer this to? Dr. Erika Hamilton: Yeah, those are both great points. So you're right, this is after endocrine therapy. And in fact, about 85% of these patients had received at least 2 prior lines of endocrine therapy. So I have some people kind of asking, “Well, if endocrine therapy really isn't benefiting everyone in the second-line setting post-CDK, should we just move to the ADCs?” And, no, probably we should really make sure that we're exhausting endocrine therapies for those patients that are going to benefit. And once we determine somebody has endocrine-resistant disease, that's when we would think about switching. In terms of the side effects, I think you're right. It's mainly ILD that's probably the more serious side effect that we worry about a little bit with trastuzumab deruxtecan. The good news is, through multiple trials, we've gotten a little bit better at managing this. We've pretty much all but eliminated any fatal cases of ILD, definitely less than 1% now. ILD rates, depending on what study you look for, kind of ranges in that 10% to 15% range. Any grade ILD on D-B06 was 11.3%. So really kind of making sure that we look for ILD at scans, making sure that patients are educated to tell us about any new pulmonary symptoms: cough, exertional dyspnea, shortness of breath at rest, etc. But I think the most common side effects that we really deal with on a daily basis with trastuzumab deruxtecan, luckily, is nausea, which we've gotten better at managing with the 2- or 3-drug antiemetic regimen, and probably a little bit of fatigue as well. Dr. Allison Zibelli: Thank you. So, I think for most people in the community, the sticking point here will be expanding pathology assessments to include all of the subgroups, including the ultralow. Most patients in the community are not testing for HER2-low and HER2-ultralow now. Dr. Erika Hamilton: Historically, we kind of all did HER2 IHC, right? And then as FISH became available, there were a lot of institutions that moved to FISH and maybe didn't have IHC anymore. And now, at least in my institution, we do both. But I think it's a very important point that you made that IHC was really designed to pick out those patients that have HER2-high, the 3 pluses or the FISH amplified cases. It was not to tell the difference between a 1+ or a 2+ or a 0 that's not quite a 0 and a 1+. So I think you're right. I think this is tough. I probably have a little bit more of an interesting take on this than some people will. But data from ASCO, not this year but in 2023, there was actually a pretty eloquent presented where they looked at serial biopsies in patients, and essentially, if you got up to 4 or 5 biopsies, you were guaranteed to have a HER2-low result. Now, this didn't even include ultralow, which is even easier. If we know we include ultralow, we're really talking about probably 85% to 90% of our patients now that have some HER2 expression. But if we biopsy enough, we're guaranteed to get a HER2 low. And so I think the question really is, if we know IHC wasn't really designed to pick out these ultralows, and we know kind of greater than 90% of patients are going to have some expression, did we kind of develop this drug a little bit backwards? Because we thought we understood HER2, and the reality is this drug is a little bit more like a sacituzumab govitecan, where we don't test for the TROP2. Should we really be kind of serial biopsying these patients or should maybe most patients have access to at least trying this drug? Dr. Allison Zibelli: So I don't think that most of my patients will really be happy to sign up for serial biopsies. Dr. Erika Hamilton: Agreed. Dr. Allison Zibelli: Do we have any emerging technologies for detecting low levels of HER2? You talked about how the IHC test isn't really designed to detect low levels of HER2. Do you think newer detection techniques such as immunofluorescence will make a difference, or will we have liquid biopsy testing for this? Dr. Erika Hamilton: Yeah, I think liquid biopsy may be a little bit hard, just because some of those circulating tumor cells are more of a mesenchymal-type phenotype and don't necessarily express all of the same receptors. Normally, if they're cytokeratin-positive, they do, but certainly there is a lot out there looking at more sensitive measures. You mentioned immunofluorescence, there are some even more quantitative measures looking at lower levels of HER2. I definitely think there will be. I guess, ultimately, with even the IHC zeros that are the less than 10% incomplete staining, having a PFS that was absolutely no different than the HER2 low, I guess the question is, how low can we really go? We know that even the IHC zeros doesn't mean that there's no HER2 expression on the cell surface. It just means that maybe there's a couple of thousand as opposed to 10,000 or 100,000 copies of HER2. And so it really appears that perhaps this drug really is wedded to having a lot of HER2 expression. So ultimately, I wonder how much we're going to have to use those tests, especially with what we know about tumor heterogeneity. We know that if we biopsy 1 lesion in the liver, biopsy a lymph node, or even another lesion in the liver, that the HER2 results can have some heterogeneity. And so ultimately, my guess is that most people have some HER2 expression on their breast cancer cells. Dr. Allison Zibelli: So maybe we're going to be using this for everybody in the future. Dr. Erika Hamilton: It certainly seems like we keep peeling back the onion and including more and more patients into the category that are eligible to receive this. I agree. Dr. Allison Zibelli: Let's move on to triple-negative breast cancer, namely the A-BRAVE trial. This was an interesting trial for patients that did not get neoadjuvant immunotherapy and testing 2 groups. The first group was those with residual disease after neoadjuvant conventional chemotherapy. The second group was people with high-risk disease identified upfront that had upfront surgery. The study found that adjuvant avelumab did not improve disease-free survival versus observation, which was the study's primary endpoint. But interestingly, there was a significant improvement in 3-year overall survival and distant disease-free survival. Can you give us your thoughts on that? Dr. Erika Hamilton: Yeah, I think this study was really interesting. Right now, the standard for our patients with larger or node-positive triple-negative cancers is . It's a pretty tough regimen. It's kind of 2 sequential uses of 2 chemotherapies, so 4 chemotherapy agents total with pembrolizumab. But you're right, this study looked at those that had residual disease after neoadjuvant that didn't include immunotherapy, or those patients that didn't get neoadjuvant therapy, went to surgery, and then were receiving chemotherapy on the back end. I'm going to give you the numbers, because you're right. The 3-year disease-free survival rates were not statistically significant. It was 68.3% among those that had avelumab, 63.2% with those that had observation only. So the difference was 5.1% in favor of avelumab, but it wasn't statistically significant. A p value of 0.1, essentially. But when we looked at the 3-year overall survival rates, we saw the same pattern, those patients with the avelumab doing better, but it was 84.8% overall survival and not, unfortunately, dying, versus 76.3%. So the magnitude of benefit there was 8.5%, so about 3% higher than we saw for disease-free survival, and this was statistically significant. So is this going to change practice for most patients? I probably don't think so. I think for our patients that have larger tumors that's recognized upfront or have node positivity, we're probably going to want to use neoadjuvant chemo. Being able to get a PCR is very prognostic for our patients and enables us to offer things on the back end, such as PARP inhibitors or further chemotherapy of a different type of chemotherapy. But for our patients that go to surgery and maybe the extent of their disease just isn't recognized initially, this could be an option. Dr. Allison Zibelli: I agree. I think this will be a really useful regimen for patients where we get the surprise lymph node that we weren't expecting, or somebody who comes to us, maybe without seeing the medical oncologist, who got upfront surgery. So I thought this was really interesting. What kind of translational studies do you think we're going to do to try and understand which patients would benefit from avelumab? Dr. Erika Hamilton: Yeah, I think that's a great question, and honestly, it's a question that we haven't really answered in the neoadjuvant setting either. Immunotherapy in breast cancer is just a little bit different than it is in some other diseases. We have a benefit for those patients that are PD-L1 positive in the first line. We really haven't seen benefit for metastatic outside of first line. And then in neoadjuvant, it was among all comers. We don't have to test for PD-L1. And now we have this avelumab data from A-BRAVE. I think the question is, is there’s probably a subset of patients that are really getting benefit and a subset that aren't. And I don't know that PD-L1 testing is the right test. We know a lot of people are looking at TILs, so kind of lymphocytes that are infiltrating the tumor, a variety of other kind of immunologic markers. But my guess is that eventually we're going to get smart enough to tease out who actually needs the immunotherapy versus who isn't going to benefit. But we're not quite there yet. Dr. Allison Zibelli: Thank you, Erika, for sharing your valuable insights with us on the ASCO Daily News Podcast today. Dr. Erika Hamilton: Thanks so much for having me. Dr. Allison Zibelli: And thank you to our listeners for joining us. You'll find the links to all the abstracts discussed today in the transcript of this episode. Finally, if you like this podcast and you value our insights, please take a moment to rate, review, and subscribe wherever you get your podcasts. It really helps other people to find us. So thank you very much for listening today. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. Find out more about today’s speakers: Follow ASCO on social media: Disclosures: Dr. Allison Zibelli: None Disclosed Dr. Erika Hamilton: Consulting or Advisory Role (Inst): Pfizer, Genentech/Roche, Lilly, Daiichi Sankyo, Mersana, AstraZeneca, Novartis, Ellipses Pharma, Olema Pharmaceuticals, Stemline Therapeutics, Tubulis, Verascity Science, Theratechnologies, Accutar Biotechnology, Entos, Fosun Pharma, Gilead Sciences, Jazz Pharmaceuticals, Medical Pharma Services, Hosun Pharma, Zentalis Pharmaceuticals, Jefferies, Tempus Labs, Arvinas, Circle Pharma, Janssen, Johnson and Johnson Research Funding (Inst): AstraZeneca, Hutchison MediPharma, OncoMed, MedImmune, Stem CentRx, Genentech/Roche, Curis, Verastem, Zymeworks, Syndax, Lycera, Rgenix, Novartis, Millenium, TapImmune, Inc., Lilly, Pfizer, Lilly, Pfizer, Tesaro, Boehringer Ingelheim, H3 Biomedicine, Radius Health, Acerta Pharma, Macrogenics, Abbvie, Immunomedics, Fujifilm, eFFECTOR Therapeutics, Merus, Nucana, Regeneron, Leap Therapeutics, Taiho Pharmaceuticals, EMD Serono, Daiichi Sankyo, ArQule, Syros Pharmaceuticals, Clovis Oncology, CytomX Therapeutics, InventisBio, Deciphera, Sermonix Pharmaceuticals, Zenith Epigentics, Arvinas, Harpoon, Black Diamond, Orinove, Molecular Templates, Seattle Genetics, Compugen, GI Therapeutics, Karyopharm Therapeutics, Dana-Farber Cancer Hospital, Shattuck Labs, PharmaMar, Olema Pharmaceuticals, Immunogen, Plexxikon, Amgen, Akesobio Australia, ADC Therapeutics, AtlasMedx, Aravive, Ellipses Pharma, Incyte, MabSpace Biosciences, ORIC Pharmaceuticals, Pieris Pharmaceuticals, Pieris Pharmaceuticals, Pionyr, Repetoire Immune Medicines, Treadwell Therapeutics, Accutar Biotech, Artios, Bliss Biopharmaceutical, Cascadian Therapeutics, Dantari, Duality Biologics, Elucida Oncology, Infinity Pharmaceuticals, Relay Therapeutics, Tolmar, Torque, BeiGene, Context Therapeutics, K-Group Beta, Kind Pharmaceuticals, Loxo Oncology, Oncothyreon, Orum Therapeutics, Prelude Therapeutics, Profound Bio, Cullinan Oncology, Bristol-Myers Squib, Eisai, Fochon Pharmaceuticals, Gilead Sciences, Inspirna, Myriad Genetics, Silverback Therapeutics, Stemline Therapeutics
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The Risks and Benefits of Taking a Break From Cancer Treatment
08/01/2024
The Risks and Benefits of Taking a Break From Cancer Treatment
Dr. Shaalan Beg and Dr. Arjun Gupta discuss the rationale behind treatment breaks and assess the pros and cons based on feedback and data from patients with advanced-stage gastrointestinal cancers. TRANSCRIPT Dr. Shaalan Beg: Hello and welcome to the ASCO Daily News Podcast. I'm Dr. Shaalan Beg, an adjunct associate professor at UT Southwestern's Simmons Comprehensive Cancer Center in Dallas and senior advisor for clinical research at the National Cancer Institute. I'll be your guest host for the podcast today. On today's episode, we'll be discussing treatment holidays in GI cancers. Treatment holidays, also known as drug holidays, are increasingly being discussed in clinical practice and involve voluntarily halting treatment for a duration determined by a health care provider if believed to be beneficial for a patient's well-being. We'll address the rationale behind treatment holidays and explore their potential risks and benefits. Joining me for this discussion is Dr. Arjun Gupta, a GI medical oncologist and health services researcher at the University of Minnesota. Dr. Gupta's research on treatment-related time toxicity has explored the benefits of taking a break from treatment. Our full disclosures are available in the transcript of this episode. Arjun, it's great to have you on the podcast today. Dr. Arjun Gupta: Thanks, Shaalan. It's a joy to be here. Dr. Shaalan Beg: Your research at the intersection of oncology, supportive care, and care delivery is extremely interesting and important in today's day and age. And you've done extensive work on the concept of time toxicity in cancer treatment. So as we think about these discussions in the clinic on treatment holidays and we talk about risks and benefits, I was hoping that you could help explain the concept of time toxicity in cancer treatment and what our listeners should remember from this. Dr. Arjun Gupta: Sure. So time toxicity is simply the time commitments that cancer care imposes on people with cancer and their loved ones, and the burden that comes along with these commitments. When we specifically think about time toxicity associated with a particular cancer treatment, such as chemotherapy, it's the time costs of pursuing, receiving, and recovering from cancer treatment. Now, we have to acknowledge that much of cancer care is essential. We need blood tests to monitor organ function, we need chemo to shrink tumors, and we need a caring oncologist to break bad news. But we have to remember that oncology care is delivered in an imperfect world. Appointments that should take 10 minutes can take 5 hours. People can have uncoordinated appointments, so they're coming to the clinic 3, 4, 5 times a week. And this affects, of course, not only the patient themselves but also their informal care partners and the entire network around them. And this cancer care can completely consume people's lives, leaving no time for rest, recovery, or pursuing joyful activities. We interviewed patients and care partners in some qualitative work, and this was specifically people with advanced-stage gastrointestinal cancers. And we asked them what cancer care was like, and some of the words will shock you. People said things like, “It's like being on a leash.” “My life is like being on an extended COVID lockdown.” “Cancer is a full-time job.” A very experienced oncologist said, “It's like being on call. You may or not get called into the hospital, but you need to always be available.” And so this concept of time toxicity really applies to all people with cancer, but perhaps most so for people with advanced-stage, incurable cancer, when time is limited and when treatment regimens are perhaps not offering massive survival benefits. And in some cases, the time costs of pursuing the treatment can even overtake the very marginal survival benefit offered by the treatment. Dr. Shaalan Beg: This is particularly relevant for gastrointestinal cancers that, even in the world of advanced cancers, are highly burdensome in terms of their symptoms and the concept of being on call, whether you're a patient or a caregiver, and the burden that it has, I think will resonate with a lot of us, that it's always in the back of our mind on what if X, Y or Z were to happen? In the trial, a randomized trial from the UK, investigators assessed whether taking a treatment holiday for maintenance therapy for metastatic colorectal cancer would have a detrimental effect on progression free survival, overall survival, tolerability and toxicity. It looks like the study found that these decisions regarding maintenance therapy should be individualized, but there were not major differences in outcome. Can you comment on this and what applications that has for us in the clinic? Dr. Arjun Gupta: Sure. But before diving into the clinical trial, I just wanted to share a story from the clinic yesterday. It happened in my clinic yesterday, but I'm sure it happens to thousands of patients across the world every single day. So it was the first visit for a patient with stage 4 colon cancer, and they had polymetastatic disease with disease in the lungs and the liver, no actionable biomarkers, and so very likely to be incurable. And so we discussed the usual port and palliative care appointments and chemotherapy backbone, and doing this every 2 weeks, and then doing scans after 4 to 6 doses of chemo to see how the cancer has responded. And then the patient looks up and asks that question, “Okay. So when does this end? When are we done? Do I need to do this forever and the rest of my life?” These are just such innocent and hopeful questions, because the truth is, there is no established end date. But I shared this story that right off the bat, people are looking for breaks. They've not even started chemo, they've not experienced physical or financial or time toxicity, but just psychologically, being on chemo long-term or forever is a very, very hard adjustment. And so it's in this context that we should look at the clinical trial, which was a sub- study of a larger umbrella trial investigating whether continuing on maintenance chemo with oral capecitabine versus taking a treatment break from chemo affected the progression-free survival in people with metastatic colorectal cancer who had disease control after 4 to 6 months of upfront chemotherapy. So they randomized approximately 250 people. These people had largely been treated with FOLFOX or FOLFIRI. Most did not receive a biologic, and approximately half had partial response and half had stable disease. And then they did scans on these patients every two months or so. And the primary endpoint was progression free survival. The median PFS was approximately 4 months in the capecitabine arm and 2 months in the no treatment arm. Of course, as expected, side effects were higher in the capecitabine arm. But impressively, the overall survival was not different between these two arms. So what we're seeing here is that after this period of 4 to 6 months of intensive chemo, if we take a chemo break versus we get some oral chemotherapy, it may affect how quickly the cancer grows on scans, but it maybe does not affect how long patients live. Now, how do these data apply for an individual patient? Now, these are incredibly nuanced and personal decisions and patients can and should choose what aligns best with their values. In some , they asked 100 people with advanced cancer to consider hypothetical scenarios where a new treatment did not increase the overall survival, but potentially increased the progression free survival at the cost of some physical and other toxicities. And then they asked patients if and what PFS thresholds they would accept for this treatment. And around half of patients said no matter how big the PFS is, we do not want to accept the treatment because it causes some toxicity if I'm not going to live longer. Around a quarter of patients said that if the drug elongated progression free survival by three to six months, I would take it, because that's valuable to me even if I don't live longer. But surprisingly, 1 in 6 patients said that they would accept a treatment with no PFS benefit and no overall survival benefit, even at the cost of side effects. And there was a spectrum of reasons for these preferences that they maybe had the battle narrative that “I want to be a fighter, and I don't want to have any regrets,” just showing how complex people's attitudes and values can be. So the point is that continuing on maintenance treatment versus not doing it is not wrong. The point is we often don't even have these data to offer treatment breaks to patients so that they can make decisions that align with their goals. So I think that's the biggest takeaway from the trial for me is that we have some hard data now to guide patients []. Now, strictly speaking, when I'm talking to a patient about these data, doing oral capecitabine in 3-week cycles may not feel like much. It's perhaps a visit every 3 weeks for blood work and for meeting someone from the oncology team. There are no IV drugs given. If one does well, this might literally be one visit every 3 weeks. But we have to consider that things rarely go as smoothly as we plan them to. For someone living 100 miles away and having diarrhea and needing IV fluids, they may require 3 to 4 clinic visits for labs and monitoring. In the trial, 50% of patients on capecitabine had at least one treatment delay, denoting some toxicity. In a different but similar CAIRO3 clinical trial that tested capecitabine and bevacizumab, 10% of patients had to discontinue treatment due to toxicity. And so it's important to remember that what might seem a simple and low burden to us may be very burdensome to patients. In some [published in The Oncologist], even a single simple appointment to a clinic, such as a lab test, often ends up taking patients hours and hours. So I think it's all of this that we have to consider when we present these data to patients. Dr. Shaalan Beg: You've talked about the trial, you mentioned the study as well. How do you see this playing in the clinic? Somebody may be looking to attend a child's wedding or a notable birthday or a trip with the family, and you have the data from these trials supporting you. What are the patient factors in terms of their disease factors, patient factors that you think of when you recommend such a treatment break to a patient? Or, let me flip that over. Who would be a patient that you would be uncomfortable offering a treatment break for with metastatic colorectal cancer? Dr. Arjun Gupta: Yes, I think disease characteristics are a crucial consideration when we consider who we're even offering these treatment breaks to. I think, number one, is the overall disease burden, and if there's any critical visceral disease and how that's responded and how much it's responded to the upfront chemotherapy induction. I think patients where we're worried about having several sites of bulky disease, some that have not responded as well, I think we have to be very, very careful considering complete chemotherapy breaks. In the trial, in subgroup analysis, patients who had stable disease tended to not benefit as much from the chemotherapy break, perhaps indicating that it's really people whose disease is responding, who are doing well, who don't have as much disease burden, who may be better served by these treatment breaks. Dr. Shaalan Beg: Fantastic. I think that provides very good direction for our listeners on how they can apply the results of these trials in their clinic. So we've talked about treatment breaks as a way to give people their time back and to reduce time toxicity. What are other treatment strategies that you have seen deployed to reduce the burden of receiving cancer treatments in general? Dr. Arjun Gupta: You specifically asked about treatment strategies, so I'll start with that before moving to more broad interventions. We actually interviewed patients and care partners to ask them this question, and one of the things that they said was having prospective information from their oncology care team just about what my expected burden was going to be. So I think people recognize that they need oncology care and the clinicians are trying to help them and it's a broken system, but just knowing that 1 in 4 days will be spent with health care contact or not, or you will spend two hours arguing on the phone with a payer, for example, preparing and supporting people for these burdens is very important. There are obviously some alternative treatment schedules. Certain chemotherapies can be given less frequently now. So if you look at cetuximab in GI cancers, for example, when the initial trials were done, it was given every week, but now we more and more use it every two weeks. And it might not seem like much, but it can open up an entire week for a patient when they can think that I don't need to go in this week at all. So these are just some minor adjustments that we can make in the clinic. But patients often highlight things that may perhaps not be in the direct control of the oncologist, but in the direct control of us as an oncology community. And perhaps the most frequently cited suggestion was having more care coordination and navigation services. So patients really requested more flexibility in the site of care: “Can I come closer to home?’’ In the timing of their care, ‘’Can I come in at 2:00 PM after I get childcare instead of coming in at 9:00 AM?” They really requested cluster scheduling or having appointments on the same day, if possible, instead of taking up Monday, Tuesday, Wednesday, Thursday, coming in so many times. And all of this could potentially be achieved by having a designated care coordinator, someone working directly with the patient and their care partner. And then some patients also highlighted the benefits of telemedicine and home-based care, where they were able to be home more. But we have to also recognize that those things are not universally good and often can increase burdens on the patients and care partners. Also, I wanted to highlight some feedback we received from oncology clinicians. We asked a variety of oncology clinicians, including nurses, APPs, physicians, schedulers, and social workers, what they thought were the causes of patients’ time burden. You'll be surprised to hear that when they started talking about patients’ time burdens, they slowly started to talk about their own time burdens. And they said, ‘‘We really want to help people, but we're just doing prior authorization and spending hours on the electronic medical record. And please fix my own time toxicity, and I will fix the patients’ time toxicity,” which I thought was very profound because I think everybody who goes into medicine goes into it for the right reasons, and we end up not providing perfect care, not because of us, but because of the system. I take this as a very, very positive sign and as a hope for change. Dr. Shaalan Beg: What inspired you to focus on this topic and your research? Dr. Arjun Gupta: So I personally just hate waiting at the doctor’s office. But yes, it's also been wise mentors, including you, Shaalan, during residency and fellowship, who always told me to keep my ear to the ground and listen to patients. And in full disclosure, time toxicity, and what we've done with it recently, it's nothing new. It's been around for decades. And I think our research group has just sort of named it and shamed it, and now more and more people are starting to think about it. But I can point to two specific instances that I think of. One was when I was starting fellowship in 2018, I read a , where she quoted Henry Thoreau and said, “The price of anything is the amount of life, or time, that you exchange for it.” And it really struck a chord with me, entering the oncology discipline and seeing what people with cancer go through. And then the second instance is, I remember my granddad, who was perhaps the most formative person in my life. We were very, very close. And when I was about to enter medical school, he was undergoing chemotherapy for lymphoma. The image that's imprinted in my head is of him putting ketchup on gulab jamun. And I can see Shaalan salivating. But for the listeners who may not know, gulab jamun is an Indian sweet made out of milk, flour, sugar, ghee, molded into balls, deep fried and then served in sugar syrup. And my granddad could not taste anything. He could not taste gulab jamun. All he could taste was ketchup. And so he would put ketchup on everything. And at his oncologist visits when I would accompany him, they would discuss the good news about the cancer shrinking and there being a response, and he was happy, but he could just not taste his gulab jamuns. And it made me realize very early on that the tumor is not the only target. Dr. Shaalan Beg: What a wonderful story. I think those are really hard to measure, quantify, and when patients do bring those stories into the clinic, I think you realize that you have a very special connection with those patients as well, and it does help us as clinicians give personalized advice. So thanks for sharing. Arjun, thanks for sharing your valuable insights with us on the ASCO Daily News Podcast today. Dr. Arjun Gupta: Thanks so much for having me, Shaalan. Dr. Shaalan Beg: And thank you to our listeners for your time today. You'll find links to the studies discussed today in the transcript of the episode. Finally, if you value the insights that you hear on the podcast, please take a moment to rate, review, and subscribe wherever you get your podcasts. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. Find out more about today’s speakers: Dr. Gupta’s Research on Time Toxicity: · · · · · Health Care Contact Days Experienced by Decedents With Advanced GI Cancer, JCO OP · Follow ASCO on social media: Disclosures: Dr. Arjun Gupta: Employment (An Immediate Family Member): Genentech/Roche Dr. Shaalan Beg: Consulting or Advisory Role: Ispen, Cancer Commons, Foundation Medicine, Genmab/Seagen Speakers’ Bureau: Sirtex Research Funding (An Immediate Family Member): ImmuneSensor Therapeutics Research Funding (Institution): Bristol-Myers Squibb, Tolero Pharmaceuticals, Delfi Diagnostics, Merck, Merck Serono, AstraZeneca/MedImmune
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How to Enhance Early-Stage Breast Cancer Survivorship
07/25/2024
How to Enhance Early-Stage Breast Cancer Survivorship
Drs. Hope Rugo, Diana Lam, Sheri Shen, and Mitchell Elliott discuss key strategies and emerging technology in early-stage breast cancer survivorship, including mitigating risk through lifestyle modification, surveillance for distant recurrence, and optimization of breast imaging. TRANSCRIPT Dr. Hope Rugo: Hello, I'm Dr. Hope Rugo, your guest host of the ASCO Daily News Podcast today. I'm a professor of medicine and director of breast oncology and clinical trials education at the University of California San Francisco's Comprehensive Cancer Center. I'm also an associate editor of the ASCO Educational Book. There are currently about 4 million breast cancer survivors in the United States, according to the American Cancer Society, and this number is expected to rise as more women are being diagnosed at early stages of this disease, thanks to advances in early detection and the delivery of more effective adjuvant and neoadjuvant treatment leading to successful outcomes. In today's episode, we'll be discussing current and emerging clinical strategies for the survivorship period, focusing on a multidisciplinary approach. Joining me for this discussion are Drs. Mitchell Elliott, Sherry Shen, and Diana Lam, who co-authored, along with others, a recently published article in the titled, “Enhancing Early-Stage Breast Cancer Survivorship: Evidence-Based Strategies, Surveillance Testing, and Imaging Guidelines.” They also addressed this topic in an presented at the recent ASCO Annual Meeting. Dr. Elliott is a drug development fellow and clinician scientist trainee at the Princess Margaret Cancer Center in Toronto, Canada. Dr. Sherry Shen is a breast oncologist and assistant attending at the Memorial Sloan Kettering Cancer Center in New York. Dr. Diana Lam is a breast radiologist and associate professor at the University of Washington Fred Hutchinson Cancer Center in Seattle. Our full disclosures are available in the transcript of this episode. It's great to have you all on the podcast today. Thank you for being here. Dr. Mitchell Elliott: Thank you so much. Dr. Sherry Shen: Thank you. Dr. Hope Rugo: Let's go into the meat of the article now and try to provide some interesting answers to questions that I think come up for clinicians all the time in practice. Your article points out that addressing the challenges in early-stage breast cancer survivorship requires a comprehensive, patient-centered approach, focusing on mitigating risk through lifestyle modification, surveillance for distant recurrence, and optimization of breast imaging. Dr. Shen, surveillance can facilitate the early detection of recurrence, but ultimately the goal is to prevent recurrence. Lifestyle modifications are a key component of survivorship care, and there are many interventions in this context. Could you summarize the best approaches for mitigating risk of breast cancer recurrence through lifestyle modification and how we might accomplish that in clinical practice? Dr. Sherry Shen: Absolutely. This is a question that we get asked a lot by our breast cancer patients who are so interested in what changes they can make within their lifestyle to improve their breast cancer outcomes. I always tell them that there are three main things, three main lifestyle factors that can improve their breast cancer outcomes. Firstly, enough physical activity. So the threshold for physical activity seems to be around 150 minutes of a moderately vigorous level per week. So moderately vigorous means something that gets the heart rate up, like walking quickly on rolling hills, for example. Or patients can do a vigorous level of physical activity for at least 75 minutes per week. Vigorous meaning playing a sport, swimming, for example, running, something that really gets the heart rate up. The second really important lifestyle modification is limiting alcohol use. Keeping alcohol to less than 4 to 7 drinks per week is particularly important for breast cancer outcomes, especially in women who are postmenopausal and have hormone receptor positive diseases. That's where the strongest connection is seen. Lastly, maintaining a healthy weight. We know that women who gain more than 5% to 10% of their diagnosis body weight have a higher risk of breast cancer recurrence and worse breast cancer outcomes. That, of course, is easier said than done, and it's primarily through dietary modifications. I always tell women that in terms of specific things in the diet, it's really hard to study at a population level because diets vary so much between patients. But what is really important is consuming a plant-forward whole foods diet that prioritizes nutrients and the quality of the diet. A little bit more specifically, it's important to limit the amount of red and processed meats in the diet, really limit the amount of sugar sweetened beverages, ideally to cut that out of the diet entirely, and to consume an appropriate amount of dietary fiber in the range of 20 to 30 grams per day. Those are more specific things that have been associated with breast cancer outcomes. Dr. Hope Rugo: This is such helpful, practical information for clinicians and for patients. Thank you. But let's move on to another area, surveillance testing for distant recurrence, an area of great interest, in fact highlighted in a special session at ASCO 2024. In clinic, we've seen that many cancer survivors expressed surprise at the less intensive approach to surveillance testing for recurrence, with the whole idea that if you detected it earlier, the outcome would be better. But it does raise an important question. What is the optimal strategy for monitoring for recurrence? And importantly, can early detection through surveillance testing impact outcome? Dr. Elliott, your research has focused on ctDNA surveillance and the evolving role of minimal residual disease, or MRD. Can you comment on the current surveillance guidelines for distant recurrence, and then, how we really define true MRD? Dr. Mitchell Elliott: Those are excellent questions, and I think leaving that Education Session at ASCO left us with even more questions than answers with the current role of MRD in this setting. I think a lot of this comes from wanting to help patients and trying to identify the patients at highest risk of cancer recurrence, with the goal of intervening with effective targeted therapy to prevent metastatic relapse. Current international guidelines in the United States done by ASCO and the NCCN, as well as ESMO guidelines in Europe and even our local Canadian guidelines, do not suggest that patients undergo routine screening in asymptomatic individuals, whether it be blood work or routine radiographic imaging, as there were some studies that were done in the late 1990s and early 2000s that didn't actually show benefit and actually maybe favored a little bit of harm in these situations. So these recommendations are based on these initial studies. However, we know that in the last 10, 15 years, even 20 years, that breast cancer and the landscape of breast cancer has changed significantly with the introduction of our typical standard classification of breast cancer, the emergence of HER2 positive breast cancer, and thus triple negative breast cancer, which was not actually routine standard testing at the time of these studies, and also the most effective therapies we have to date, including immunotherapy, HER2 targeted therapy and the advent of antibody drug conjugates. We're at prime time right now to potentially revisit this question, but the question is, do we have the right technology to do so? And this is where the circulating tumor DNA has really emerged as a potential option, given its minimally invasive opportunity with a standard blood test to actually identify tumor specific DNA that is highly predictive of distant metastatic recurrence or patient recurrence in general. The evolving role – we still have a lot of questions in this setting. There have been a lot of retrospective analyses of cohort studies and clinical trials that have shown that modern fit for purpose MRD based tests actually have a high positive predictive value at identifying patients with imminent risk of breast cancer recurrence. The most important thing in this setting is that there are different fit for purpose tests. The initial ctDNA assays were actually genotyping based assays, which look for the presence of mutations in the blood. But we know that the sensitivity of these assays is quite challenging at the level of ctDNA required to actually diagnose patients with very small amounts of residual disease. So the fit for purpose MRD assays are now emerging on the market. And we have several that are in clinical development, several that are in research development, but the high specificity in the setting is very important, which we're seeing some evolving and emerging technologies in this setting. We really don't have the data about if these interventions, so if we were to effectively deploy these MRD based ctDNA assays prospectively in patients, if they will actually improve patient outcomes, and how do we correct and address lead time bias, which might potentially affect study results? Also, the important thing to think about in this setting is if we are able to find something, we also should have an effective therapy to actually intervene for patients, because the outcome in these trials will actually be dependent not only on identifying early breast cancer occurrence, but also delivering the best targeted intervention for that individual patient, which currently we don't understand fully. Another really interesting thing is there was a trial, the trial, as many of our listeners may know, that was randomizing patients with patients with ctDNA detected in the adjuvant setting were randomized through either intervention or standard follow up. And going forward, is it actually an opportunity, or is it possible to actually randomize patients knowing that they have a near 100% likelihood of breast cancer recurrence to observation? So these are several ongoing questions that we have to address as we move forward to deploying this technology in the clinical space. Dr. Hope Rugo: Really fascinating, and thanks for sharing that. I think really broad and helpful information on these ctDNA [assays] and also our surveillance guidelines, which I think really suggests that you only do surveillance for cause, other than looking for local recurrence and new cancers with breast imaging. So it is really an interesting time where we're seeing evolving technologies and evolving understanding of how we can best do this kind of testing when there are so many different assays out there. I think it's going to take a little while. And also understanding, as you pointed out, trying to target treatments when patients have emerging ctDNA to mutations. And we just have no idea yet if we're going to ultimately change outcomes. This is really helpful, and I think we'll give people a good understanding of where to think about this right now, what to look for in the future. Now, of course, it's a nice segue into the idea of breast imaging for early breast cancer survivors because that's where we do have data. Dr. Lam, let's talk about how we optimize breast imaging in early-stage breast cancer survivors, because there's such a wide variation in breast cancer imaging survival protocols between different centers and different countries. And of course, here our group is representing two countries and really a broad geographic area. So some of the variations are when to do imaging in terms of frequency, when to start imaging and what kind of examination to do, screening versus diagnostic, MRI versus mammogram. And of course, there are some emerging imaging techniques as well. Could you tell us a little bit about the variation in imaging surveillance protocols in survivors, and the challenges and what you recommend? Dr. Diana Lam: First off, I want to say that surveillance mammography saves lives and annual intervals are uniformly recommended among both national and international guidelines. However, we know that in practice there are variations in imaging surveillance protocols, with approximately 40% of sites performing imaging at more frequent or six-month intervals for at least one to two years. In addition, there's variation in what type of mammogram someone gets in terms of the indication. They might be getting initial diagnostic mammograms for a short period of time or screening mammograms. However, overall, there is limited evidence in improved outcomes in women getting a diagnostic versus a screening exam for asymptomatic surveillance. In addition, there is limited evidence in increased frequency of surveillance, for example, every six months versus one year. The real difference between a screen and a diagnostic mammogram, if someone is asymptomatic in the surveillance population, primarily has to do with workflow. For screening examinations, the imaging is generally viewed after a patient leaves the facility, and it might actually take days, maybe even weeks, for the results to be delivered to the patient. In addition, if more imaging is needed, the patient will need to return back to the facility, which does diagnostic imaging work for us to work up this finding. And this practice approach causes diagnostic delays in care. It also disproportionately affects Black and Hispanic women. For diagnostic mammography surveillance, there's generally real time interpretation with immediate results. However, there are both access and scheduling limitations, as not all facilities actually perform these types of examinations. There may also be out of pocket costs which are increased due to the diagnostic indication of this exam. So what we found, which is an approach that can aid in minimizing patient costs and decreasing these health disparities, is to provide immediate interpretations of these screening mammography surveillance exams, or so-called online screens where diagnostic workup and potential biopsy can be performed on the same day. Dr. Hope Rugo: This is all very interesting, but what do we tell our patients? How do we, as oncologists, decide on how frequently to get mammograms? Should we be getting diagnostic or screening? And do we sequence MRI with mammograms for everybody or just for certain patients? And then some patients will say, “Well, my doctor does an ultrasound to mammogram.” We don't do that for screening. When do you recommend that? Dr. Diana Lam: We do know that compared to people without a personal history of breast cancer, surveillance mammography is actually less sensitive. It's only about 70% versus 87% or so percent sensitive with over four times more interval cancers or cancers diagnosed after a negative surveillance mammogram compared to the general screening population without a personal history of breast cancer. In addition, about 35% of invasive second breast cancers are actually interval cancers or those not detected by surveillance mammography. However, there is currently no guideline consensus on supplemental breast imaging or additional imaging beyond surveillance mammography. Contrast-enhanced breast MRI is most often recommended, particularly for patients who are already at high risk for breast cancer, such as those with genetic mutations, or patients who have had primary breast cancer diagnosed at a younger age to less than 50 years old, or those patients who have dense breast tissue on mammography. There is a question about whole breast ultrasound and this is generally not specified or recommended unless the patient is unable to undergo breast MRI. This is primarily due to the number of false positive examinations or findings that are seen that do not amount to breast cancer. We do have the opportunity here to tailor surveillance imaging by selecting people who are at high risk for interval second breast cancers in order to decrease harms and improve patient outcomes. We know that there are a number of factors such as primary breast cancer subtype which affects second breast cancer risk. We know that women who have ER negative and/or hormonal negative breast cancers have significantly higher recurrence rates within the five years of treatment with no significant difference after that 5 years. We also know that there are certain factors such as imaging factors where patients are more likely to develop an interval second cancer with mammography surveillance only. And these are factors such as if their primary breast cancer was hormone negative, if they had an interval presentation to start, or if they had breast conservation without radiation therapy. So, in terms of the future of local breast imaging surveillance, this can be improved with upfront risk prediction and stratification based on the patient, primary breast cancer and treatment factors, as well as looking at imaging test performance to optimally guide the modality and frequency of surveillance imaging. Dr. Hope Rugo: Really interesting. Well, thank you all three of you for sharing your valuable insights. This has been so interesting and a great addition to the ASCO Daily News Podcast. I would encourage everyone to actually read the article as well because there's some really great tables and interesting information there that of course we don't have time to cover, but thank you, all three of you. Dr. Diana Lam: Thank you. Dr. Mitchell Elliott: Thank you for having us. Dr. Hope Rugo: And thank you to our listeners for joining us today. You'll find a link to the article that you can read and look at and cut out the tables discussed today in the transcript of this episode. I encourage all of our listeners also to check out the where there is an incredible wealth of useful information. Finally, if you value the insights that you've heard today and here on ASCO Daily News Podcast, please take a moment to rate, review and subscribe wherever you get your podcasts. Thanks again. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience and conclusions. Guest statements on the podcast do not express the opinion of ASCO. The mention of any product, service, organization, activity or therapy should not be construed as an ASCO endorsement. Follow today’s speakers: Follow ASCO on social media: Disclosures: Dr. Hope Rugo: Honoraria: Mylan/Viatris, Chugai Pharma Consulting or Advisory Role: Napo Pharmaceuticals, Puma Biotechnology, Sanofi Research Funding (Inst.): OBI Pharma, Pfizer, Novartis, Lilly, Merck, Daiichi Sankyo, AstraZeneca, Gilead Sciences, Hoffmann-LaRoche AG/Genentech, Inc., Stemline Therapeutics, Ambryx Dr. Diana Lam: No relationships to disclose Dr. Sherry Shen: Honoraria: MJH Life Sciences Research Funding (Inst.): Merck, Sermonix Pharmaceuticals Dr. Mitchell Elliott: No relationships to disclose
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Putting Patients First: Common Sense in Cancer Care
07/18/2024
Putting Patients First: Common Sense in Cancer Care
Dr. Nathan Pennell and Dr. Christopher Booth discuss Common Sense Oncology, a global initiative that aims to advance patient-centered, equitable care and improve access to treatments that provide meaningful outcomes. TRANSCRIPT Dr. Nate Pennell: Hello. I'm Dr. Nate Pennell, your guest host today for the ASCO Daily News Podcast. I'm the co-director of the Cleveland Clinic Lung Cancer Program and vice chair of clinical research at the Taussig Cancer Center, and I also serve as the editor-in-chief of the . My guest today is Dr. Christopher Booth, a professor of oncology and health sciences at Queen's University in Kingston, Ontario, where he also serves as the director of the Division of Cancer Care and Epidemiology. He joins me today to discuss his recently published article in the 2024 ASCO Educational Book titled, “.” Dr. Booth also addressed this topic during a joint ASCO/European Cancer Organization at the 2024 ASCO Annual Meeting. Dr. Booth, welcome. Thanks for joining me. Dr. Christopher Booth: Thanks for inviting me here, and I look forward to our conversation. Dr. Nate Pennell: In your in the Educational Book, and again, thank you so much to you and your co-authors for writing that for us, and during your presentation at the ASCO Annual Meeting, I think your topic really resonated with a lot of people. You explained that the essence of oncology is delivering compassionate care, and I really was struck by the statement, “the treatments need to provide meaningful care, meaningful improvements in outcomes that matter regardless of where the patients live.” Can you just tell us what exactly is Common Sense Oncology? What's your vision for what it can do to help address some of our growing challenges today? Dr. Christopher Booth: Thanks, Nate. So, the was launched just over a year ago, and it really was a grassroots gathering of clinicians, policymakers, academics, as well as patients and patient advocates who recognize that there's many things we do well in the current cancer care system, but there's also areas that we can improve. And so it was created as a space for us to advocate for greater access for the things that we know really help people, but also to create a space where we can be willing to have some tough conversations and some humility and look within our field at some of the things that maybe aren't working as well as they should, and try to be constructive and not just be critics of the system, but actually be solution-focused and to try to move things forward. The Common Sense Oncology initiative, which has really taken off over the last year, really brings together people from all health systems who care deeply about people and their families who are with cancer. And our mission is that cancer care systems deliver treatments that have outcomes that matter to patients. And the vision is that, as you stated in your introduction, regardless of where someone lives, they have access to those cancer treatments which really do make a difference in their lives. Dr. Nate Pennell: That certainly sounds like something everyone should be behind. Before we talk about some of what Common Sense Oncology may be doing to help address some of the inequities in cancer care, one of the challenges that is addressed in your paper is the focus on modern clinical trials and perhaps some of the mistakes that we're making in how they are designed. In many ways, we sort of live in a golden age of clinical trials with biomarker driven treatments, which can be incredibly effective in small populations of people, sometimes at great expense. So, focusing on our modern clinical trials, some of the criticisms that have arisen are that perhaps the endpoints that are being designed really aren't ones that are meaningful for patients, or that the gains that they're trying to look for in these trials may not be particularly meaningful. So, talk a little bit about that, if you might. Dr. Christopher Booth One day, I might write a book called Paradoxes in Cancer Care. But there's a number of these things I think about. I'll start, Nate, in response to your question by talking about something I think of called the ‘three buckets paradox.’ The three buckets paradox, I think, reflects a communication failure on the part of our field whereby if a patient or member of the public only reads the newspapers about cancer, they might wonder why we even have cancer hospitals and why Dr. Pennell and Dr. Booth even have a job, because everything we're doing is curing cancer. But we know the reality is different. And so, I conceptualize cancer treatments as going into three different buckets. We have the red bucket, which are those treatments, which really are transformational, and I've been working in oncology for 20 years now and we've seen a number of these treatments. They markedly increase cure rates or help people live for many, many months or extra years of life. And we have those treatments; they're almost out of a science fiction movie. The green bucket is a series of treatments. They're not perhaps transformational, but they're very, very good. They offer substantial benefits to our patients, and we have quite a few of those. The concern that I think many of us recognize, and just to state emphatically that the problems that CSO is thinking about are not new problems; I think every oncologist has struggled with these things throughout each of our own careers. The concern is the third bucket, which includes many of our newer treatments, some of which, of course, are transformational. But many of the new treatments fall into this bucket, which have important side effects. They have major financial toxicity for patients' families and the system. They have time toxicity, especially in the last year of life. And the reality is most of these new treatments, either there's no proven benefit they help people live longer or better lives, or if they do, it's measured in a number of weeks. I think we need to reconcile the fact that we need to maybe speak honestly about some of the challenges in our field to recognize there's probably too many treatments going into that last bucket, and we need to push harder in the research ecosystem and the policy space to ensure we have more treatments in the first two buckets and that they remain widely available to everyone. So, to get to the specific issues you raised in your question, Nate, some of the effect sizes and the endpoints we're choosing are problematic, I think. We have many, many examples of incredible clinical trials and new treatments that really make a difference for the lives of our patients. I want to state emphatically that the RCT remains the best tool we have to identify new treatments for patients of tomorrow, and any challenges with clinical trials, actually, it's not the fault of the RCT; these are self-inflicted by us who design, interpret, and act on clinical trials. And so the use of surrogate endpoints is a major issue in our field. And I just want to also state emphatically that there are circumstances where surrogate endpoints make a lot of sense and we should be using them. The problem is, I think with our excitement to get treatment answers more quickly, we've really embraced surrogate endpoints in a very, very rapid way. And in fact, I shouldn't even refer to them as surrogate endpoints. Maybe we should use the term alternative endpoints because in many cases they have been found to not be valid surrogates for those things which we know matter to patients: overall survival and quality of life. So certainly, there's a place for surrogate endpoints. I think we live in an era now where the majority of clinical trials are being designed to detect improvements in progression-free survival rather than overall survival. So historically, most clinical trials were being launched to see if we could help people live longer or feel better. Now, the default endpoint is progression-free survival, which largely is based on tumor measurements on a CAT scan. And certainly, there are circumstances where those tumor measurements do relate to how someone feels or how long they live, but in most circumstances, that's not the case. I think we need to take a step back and just see the big picture here about where it is that we're going, and how can we raise the bar and ensure that we're identifying treatments that really offer meaningful gains to patients. Because we have to be honest about the fact that the patients and families are the ones who need to live through the side effects, the time toxicity and financial toxicity of these treatments. So, this is about maybe raising the bar and aiming a bit higher than we currently are. Dr. Nate Pennell: And it looks like CSO basically is putting together teams around evidence generation, evidence interpretation and evidence communication that I guess, is trying to advocate and influence this? Dr. Christopher Booth: Yeah. So, when we launched this initiative, which now is this large global coalition of people, we wanted it to be really solution focused. So, our workstream is oriented around trying to improve how we generate evidence, how we interpret evidence, and how we communicate evidence. So, the evidence generation workstream is being led by a series of leading clinical trialists from all over the world, together with patients and patient advocates who are looking at how we can come up with a framework and principles to design, perhaps a more thoughtful approach to the design, reporting, and conduct of clinical trials. So that's kind of a clinical trials workstream. And I should mention all of these project teams are populated by clinicians, academics, members of the public, as well as patient and patient advocates who, in some cases, are co-leaders of the workstreams. The evidence interpretation workstream is an educational bucket being led by clinicians and educators, together with patients, to see how we can improve the skill set of the next generation of oncologists to be better equipped in skills and epidemiology, critical appraisal, and critical thinking, so we can better dissect trials which have been well designed from those which might have some limitations, identify those treatments which have very substantial gains from those which are perhaps more marginal. And then the third workstream relates to how we communicate evidence. And this is communication broadly, how we talk about these very complex and nuanced issues at the bedside between oncologist and patient. But how we talk more broadly in society, through the media, with public and policy makers, about some of the challenges in cancer care, recognizing, of course, that no one individual, group or person is going to have the answer for what treatments matter for any specific patient. This is going to vary by every patient with their unique values, preferences and goals in life. But we think we can do a better job of talking about these issues and empowering patients to have the information they need so they can make the treatments that match their own goals and wishes. Dr. Nate Pennell: Oh, thank you. Another thing that I was interested in in your paper, and when we talk about value and whether these endpoints that are being released for drugs that become approved are meaningful to patients, the other aspect of value is, of course, the cost. And we know that basically every new drug that gets approved, just an astronomical cost these days, which doesn't often factor into whether to approve them. It doesn't often factor into a doctor's decision about whether to use them. Can you talk a little bit about this? And is cost of drugs something that CSO is interested in addressing, or is that more of just a part of the equation in determining value of these? Dr. Christopher Booth: No, I think it's a really important point. So the value construct, I'm not an economist, so I think about this as a simple Canadian chemotherapy doctor would, which is the interface of what you get - so the magnitude of benefits, that's the endpoint, and the effect size - relative to the downsides, the cost, the clinical toxicity, time toxicity, and financial toxicity. So historically, I mean, I think, Nate, you and I will remember maybe 10 or 15 years ago when this really came on the scene, all the conversations focused on the denominator, the cost of cancer medicines, which became astronomical over the last 10 or 20 years. And we've learned a few things about that over time, and I'll get to that in a moment in reference to your question. But I think as individual clinicians or investigators, or even people writing guidelines, we don't have a lot of ability to influence the price of cancer medicines, although I think we still need to speak out about these prices, which are largely unjustified. I'll come back to that. But where I think there's growing interest, and we've seen this in the last five years, is the numerator in that value construct, which is the magnitude of benefit, the endpoint, the effect size. And I think that's where we actually have much more ability to influence. We are the doctors who make treatment recommendations, the experts who write guidelines, the investigators who design trials and so I think we need to take a bit more ownership when it comes to this magnitude of benefit construct. And that's where a lot of the work that Common Sense Oncology is doing rests. But to answer your question about cost, this is a major problem. We've known that it's been shown by several groups that the price of a cancer medicine is not justified by the R and D cost, that's been shown over time. We also have a problem where the magnitude of benefit offered by that drug also has no bearing to the price. And so this speaks to the need to really, I think, undertake more rigorous health technology assessment and think very carefully about- you know every other economic model that you and I live in, Nate, if, you know, if we have a growing family, we need a larger apartment or house, we spend more money, we get a bigger house. If we want to keep up with our kids on their fast bicycles, we spend more money, we get a better bicycle. And when it comes to cancer medicines, we found that not only is there no relationship between how well the drug works and its price, our group and others have found, if anything, there's an inverse relationship, whereby the drugs with the smallest benefit have the largest price tag. And I don't think you need a PhD in economics to know that is an incredibly broken system. So, I think there's a lot that we need to talk about when it comes to cost. Common Sense Oncology cares deeply about this because it's a huge issue about health justice and global equity and access to cancer medicines. And I think we need to work on that. But we also can't forget about the numerator, which is, to what extent do these treatments help people? Dr. Nate Pennell: I know that every time I see one of these fabulous new presentations at ASCO Plenary or something like that, I just imagine many of the doctors and patients who live outside the U.S., maybe in low- and middle-income countries, who don't have the same access to basic oncology care and specialty oncology care that we do in Western countries, and what goes through their minds when they think about this. And so, I know that this is another big part of what CSO is doing, is thinking about global equity and access to cancer care. And so, can you tell me a little bit about how you're hoping to address that? Dr. Christopher Booth: Yeah. And so, you're right. I guess I'll tell you another Booth cancer paradox. I call this the cancer medicine paradox, which is, on the one hand, in many health systems, I think we'll recognize that there's often overutilization of cancer medicines that are toxic, expensive, and small benefits, especially in the last year of life. So, we have that kind of overutilization paradigm in some parts of the world, but we also have this paradox where we have massive underutilization of those treatments that we know actually have large benefits. And the tragic part of this is many of those treatments are old, generic drugs that actually should be very affordable. Some of this work comes out of myself and a number of my founding colleagues of Common Sense Oncology have a policy role with the World Health Organization Essential Medicine list. My interest in this started, I guess, many years ago when I had a sabbatical in India and lived and worked at a large government cancer hospital for a period of time. And so, from this WHO working group, we launched a project. It's been called the Desert Island study. It was called the Desert Island Project for reasons I'll tell you in a moment. But essentially it was a survey of 1,000 oncologists on the frontlines of care in 82 countries worldwide. And what we are interested in doing is in our role as an advisory group to the WHO Essential Medicine List, we come up with a list of those medicines which are really most important and should be provided in all health systems. And we were interested in going to the frontlines of care, leaving the boardroom of Geneva, and going to the frontlines of care and asking real doctors in the real world, “What medicines do you think are the most important for the patients that you look after?” So, it was a survey. We asked a lot of demographic questions about their clinical practice and their health system, but we called it the , because the core question of the survey was based on the thought experiment that you and I have done many times with friends at dinner parties. For example, if you're moving to a desert island and you could only take three books, what would those books be? If you're going to have dinner with any famous podcast host in the world other than Dr. Pennell, who would that person be? And so the thought experiment was, imagine your government has put you in charge of cancer care for your country. You can choose any cancer medicines you want that will be freely available for all cancers and all people in your country. Cost is not an issue, but you can only choose 10. You can only choose 10 of those medicines to take to the desert island to look after all the people in your country, what would those medicines be? And it's amazing; of those thousand oncologists, we found, first of all, remarkable convergence between doctors, regardless of where they work, whether it was a high-income country, middle-income country, lower-income country, the doctors were very pragmatic. When we looked at the drugs that went in that suitcase over and over again, the most common drugs were the good old fashioned cytotoxic chemotherapy drugs and hormone drugs we've been using for 20 or 30 years that we know have very, very large benefits, and in the modern era now should be very affordable because they've been off patent for many years. In that list of medicines that went to the desert island, there also were some of our newer drugs that are new and they're very expensive. But they are those drugs that have very large benefits. And, of course, all of us would want access to those for our patients. So we found that the doctors are pretty pragmatic about which medicines if they're pushed to offer the largest benefit. But the next part of the question was, okay, you've told us which medicines you want to put in your suitcase to take to the desert island, please now tell us the reality in your health system to what extent can you deliver these medicines? And it was shocking. The vast majority of oncologists, a huge number of them, said they could not even provide doxorubicin or cisplatin without causing major financial toxicity for that patient and family. Even for trastuzumab, now available as a biosimilar,...
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An Era of Promise for Cancer Vaccines
07/11/2024
An Era of Promise for Cancer Vaccines
Dr. Pedro Barata and Dr. Lillian Siu discuss recent advances in cancer vaccines and biomarkers, including the potential of the neoantigen and immune modulatory vaccines and the challenges surrounding cancer vaccine development. TRANSCRIPT Dr. Pedro Barata: Hello, I'm Dr. Pedro Barata, your guest host for the ASCO Daily News Podcast today. I'm a GU medical oncologist at the University Hospitals Seidman Cancer Center in Cleveland, Ohio, and an associate professor of medicine at Case Western Reserve University School of Medicine. I'm also an associate editor of the . And today we'll be discussing a timely that was recently published in the Educational Book titled, “State-Of-The-Art Advancements on Cancer Vaccines and Biomarkers.” I'm delighted to welcome one of the article's co-authors and a world-renowned oncologist, Dr. Lillian Siu. She is a senior medical oncologist and director of the Phase 1 Program at the Princess Margaret Cancer Center and a professor of medicine at the University of Toronto. Welcome, Dr. Siu. Dr. Lillian Siu: Thank you, Dr. Barata; it's great to be here. Dr. Pedro Barata: Wonderful. Dr. Siu will discuss new tools for cancer vaccine development, strategies for combating the immunosuppressive and tumor microenvironment. She will also address cancer vaccine guidelines and patient recruitment strategies to optimize patient selection and access to cancer vaccine trials. I should say that Dr. Siu and her co-authors also addressed this topic during an at the ASCO 2024 Annual Meeting. Finally, our full disclosures are available in the transcript of this episode. So again, Dr. Siu, great to be speaking with you today. I'm looking forward to our discussion. Dr. Lillian Siu: Thank you, Dr. Barata. And before I begin, I want to acknowledge Dr. Jeffrey Weber and Dr. Inge Marie Svane, who both presented during the ASCO you mentioned. They gave excellent presentations related to the topic of neoantigen vaccines and immune-modulatory vaccines, which we will talk about later. Dr. Pedro Barata: Wonderful. So let's get started. Cancer vaccines are among the most promising frontiers for breakthrough innovations and new strategies in the fight against cancer. The successes in vaccine development during the COVID-19 pandemic, I think, inspired further research in this area. Why do you think it's important that we harness these recent successes and technological advances to really accelerate progress in vaccine development? Dr. Lillian Siu: Absolutely. I think all of us who have lived through COVID really appreciated how important the COVID vaccine development was to all of us. It saved millions of lives. And I think we witnessed a paradigm change in drug development that none of us thought was possible, that we're able to actually bring a concept to a drug from bench to bedside within an extremely short time. That timeline is not something we would ever imagine to have happened, and it did. And I think it gives us hope that perhaps this is not just limited to the COVID vaccine; it's also extrapolatable to other therapeutics – that we can bring promising medicines to our patients in a really expedited timeline, obviously without compromising their safety. We now know that cancer vaccines have entered a new, or maybe I should say, renewed era of promise. And it's holding promise on many fronts, Pedro, if I may. It's very exciting in the area of molecular residual disease. In other words, a setting where the cancer is treated definitively by surgery or radiation, plus adjuvant treatment. And we know some patients will relapse because we know they're at high risk. And now we also have different ways to detect these microscopic risks, such as by ctDNA, circulating tumor DNA, or biomarkers. And we know that having some therapeutic that can eradicate these cancers at such microscopic levels would be very attractive, especially with low toxicity, and I think cancer vaccine is such a candidate. And of course, we can even look further into the future of using such treatment in cancer prevention, especially in those with high risk of developing cancer, for example, those with hereditary syndromes like lynch syndrome. We're not there yet, but I think it holds that promise. So I think, going back to your original question, if we can develop such a therapeutic that is showing promise in a very short period of time, it brings the timeline and the hope to a much shorter timeframe to really deliver to our patients in a very timely manner while safeguarding all the important parts, such as safety and tolerability. Dr. Pedro Barata: Wow, those are such important points. I couldn't agree with you, more. It’s really exciting. As I think through this, and as I was reading through your piece, I was thinking it would be great if you could highlight some of the novel approaches to personalized neoantigen vaccine development that are driving progress in this space. Dr. Lillian Siu: Absolutely. And during the session, Dr. Weber spoke about the neoantigen vaccine, and he's a pioneer in this space. So I can only try to iterate some of the points he had delivered during his . Neoantigen is a very exciting space for immunologists because we know that tumors express these neoantigens. Many of these are unique antigens that are only expressed in tumors, so-called tumor specific antigens, that we can use as our targets, including vaccines, but not limited to vaccines. And with these altered sequences in DNA in different forms, they could be mutations and splice alterations, etc. We expect that we have modified proteins that are expressed by tumor cells, and these become targets for our drug development of vaccines. And now we can have very specific strategies, very sophisticated algorithms to figure out which neoantigens are more so called immunogenic, more likely to stimulate or activate the immune system, and they can be recognized by T cells. So leveraging this knowledge and technology, we have been able to develop especially mRNA vaccines that are deliverable to our patients through different mechanisms, for example, in lipopeptides, etc., so that we can deliver to the patients in a safe way, such that we can use it to deliver vaccines, such as in the MRD setting that I mentioned earlier, as well as in the advanced disease setting. So Dr. Weber, in his , highlighted one of such vaccines that have been tested in a randomized controlled trial that is , which randomized 157 patients to the mRNA vaccine plus pembrolizumab versus pembrolizumab alone in patients with advanced melanoma. This is a vaccine against 34 mutated neoantigens, and it showed a significant difference in the recurrence free survival with a hazard ratio of 0.56. And if you look at the 18-month relapse free survival rate, it was 78.6% versus 62.2%. Obviously, these are still fairly early data and numbers are still small. I think we would definitely look forward to the randomized phase 3 study of neoantigen vaccine in melanoma and other cancers. Dr. Pedro Barata: No, absolutely. And I agree, it's really exciting. Dr. Weber did a fantastic job going through some of that data. So let me ask you Dr. Siu, as you think about this cancer vaccine field, what are the limitations that you'd highlight when you think about cancer vaccine development? What challenges do you encounter, obstacles do you encounter? Dr. Lillian Siu: There are many, many potential challenges. And to some extent, that's probably why cancer vaccine development has been somewhat slow for the many decades until more recently. We know first of all; the target has to be recognized. So we need immunogenic targets. So I think a lot of the effort has been put into trying to understand which antigens expressed by cancer cells are immunogenic, able to activate the immune system. They're obviously assay based methods. You're going to try and see if you can ex vivo stimulate immune cells on dishes and models, etc. But we need to also develop in silico computerized algorithms, and now with AI, I think that makes it even more tangible and exciting that we can actually understand through a large number of neoantigens or other antigens, whether we can choose the ones that are most likely going to actually stimulate T cells to be activated. And I think that is one area that there is a lot of interest in development, how to really develop ways to select out the most attractive antigens. I would also want to highlight that the platforms, which is how we deliver the vaccine, can also pose significant challenges. For example, vaccines can be delivered using peptide-based formulation, cell-based formulation, nucleic acids and viral vectors. For some of these formulations, for example, the peptides very often are restricted to HLA. They can be rapidly degraded in the body, such that they become not really visible to the T cells anymore. Some of the formulations can be very complex. For example, the cell-base; it may need to have cells isolated from patients, cultured, stored and transported to the site of delivery, which can be very complex. For some of the nucleic acid vaccines, they can have very low transfection efficiency. It could be at risk for also having, for example, DNA vaccines integrated into the host genome. And then lastly, there's also the immune suppressive environment in the TME, such that it does not really have the effect when you give it repeatedly. It becomes attenuated and no longer effective. So these are some of the challenges associated with cancer vaccines. Dr. Pedro Barata: Thank you for that summary. I think it's really important for folks out there, including researchers getting into this field, to be aware of potential obstacles they might encounter. So let me ask you the opposite question as we see more compelling preclinical and clinical data emerging in this field of vaccine development, what is really exciting you the most about the newest technologies that are shaping the future of cancer vaccines, in your opinion? Dr. Lillian Siu: I think one I want to highlight is the immune-modulatory vaccine that Dr. Svane, Dr. Inge Marie Svane had presented during the presentation at ASCO. This is a completely different strategy from the neoantigen vaccine. It targets antigens in the tumor microenvironment. And we know that in the tumor microenvironment, we have tumor cells, we have immune cells, and there are many types of cell types, including, for example, macrophages, cancer associated fibroblasts, regulatory T cells, etc. And using these particular cell types, we know that we can really develop vaccines that can stimulate the body's immune system to attenuate, to downgrade some of the negative factors in the tumor microenvironment. And this is what Dr. Svane and her group is trying to do. For example, they have an IDO vaccine that is able to actually target these antigens in the tumor microenvironment, and by that, not just suppressing the negative forces, so to speak, but also activate T cells to help attack cancer cells. I think that's a very interesting area. Very early promise has been seen already in non-small cell lung cancer in early phase trials using the immune-modulatory vaccine. But going back to your question, what kind of advances; I mentioned earlier about having novel ways to select our antigens that are most immunogenic. There are many algorithms that are being developed, and I think we can try and leverage that kind of knowledge from artificial intelligence, machine learning. So I think that's definitely very exciting. There are also new vaccine platforms coming out. For example, there's recent data using modification of peptides, so called amphiphile vaccines, that already show very early promise in colorectal cancer, microsatellite status, colorectal cancer, as well as in pancreatic cancer in the molecular residual disease setting, where these long peptide vaccines targeting KRAS mutants together with adjuvant oligonucleotide DNA, combined together, can actually be given to patients and reduce the chance of cancer relapse in patients with resected colorectal cancer, as well as pancreatic cancer, with endpoints such as ctDNA or biomarker being downregulated. I think that's a very exciting example. Another very exciting example is cell-based vaccines that are being developed in Europe by the NKI Netherlands Cancer Institute Group, where they are looking at plasmacytoid dendritic cells that are loaded with peptides from different tumor associated antigens and then given to patients, which, again, in non-small cell lung cancer, together with pembrolizumab, has yielded very high response rate. And we will almost certainly see more trials coming out using that particular platform with the dendritic cells. So that's just some of the examples of exciting things that are happening in the vaccine field. Dr. Pedro Barata: Thank you. I’m wondering if you can share with our listeners about what really are the existing guidelines for using these new tools for discovery, methods of treatment, and perhaps optimizing patient selection to access trials. Dr. Lillian Siu: To be honest, the latest guideline that was published from the FDA that I can find is almost 13 years ago in 2011. So I think it is time for a new guidance, or at least a draft guidance, to give some additional support and guidance in terms of what to do with these new treatments from the FDA and perhaps other regulatory agencies as well. I think we're now entering a very exciting time that cancer vaccines are no longer an ineffective therapeutic. It is now showing evidence of efficacy, not just in the advanced setting, but also in the molecular residual disease setting. There're so many questions to be answered, like how to develop these trials in early disease; what's the end point? Can we incorporate them into the neoadjuvant setting, and if so, how do we give these drugs before surgery, and do we give them maintenance after surgery? I think guidance from the regulatory authorities would be extremely helpful and informative to guide academic groups as well as the pharmaceutical sector to develop these agents in the right way. Dr. Pedro Barata: Dr. Siu, this is a fantastic summary, and we certainly are on the cusp of a new dawn of discovery and development in cancer vaccines, and super interesting to hear from you talking about it. Before letting you go, do you have any final thoughts that you'd like to share with the listeners, with all of us about this topic? Dr. Lillian Siu: I think as a drug developer like you are, I'm extremely excited because we now have yet another way to leverage the host immunity as a cancer therapeutic, and it is going to be opening a new door to combination therapy because we can imagine combining these treatments with other immunotherapeutics such as bispecific molecules such as CAR Ts and even vaccine plus vaccine combination is feasible. That came up actually during the session as a question from the audience. Can we combine neoantigen vaccines and immune-modulatory vaccines together? And both of our speakers who presented felt that it was possible. Obviously, we have to understand the sequence question and the endpoints question, but the fact that it opens a new door to combinatorial therapy, not just with immunotherapeutics, but perhaps with other therapeutics as well, antibody drug conjugates, etc., really, I think, is very exciting for this field to become further explored. I mentioned earlier in the podcast that the whole area of cancer prevention is something that we have not been tapping into for the last decade with vaccines because it has not been very effective. Viral vaccines, of course, HPV and other vaccines targeting viruses, but targeting cancer cells is not something we have been successful using vaccines to prevent cancer from developing. I think we would be very interested to see if this will become a reality in the next decade. I think we would start off with patients with high risk of developing cancers such as, as I mentioned earlier, those with lynch syndrome, those harboring BRCA alterations, for example. Can we use these vaccines to actually prevent the cancers from developing in such high-risk individuals? I think the field is definitely open to that consideration. Dr. Pedro Barata: Definitely. And I'd like to thank you, Dr. Siu, for sharing these great insights with us today on the ASCO Daily News Podcast. Dr. Lillian Siu: Thank you so much for your time. Dr. Pedro Barata: And thank you to all the listeners for your time today. You'll find a link to the discussed today in the transcript of this episode, and I encourage you to check out the . Finally, if you value the insights that you hear on the podcast, please take a moment to rate, review, and subscribe wherever you get your podcasts. So again, thank you so much for your time and see you soon. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. Follow today’s speakers: Follow ASCO on social media: Disclosures: Dr. Pedro Barata: Honoraria: UroToday Consulting or Advisory Role: Bayer, BMS, Pfizer, EMD Serono, Eisai, Caris Life Sciences, AstraZeneca, Exelixis, AVEO, Dendreon Speakers’ Bureau (Inst): Caris Life Sciences, Bayer, Pfizer/Astellas Research Funding (Inst.): Blueearth, AVEO, Pfizer, Merck Dr. Lillian Siu: Leadership (Immediate family member): Treadwell Therapeutics Stock and Other Ownership Interests (Immediate family member): Agios Consulting or Advisory Role: Merck, AstraZeneca/MedImmune, Roche, Voronoi Inc., Oncorus, GSK, Seattle Genetics, Arvinas, Navire, Janpix, Relay Therapeutics, Daiichi Sankyo/UCB Japan, Janssen, Research Funding (Institution): Bristol-Myers Squibb, Genentech/Roche, GlaxoSmithKline, Merck, Novartis, Pfizer, AstraZeneca, Boehringer Ingelheim, Bayer, Amgen, Astellas Pharma, Shattuck Labs, Symphogen, Avid, Mirati Therapeutics, Karyopharm Therapeutics, Amgen
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GU Oncology Highlights From ASCO24
06/27/2024
GU Oncology Highlights From ASCO24
Dr. Neeraj Agarwal and Dr. Rana McKay discuss promising studies in GU cancers featured at the 2024 ASCO Annual Meeting that highlighted improved outcomes in urothelial carcinoma, improved survival in renal cell carcinoma, and the role of ctDNA as a potential biomarker for predicting outcomes. TRANSCRIPT Dr. Neeraj Agarwal: Hello and welcome to the ASCO Daily News Podcast. I’m Dr. Neeraj Agarwal, your guest host of the ASCO Daily News Podcast today. I am the director of the Genitourinary Oncology Program, a professor of medicine at the University of Utah’s Huntsman Cancer Institute, and editor-in-chief of the ASCO Daily News. I am delighted to welcome Dr. Rana McKay, a GU medical oncologist and associate professor at the University of California San Diego. Today, we’ll be discussing some key GU abstracts featured at the 2024 ASCO Annual Meeting. Our full disclosures are available in the transcript of this episode. Rana, we’re thrilled to have you on the podcast today to share your insights on key advances in GU oncology from ASCO24. Dr. Rana McKay: Thank you so much, Neeraj; it’s a pleasure to be here. Dr. Neeraj Agarwal: So, Rana, let’s start with some bladder cancer abstracts. Could you tell us about , titled “Impact of exposure on outcomes with enfortumab vedotin in patients with locally advanced or metastatic urothelial cancer”? Dr. Rana McKay: Of course, I would be delighted to. First, I would like to remind our listeners that enfortumab vedotin (EV) was approved as a monotherapy for the treatment of locally advanced or metastatic urothelial cancer based on the results of and trials. In these pivotal studies, EV was initiated at a dose of 1.25 mg/kg, and dose modifications, such as reductions and interruptions, were used to manage adverse events. In the presented at ASCO 2024, Dr. Daniel Petrylak and colleagues conducted a post-hoc exploratory analysis to evaluate the association between EV plasma exposure and outcomes. They used multiple pharmacokinetic samples collected during the first two cycles and pre-dose samples from 3 EV monotherapy studies, namely , , and , that were conducted in patients with previously treated locally advanced or metastatic urothelial carcinoma. Dose reductions to 1 mg/kg were required in 42.1% and 35.1% of patients in the EV-201 and EV-301 trials, respectively, and reductions to 0.75 mg/kg were required in 13.6% and 11.1% in the EV-201 and EV-301 trials, respectively. Higher EV exposure during the first two cycles was associated with a higher objective response rate. The ORR was 21.4% for the dose of 0.75 mg/kg, while it was 18.5% for the dose of 1.0 mg/kg. Interestingly, increasing the dosage to 1.25 mg/kg improved the ORR, which ranged from 40 to 51.1% across various studies. In the EV-301 trial, when comparing the efficacy of EV to chemotherapy, EV improved PFS and OS across all dose quartiles, and there was no evidence that recommended dose modifications impacted long-term efficacy outcomes. Dr. Neeraj Agarwal: Thank you, Rana, for this great summary. I would like to add that the meticulously conducted pharmacokinetic studies demonstrated that serum levels of EV correlated with responses. Importantly, patients who had to decrease the dose did not experience compromised outcomes as EV improved PFS and OS outcomes vs chemotherapy in across all exposure quartiles in the EV-301 trial where EV was compared with chemotherapy. These findings highlight the need to start at the recommended dose of 1.25 mg/kg and reduce it, if necessary, however, clinicians should not start at a lower dose. Dr. Rana McKay: I totally agree with you, Neeraj. Now, moving on to a different setting in bladder cancer, what can you tell us about , titled “Perioperative sacituzumab govitecan alone or in combination with pembrolizumab for patients with muscle-invasive urothelial bladder cancer: SURE-01/02 interim results”? Dr. Neeraj Agarwal: Of course! So, was a multicohort, open-label, phase 2 study in patients with muscle-invasive bladder cancer assessing sacituzumab govitecan as a neoadjuvant therapy either alone in or as a combination with pembrolizumab followed by adjuvant pembro in in a flexible design allowing a bladder-sparing approach. In the presented at ASCO 2024, Dr. Antonio Cigliola and colleagues report interim results of the SURE-01 study. Patients with cT2-4N0M0 urothelial carcinoma who were ineligible for or refused cisplatin-based neoadjuvant chemotherapy were planned to receive 4 cycles of neoadjuvant sacituzumab govitecan at a dose of 10 mg/kg followed by radical cystectomy. An extensive assessment was performed at baseline and after the 4 cycles for response assessment. Patients with clinical complete response defined with negative MRI, cystoscopy and ctDNA assays refusing radical cystectomy were offered redo transurethral resection of the bladder tumor or repeat TURBT followed by observation in the absence of viable high-grade tumor in the bladder. The primary endpoint was pathological complete response rate, while secondary endpoints included pathological downstaging rate and safety. After the first 8 patients were enrolled, the protocol was amended due to the occurrence of grade 3 and 4 neutropenia and diarrhea in 75% and 50% of patients, respectively, and 2 deaths – one of which was deemed to be treatment-related due to sepsis. Key protocol changes included the reduction of the dose of sacituzumab govitecan to 7.5 mg/kg, the introduction of G-CSF as primary prophylaxis, and the exclusion of patients at high risk of febrile neutropenia per ASCO guidelines. Among 21 patients who received at least one cycle of sacituzumab govitecan and included in the intention-to-treat population, 47.6% had a complete pathological response, and 52.4% had pathological downstaging. 11 patients underwent radical cystectomy, while 7 received repeat-TURBT due to complete clinical response or patient preference. Regarding the safety profile, grade 3 or more adverse events occurred in 42.5% of patients. Treatment-related adverse events leading to dose interruptions or discontinuations were more common before the protocol amendment. It is noteworthy that 3 patients died after treatment discontinuation, with one deemed treatment-related, as previously mentioned. Dr. Rana McKay: Thank you, Neeraj, for a great summary. The pathological complete responses observed show promising activity for sacituzumab govitecan as a neo-adjuvant therapy and a window for bladder-sparing approaches, which is definitely exciting news for our patients! However, although the 3 deaths encountered in a neo-adjuvant setting could be concerning, the improvement of the safety profile after protocol amendments is reassuring and supports the continuation of the study. Dr. Neeraj Agarwal: Before wrapping up the bladder cancer section, would you like to share your insights with our listeners on , titled “Quantitative circulating tumor DNA (ctDNA) assessment in patients with advanced urothelial carcinoma treated with pembrolizumab or platinum-based chemotherapy from the phase 3 KEYNOTE-361 trial”? Dr. Rana McKay: Sure. So, the trial was a randomized phase 3 study with 3 arms that included pembrolizumab plus chemotherapy, pembrolizumab monotherapy, or chemotherapy alone in patients with previously untreated advanced urothelial carcinoma. The results showed that neither the combination of pembrolizumab plus chemotherapy nor pembrolizumab monotherapy improved survival outcomes compared to the chemotherapy arm. So, in this exploratory analysis presented at ASCO24, Dr. Tom Powles and colleagues sought to assess the role of ctDNA as a potential biomarker between the pembrolizumab monotherapy arm and the chemotherapy arm. Tumor tissue mutations were evaluated using whole exome sequencing, and plasma ctDNA was assessed with the Guardant 360 assay. Changes in ctDNA from pre-treatment cycle 1 to on-treatment cycle 2, so 3 weeks post-baseline assessment, were quantified by the maximum variant allele frequency of tumor tissue-specific mutations. Results showed that lower baseline ctDNA levels were associated with improved clinical outcomes of response in the pembrolizumab arm but not in the chemotherapy arm. This improvement in the pembrolizumab arm was also robust to adjustment for tumor mutational burden and PD-L1. Additionally, chemotherapy led to a ctDNA clearance rate of 41% compared to 11% in the pembrolizumab arm. Patients who had a large ctDNA reduction with pembrolizumab had significantly improved outcomes compared to those achieving a large reduction with chemotherapy with a hazard ratio of 0.25. However, this did not replicate in patients who did not achieve a large reduction, as these patients had similar outcomes across both arms. Let’s switch gears to kidney cancer and start with , reporting the final OS analysis from the trial. Neeraj, what would you like to tell us about this abstract? Dr. Neeraj Agarwal: Well, as a quick reminder, the was a randomized phase 3 trial where patients with previously untreated advanced or metastatic clear cell renal cell carcinoma were randomized to receive either the combination of avelumab plus axitinib or sunitinib. In previous analyses, the combination of avelumab and axitinib significantly improved PFS compared to sunitinib and was subsequently approved by the FDA for the first-line treatment of patients with advanced RCC in 2019. This superiority in PFS was maintained across the different analyses; however, OS data remained immature. In the abstract presented at ASCO24 by Dr. Robert Motzer from Memorial Sloan Kettering Cancer Center and colleagues, the authors reported OS results at a median follow-up of around 73 months and a minimum of 68 months for all patients, which is the longest follow-up for any ICI-TKI combination in RCC. The final analysis in the overall population favored the combination of avelumab plus axitinib with a median OS of 44.8 months compared to 38.9 months with sunitinib, however, this did not reach statistical significance with a hazard ratio of 0.88. The PFS results and safety profile were consistent with previous analyses. Dr. Rana McKay: Thank you, Neeraj, for such a nice overview of this abstract. These new data could make this regimen less optimal than other ICI-TKI combinations in the first-line mRCC setting. Dr. Neeraj Agarwal: I concur, Rana. Moving on to perhaps one of the most exciting GU abstracts featured, , titled “Circulating kidney injury molecule-1 biomarker analysis in : A randomized phase 3 study of adjuvant atezolizumab vs placebo in patients with renal cell carcinoma at increased risk of recurrence after resection.” Rana, what are your thoughts on this abstract? Dr. Rana McKay: Well, first, I would like to take a step back and remind our audience that in the trial, patients with resected intermediate to high-risk RCC with clear cell and/or sarcomatoid component were randomized in a 1:1 ratio to receive either atezolizumab or placebo. Investigator-assessed disease-free survival, which was the primary endpoint, favored the atezolizumab arm but did not reach statistical significance. In the featured at ASCO24, Dr. Laurence Albiges and colleagues build on data previously reported in the and trials and report provocative findings regarding a molecule known as kidney injury molecule 1 or KIM-1, which is a type 1 membrane glycoprotein that has been identified as a minimally invasive potential peripheral blood circulating biomarker. The KIM-1 level of 86 pg/ml was identified as the optimized threshold for defining post-nephrectomy KIM-1 high vs KIM-1 low subgroups in the IMmotion010 trial. KIM-1 levels were measured at baseline or pre-treatment, at cycle 4 day 1, and at disease recurrence or discontinuation without disease recurrence. Baseline characteristics were balanced between the KIM-1 high and KIM-1 low groups, except perhaps for a slightly higher pathological stage in the KIM-1 high subgroup. I would like to highlight 3 key takeaways from this . First, KIM-1 high level was associated with significantly worse DFS with a hazard ratio of 1.75. Second, patients in the KIM-1 high subgroup receiving atezolizumab had a 28% reduction in the risk of recurrence or death compared to those receiving placebo, while those in the KIM-1 low subgroup had comparable outcomes across both treatment arms. Third, patients in the KIM-1 high subgroup receiving atezolizumab were significantly less likely to experience an on-treatment increase in KIM-1 levels, which was associated with worse DFS in both high and low KIM-1 subgroups, regardless of treatment arm. Thus, these findings support the use of KIM-1 as both a predictive and prognostic biomarker in patients with RCC. Dr. Neeraj Agarwal: Yes, Rana, this is amazing data! I would like to add that these results warrant larger and, ideally, prospective studies to validate the utility of KIM-1 as a noninvasive biomarker for identifying minimal residual disease after nephrectomy and for predicting outcomes to immune checkpoint inhibitors. Dr. Rana McKay: Also, in the field of biomarkers, 2 abstracts interrogating different biomarkers in a different setting, so in patients with advanced or metastatic RCC were presented. Neeraj, could you tell us more about these abstracts? Dr. Neeraj Agarwal: Of course! I think you are referring to Abstracts and . In abstract , Dr. Toni Choueiri and colleagues sought to assess the clinical implications of different biomarkers in the trial, which was a randomized phase 3 trial that led to the approval of the combination of pembrolizumab plus lenvatinib in the first-line mRCC setting. On the other hand, in abstract , Dr. Brian Rini presented biomarker results in , which was also a randomized phase 3 trial based on which the combination of pembrolizumab plus axitinib was approved in patients with mRCC. The authors in both trials sought to investigate the role of biomarkers in predicting treatment outcomes from 3 different angles. Starting with PD-L1 expression, the superiority of the combination arms over sunitinib was not impacted by PD-L1 status in both trials. Moving on to RCC driver gene mutations on whole exome sequencing, such as VHL, SETD2, PBRM1, and BAP1, ICI combination therapies improved outcomes regardless of mutation gene status, and this improvement was statistically significant with PBRM1 mutations in compared to wild-type PBRM1, but this did not replicate in the trial. Finally, using transcriptomic signatures derived from RCC trials, especially the and trials, where 7 clusters or molecular subtypes were identified, the combination arms outperformed sunitinib in all clusters in both trials and the magnitude of this benefit differed across clusters. Dr. Rana McKay: Thank you for this very interesting summary and comparison of the results of these 2 abstracts. These findings support the use of ICI-based combinations in all patients with mRCC as a first-line option. Although these abstracts could not identify specific biomarkers that could guide us clinicians in treatment selection, they provide very interesting biological insights on these molecular biomarkers that are, however, not yet clinically actionable. Dr. Neeraj Agarwal: Very interesting point, Rana. Moving on to prostate cancer, let’s start with abstract titled, “Cabazitaxel with abiraterone versus abiraterone alone randomized trial for extensive disease following docetaxel: The CHAARTED2 trial of the ECOG-ACRIN Cancer Research Group (EA8153).” Rana, what is your takeaway on this abstract? Dr. Rana McKay: As a reminder to our audience, the trial was a randomized open-label phase 2 study that compared the combination of cabazitaxel and abiraterone to abiraterone alone in patients with mCRPC previously treated with ADT plus docetaxel in the hormone-sensitive setting. The primary endpoint was progression-free survival. After a median follow-up of 47.3 months, Dr. Christos Kyriakopoulos and colleagues reported in that patients receiving the combination of cabazitaxel plus abiraterone had a 27% reduction in the risk of progression or death. However, there was no significant difference in overall survival between the two arms, with a median OS of 25 months in the cabazitaxel+abiraterone arm and 26.9 months in the abiraterone arm, although the study was underpowered for this endpoint. Regarding the toxicity profile, the combination of cabazitaxel and abiraterone was overall well tolerated with more cytopenias, as expected. Dr. Neeraj Agarwal: Very nice summary of this abstract, Rana. I would like to add that the treatment landscape of patients with mHSPC has evolved since the design of the study and now includes combination therapies of ADT + ARPI with or without docetaxel, and ADT + docetaxel is no longer a standard of care, which limits the applicability of these results in clinical practice today. Dr. Rana McKay: Excellent point, Neeraj. Let’s discuss , titled “CYCLONE 2: A phase 3 study of abemaciclib with abiraterone in patients with metastatic castration-resistant prostate cancer”. Dr. Neeraj Agarwal: Sure! In the abstract featured at ASCO24, Dr. Matthew Smith and colleagues report the primary results of the trial, which was a randomized phase 2/3 study that investigated the combination of abemaciclib plus abiraterone versus abiraterone monotherapy in patients with mCRPC. Stratification factors included radiographic progression at study entry, presence of measurable disease, and prior docetaxel for mHSPC. Part 1 of the study established the recommended phase 2 dose of abemaciclib at 200 mg twice daily. In part 2, patients were randomized to placebo or abemaciclib, and an adaptive interim analysis using prespecified criteria was performed and recommended the expansion of the study to part 3. The primary endpoint was investigator-assessed radiographic progression-free survival by RECIST 1.1 and PCWG3 criteria in the intention-to-treat population. At the time of the primary analysis, adding abemaciclib to abiraterone did not improve rPFS, with a hazard ratio of 0.83. The median rPFS was 22 months for the combination arm and 20.3 months for the abiraterone arm. The combination was well tolerated, and the safety profile was consistent with the known adverse events. Dr. Rana McKay: So, the addition of abemaciclib to abiraterone did not improve outcomes in patients with mCRPC. These findings suggest that no further investigation is warranted for abemaciclib or CDK4/6 inhibitors in biomarker-unselected patients with prostate cancer. Dr. Neeraj Agarwal: Rana, what’s your take-home message on , titled “Health-related quality of life results from PRESTO (AFT-19), a phase 3 randomized trial of intensification of androgen blockade in patients with high-risk biochemically relapsed castration sensitive prostate cancer”? Dr. Rana McKay: So, as a reminder to our audience, the trial was a randomized phase 3 study that assessed the effects of intensified androgen receptor blockade in patients with biochemically recurrent prostate cancer following local therapies. Patients with a PSA doubling time of less than 9 months and no evidence of metastatic disease were randomized to receive either 52 weeks of ADT alone, ADT plus apalutamide, or ADT plus apalutamide plus abiraterone. In their published earlier this year in the Journal of Clinical Oncology, the authors showed that patients receiving ADT plus apalutamide with or without abiraterone had significantly longer PSA-progression-free survival than those receiving ADT alone. In the oral presentation featured at ASCO24, Dr. Ronald Chen and colleagues report health-related quality of life outcomes that were assessed using various questionnaires or scales at baseline, at cycle 7, which is around 6 months on...
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Top ASCO24 Abstracts That Could Revolutionize Oncology
06/26/2024
Top ASCO24 Abstracts That Could Revolutionize Oncology
Drs. John Sweetenham and Angela DeMichele discuss potentially ground-breaking abstracts in breast and lung cancer as well as notable research on artificial intelligence and its impact on cancer care, all of which were featured at the 2024 ASCO Annual Meeting. TRANSCRIPT Dr. John Sweetenham: Hello, I'm Dr. John Sweetenham from UT Southwestern's Harold C. Simmons Comprehensive Cancer Center and host of the ASCO Daily News Podcast. My guest today is Dr. Angela DeMichele, the Marianne and Robert McDonald Professor in Breast Cancer Research and co-leader of the Breast Cancer Program at the University of Pennsylvania's Abramson Cancer Center. Dr. DeMichele also served as the chair of the 2024 ASCO Annual Meeting Scientific Program. Today, she'll be sharing her reflections on the Annual Meeting and we'll be highlighting some advances and innovations that are addressing unmet needs and accelerating progress in oncology. Our full disclosures are available in the transcript of this episode. Dr. DeMichele, congratulations on a very robust and highly successful program at ASCO24, and thanks for joining us on the podcast today. Dr. Angela DeMichele: Well, thanks so much for having me, Dr. Sweetenham. It's a pleasure to be here. Dr. John Sweetenham: The presidential theme of the Annual Meeting this year was the "The Art and Science of Cancer Care: From Comfort to Cure." And this was certainly reflected throughout the meeting in Chicago that welcomed more than 40,000 attendees from across the globe. I know our listeners will be interested to hear some of your own reflections from the meeting now that we're on the other side of it, so to spea Dr. Angela DeMichele: Yes. Well, I will say that playing this role in the annual meeting really was a highlight of my career, and I feel so fortunate to have had the opportunity to do it. We had over 200 sessions, and in many, if not all of these sessions, we really tried to make sure that there was a case that really sort of grounded the session to really help people understand: you're going to hear about science, but how are you going to apply that? Who is the patient for whom this science really is important? We had over 7,000 abstracts submitted, and our 25 tracks and their chairs really pulled through to find really the best science that we could present this year. I think what you saw really was a representation of that across the board: incredible advances in lung cancer, breast cancer, melanoma, GI cancers; also really cutting-edge technologies: AI, as we'll talk about in a little while circulating markers like ctDNA, new drug development, new classes of drugs. So it was really an exciting meeting. I mean, some highlights for me, I would say, were certainly the Plenary, and we can talk a little bit about that. Also, we had a fantastic on “Drugging the “Undruggable Target: Successes, Challenges, and the Road Ahead.” And, if any of the listeners have not had a chance to hear this, it's really worth going in and watching this because it really brought together three amazing speakers who talked about the successes in KRAS, and then really, how are we using that success in learning how to target KRAS to now targeting a variety of other previously thought to be undruggable targets. I learned so much. And there's really both the academic and the pharma perspective there. So I'd really encourage watching this . The other session that I really thought was terrific was one that I was honored to chair, which was a fireside chat (“”) with both Dr. Monica Bertagnolli, who is the director of the NIH, and Dr. Kim Rathmell, who's now the director of the NCI. And boy, I'll tell you, these two incredibly smart, thoughtful, insightful women; it was a great conversation. They were really understanding of the challenges we face conducting research, practicing medicine. And maybe different from leadership at the NIH in the past, they've really taken the approach to say that everything they do is focused on the patient, and they don't limit themselves to just research or just science, that everything that the NIH does, and particularly the NCI does, really has to be focused on making sure we can give patients the best possible care. And I think they're being very thoughtful about building important infrastructure that's going to take us into the future, incorporating AI, incorporating new clinical trial approaches that are going to make it faster and easier to conduct clinical trials and to get the results that we need sooner. So just a few of the highlights, I think, from some really interesting sessions. Dr. John Sweetenham: It certainly was an extremely enriching and impactful ASCO24. And I think that the overall theme of the meeting was extremely well reflected in the content with this amazing mix of really, truly impactful science, along with a great deal of patient-centered healthcare delivery science to accompany it. So, I completely agree with you about that. There was a lot, of course, to take in over the five days of the meeting, but I'm sure that our listeners would be very interested to hear about one or two abstracts that really stood out for you this year. Dr. Angela DeMichele: Sure. I'm a breast cancer specialist, so I can't help but feel that the late breaking abstract, the trial, was really important for the field of breast cancer. So just briefly, this is a study of the antibody drug conjugate T-DxD, trastuzumab deruxtecan. This is a drug that is actually now approved in metastatic breast cancer, really effective in HER2-positive disease. But the question that this trial was trying to answer is, can this drug, which is built with the herceptin antibody against HER2, then linked to a chemotherapeutic molecule, can this work even in the setting of very, very low HER2 expression on a tumor? I think this is an incredibly important question in the field of antibody drug conjugates, of which there are now many across diseases, is how much of the target do you really need to have on the surface of the tumor? We had seen previously HER2 overexpressing tumors respond really well to this drug. HER2 tumors that have an intermediate level of expression were tested in the trial, and we saw that even those 2+ intermediate tumors responded well to this drug. The trial that was presented at ASCO was looking at this group of patients that have even less HER2 on the surface. So we typically measure HER2 by immunohistochemistry as 0, 1+, 2+, or 3+. And this was looking at patients whose tumors were over 0, but were at 1+ or below, so low and ultra-low. And it turned out that compared to treatment of physician’s choice, the drug really had quite a lot of activity, even in these patients who have very little HER2 on their tumors, really showing progression-free survival benefits in the HER2-low and HER2-ultra-low groups that were appreciable on the order of about 5 months, additional progression free survival hazard ratios around 0.6, so really demonstrating that utilizing an antibody drug conjugate, where you've got very little target, can still be a way to get that drug to a tumor. And I think it'll remain to be seen whether other ADCs can have activity at very low levels of IHC expression of whatever target they're designed against. I think one of the tricky things here for implementing this in breast cancer will be how do pathologists actually identify the tumors that are ultra-low because it's not something that we typically do. And so we’ll go through a period, I think, of adjustment here of really trying to understand how to measure this. And there are a bunch of new technologies that I think will do a better job of detecting low levels of the protein on the surface of the tumor because the current IHC test really isn't designed to do that. It was only designed to be focused on finding the tumors that had high levels. So we have some newer technologies with immunofluorescence, for example, that can really get down to very low levels. And I think this is going to be a whole new area of ADCs, target detection – how low can you go to still see activity? So I thought that this was an important abstract for many reasons. I will just say the second area that I was really particularly impressed with and had a big impact on me were the two lung cancer abstracts that were presented in the Plenary, the trial (LBA4) and the trial (LBA5). And I think, I've been in the field of oncology for 30 years now, and when I started in the late ‘90s, lung cancer was a disease for which we had very few treatments. If we didn't catch it early and surgery wasn't possible for non-small cell lung cancer, really, it was a horrible prognosis. So we knew this year was the 20th anniversary of the discovery of EGFR as a subtype of lung cancer. That was really, I think, a turning point in the field of non-small cell lung cancer – finding a target. And now seeing the trial show that osimertinib really had such an enormous impact on progression-free survival amongst these patients who had EGFR-positive non-small cell lung cancer, progression-free survival hazard ratio of 0.16; there was a standing ovation. And one of the really big privileges of being the Scientific Program Chair is getting to moderate the Plenary Session, and it's a really amazing experience to be standing up there or sitting there while the presenter is getting a standing ovation. But this was well deserved because of the impact this is having on patients with EGFR positive lung cancer. And it was similar with the trial, which looked at the benefits of adding immunotherapy in limited-stage small-cell lung cancer. Again, a disease that treatment has not changed in 30 years, and so the addition of durvalumab to the standard backbone of chemotherapy for small cell lung cancer had its survival advantage. These patients are living longer and it was really an impressive improvement. And I think it really underscores just the revolution that has happened in lung cancer between targeted therapy and immunotherapy has completely changed the prognosis for patients with this disease. So to me, these were really landmark reports that came out at ASCO that really showed us how far we've come in oncology. Dr. John Sweetenham: Yeah, absolutely. I think that, as you mentioned, those results are truly remarkable, and they reflect extraordinary advances in science. I think we see that both in terms of the therapeutic arena, but also, I think we've started to see it in other areas as well, like symptom control, remote patient monitoring, and so on and so forth, where some of the newer virtual technologies are really having major impacts as well. Dr. Angela DeMichele: Yes, we really wanted to have a focus on artificial intelligence in this meeting, because it's having such an enormous impact on our field in everything from care delivery to diagnostics. I'd love to hear what you thought was the most interesting, because there really was just new data across the board presented. Dr. John Sweetenham: I've actually chosen 3 abstracts which I thought were particularly interesting for a couple of reasons, really. They're all based on virtual health interventions, and I think they're interesting in really reflecting the theme of the meeting, in that they are extremely advanced technology involved in the virtual platforms, a couple of which are artificial intelligence, but very impactful to patients at the same time in terms of remote symptom control, in terms of addressing disparities, and in one case, even influencing survival. So I thought these were three really interesting abstracts that I'll walk the listeners through very quickly. The first of these was a study, Abstract 1500 (“”) which looked at an artificial intelligence-based virtual dietitian for patients with cancer. This is based on the fact that we know nutritional status to be a key driver of patient experience and of cancer outcomes. And as the authors of the presentation noted, 80% of patients look for nutritional support, but many of them don't get it. And that's primarily a workforce issue. And I think that's an important thematic point as well, that these new technologies can help us to address some of the workforce issues we have in oncology. So this was an AI-based platform developed by experts in nutrition and cancer patients, based on peer reviewed literature, and a major effort in terms of getting all of these data up together. And they developed an artificial intelligence platform, which was predominantly text message based. And this platform was called INA. And as this is developing as a platform, there's a machine learning component to it as well. So in theory, it's going to get better and better and better over time. And what they did in their was they looked at little over 3,000 patients across the entire country who were suffering from various types of cancer, GU, breast, gynecological malignancy, GI and lung. And most of them had advanced-stage disease, and many of them had nutritional challenges. For example, almost 60% of them were either overweight or obese by BMI. And the patients were entered into a text exchange with the AI platform, which would give them advice on what they should eat, what they shouldn't eat. It would push various guidance and tips to them, it would develop personalized recipes for them, and it would even develop menu plans for the patients. And what's really interesting about this is that the level of engagement from the patients was very high, with almost 70% of patients actually texting questions to this platform. About 80% of the patients completed all of the surveys, and the average time that patients interacted with the platform was almost nine months, so this was remarkable levels of engagement, high levels of patient satisfaction. And although at this point, I think it's very early and somewhat subjective, there was certainly a very positive kind of vibe from patients. Nearly 50% have used the recommended recipes. More than 80% of them thought that their symptoms improved while they were using this platform. So I think as a kind of an assistant for remote management of patients, it's really remarkable. And the fact that the level of engagement was so high also means that for those patients, it's been very impactful. The second one, this was Abstract 100 (“”) looked again at an AI-based platform, which in this case was used in an underserved population to address healthcare disparities. This is a from New York which was looking at colorectal cancer screening disparities amongst an underserved population, where historically they've used skilled patient navigators to address compliance with screening programs, in this case specifically for colorectal cancer. And they noticed in the background to this that in their previous experience in 2022, almost 60% of patients either canceled or no-showed for colonoscopy appointments. And because of this and because of the high burden of patients that this group has, they decided to take an AI-based virtual patient navigator called MyEleanor and introduce this into their colorectal cancer screening quality improvement. And so they introduced this platform in April of 2023 through to the end of the year, and their plan was to target reengagements of around 2,500 patients who had been non adherent with colonoscopy appointments in a previous year. And so the platform MyEleanor would call the patients to discuss rescheduling, it would assess their barriers to uptake, it would offer live transfer to somebody to schedule for them, and then it would go on closer to the point of the colonoscopy to call the patients and give them advice about their prep. And it was very nuanced. The platform would speak in both English and Spanish versions. It could detect nuances in the patient's voice, which might then trigger it to refer the patient to a live agent rather than the AI platform. So, very sophisticated technology. And what was most interesting about this, I think, was that over the eight months of the study, around 60% of patients actually engaged with this platform, with almost 60% of that group, or 33% overall, accepting a live transfer and then going on to scheduling, so that the completion rate for the no show patients went from 10% prior to the introduction of this platform to 19% after it was introduced. So [this is] another example, I think, of something which addresses a workforce problem and also addresses a major disparity within cancer care at the moment by harnessing these new technologies. And I think, again, a great interaction of very, very high-level science with things that make a real difference to our patients. So, Dr. DeMichele, those are a couple of examples, I think, of early data which really are beginning to show us the potential and signal the impact that artificial intelligence is going to have for our patients in oncology. I wonder, do you have any thoughts right now of where you see the biggest impact of artificial intelligence; let's say not in 20 years from now, but maybe in the next year or two? Dr. Angela DeMichele: Well, I think that those were two excellent examples. A really important feature of AI is really easing the workload on physicians. And what I hope will happen is that we'll be able to use AI in the very near future as a partner to really offload some of the quite time-consuming tasks, like charting, documentation, that really take us away from face-to-face interaction with patients. I think this has been a very difficult period where we move to electronic medical records, which are great for many reasons, but have really added to the burden to physicians in all of the extra documentation. So that's one way, I think, that we will hope to really be able to harness this. I think the other thing these abstracts indicate is that patients are very willing to interact with these AI chatbots in a way that I think, as you pointed out, the engagement was so high. I think that's because they trust us to make sure that what we're doing is still going to be overseen by physicians, that the information is going to get to us, and that they're going to be guided. And so I think that in areas where we can do outreach to patients, reminders, this is already happening with mammograms and other sorts of screening, where it's automated to make sure you're giving reminders to patients about things that they need to do for some of their basic health maintenance. But here, really providing important information – counseling that can be done by one of these chatbots in a way that is compassionate, informative and does not feel robotic to patients. And then I was really impressed with, in the on the screening colonoscopy, the ability of the AI instrument to really hear nuances in the patient's responses that could direct them directly to a care provider, to a clinician, if they thought that there might be some problem the patient was experiencing. So again, this could be something that could be useful in triaging phone calls that are coming in from patients or our portals that just feel like they are full of messages, no matter how hard you try to clear them all out, to get to them all. Could we begin to use AI to triage some of the more mundane questions that don't require a clinician to answer so that we can really focus on the things that are important, the things that are life threatening or severe, and make sure that we're getting to patients sooner? So there's just a few ways I really hope it'll help us. Dr. John Sweetenham: Yeah, absolutely. I think we're just scratching the surface. And interestingly enough, in my newsfeed this morning through...
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Enhancing Treatment Efficacy in Multiple Myeloma at ASCO24
06/24/2024
Enhancing Treatment Efficacy in Multiple Myeloma at ASCO24
Drs. John Sweetenham and Marc Braunstein discuss practice-changing studies in hematologic malignancies that were featured at the 2024 ASCO Annual Meeting, including the ASC4FIRST trial in chronic myeloid leukemia and IMROZ and CARTITUDE-4 in multiple myeloma. TRANSCRIPT Dr. John Sweetenham: Hello, I'm Dr. John Sweetenham from UT Southwestern’s Harold C. Simmons Comprehensive Cancer Center and host of the ASCO Daily News Podcast. On today's episode, we'll be discussing practice-changing abstracts and other key advances in hematological malignancies that were featured at the 2024 ASCO Annual Meeting. Joining me for this discussion is an old friend, Dr. Marc Braunstein, a hematologist and oncologist from the NYU Langone Perlmutter Cancer Center. Our full disclosures are available in the transcript of this episode. Marc, it’s great to have you back on the podcast again. There were some important studies in the heme space at the Annual Meeting this year, and we're very pleased that you're able to share your takeaways. Dr. Marc Braunstein: Thank you, John. It's great to be back again. Dr. John Sweetenham: Let's start out, Marc, with . This abstract reports the primary results of the trial, and this was a trial comparing asciminib with investigator selected tyrosine kinase inhibitors in newly diagnosed patients with chronic myeloid leukemia. Could you tell us a little about the trial and how you think it's going to impact clinical practice? Dr. Marc Braunstein: Absolutely. So, asciminib is an oral tyrosine kinase of the ABL kinase domain. As we know in CML, the BCR-ABL translocation is characteristic of the disease, and asciminib is approved for chronic phase CML with a T315I resistance mutation or for patients who have received 2 or more prior lines of therapy. So the trial was a randomized trial of 405 patients with newly diagnosed chronic phase CML who are randomized one to one to receive either asciminib at 80 milligrams once daily, or investigator’s choice of a first generation TKI imatinib or one of three second generation TKIs nilotinib, dasatinib, or bosutinib. The primary endpoint of the study was the major molecular response, or MMR, at 48 weeks. Pretty much, the study met its primary endpoint with a 67% rate of MMR at 48 weeks, with asciminib versus 49% in patients treated with the investigator's choice of TKI. And in addition, the major molecular remission or MMR of 4.5, which is a deep remission, those rates were higher as well, with asciminib versus investigator’s choice at a rate of 39% versus 21% when comparing the groups. Furthermore, when we looked at toxicity, there were fewer grade 3 or higher adverse events, with the asciminib at 38% versus either 44% with the first generation, or 55% with the second generation TKI, and fewer discontinuations as well with asciminib. So I think this is practice-changing. I think it offers compelling data to use asciminib upfront for chronic phase CML. Those who don't agree with that sentiment might argue that we want to see longer term follow up. There's a planned follow-up at 96 weeks. We would want to see the rate of progression to acute myeloid leukemia and of course overall survival as well. But I think the abstract certainly shows an improvement in outcomes with asciminib versus our current array of TKIs. Dr. John Sweetenham: Yeah, I think it certainly is, at least at minimum, potentially practice changing. I agree with you. Just one question, and this may be a little bit speculative, but do you have any thoughts about treatment free survival with asciminib and how that might line up against some of the other TKIs? Dr. Marc Braunstein: Yeah, that's a great question. The abstract did not necessarily address that, patients were treated until progression, but we know that with the current landscape of TKIs, that in patients who have achieved a deep MR of 4 or 4.5 for at least 2 years who discontinue their TKI, the rate of relapse is about 50%. The current study, the , doesn't address that, but I think it's a really good question about whether, for those patients who have achieved a deep remission, whether they can eventually stop asciminib down the line. Dr. John Sweetenham: Yeah, I guess it's one of those ‘watch this space’ things. So we'll see how the data mature out. And let's move on to what I think is another potentially practice-changing study, at least in certain parts of the world. And that's [the] study in classical Hodgkin lymphoma. As you remember, this was a German Hodgkin lymphoma study group trial which looked at the tolerability and efficacy of a novel regimen, BrECADD versus eBEACOPP for patients with advanced stage classical Hodgkin lymphoma in their study, which is known as GHSG HD21. Can you give us your thoughts and take home messages from this trial? Dr. Marc Braunstein: Yeah, John, absolutely. So the German study is a phase 3 study of 1,500 patients with classical Hodgkin lymphoma. The majority were stage 3 or 4, 84%, that compared two regimens BEACOPP to BrECADD. The major difference between these 2 groups being that the newer BrECADD regimen swaps out bleomycin for brentuximab vedotin, which is an anti-CD30 antibody drug conjugate. Also, in the BrECADD regimen they eliminate vincristine that's incorporated into BEACOPP. Those are kind of the global differences between these 2 regimens. And when comparing these, they looked at the primary endpoint of progression-free survival. Of note, in this study there was a PET adjusted approach where if patients achieved interim PET negativity after 2 cycles, that was followed by an additional 2 cycles of their treatment as opposed to 4 cycles if they were PET positive after the initial 2 cycles of their respective treatment. And of note, there were similar rates of PET2 negativity between both arms, about 58% in both arms. So at a median follow-up of 48 months, the 4-year progression-free survival was significantly better with the brentuximab containing BrECADD regimen at 94% versus 91% with a hazard ratio of 0.66. And the overall survival of the BrECADD arm was 98.6%, which is very high and impressive. The 4-year overall survival was similar between the arms at around 98%, but of note, there were fewer severe adverse events with BrECADD, the brentuximab containing arm versus BEACOPP at about 42% versus 59% and interestingly less peripheral neuropathy with the brentuximab containing BrECADD. So we're doing extremely well in treating advanced stage classical Hodgkin lymphoma. So the bar is set very high. But in this study, the rates of progression-free survival and overall survival are very impressive. While these intensive regimens tend to be used outside of the U.S., there are several notable benefits of the study, including greater than 50% PET2 negativity and high rates of progression-free survival at 4 years. In discussing this abstract, it's worth noting that there are other competing regimens, if you want to call it that, that are more commonly used in the U.S. So the ECHELON-1 study looked at brentuximab AVD compared with ABVD with bleomycin and it was a 94% versus 89% 6-year overall survival rate favoring the brentuximab containing A+AVD regimen. And lastly, more recently, the study that hasn't been published but was presented in abstract form looked at nivolumab AVD versus brentuximab AVD at a median follow up of 12 months showed a progression-free survival of 94% versus 86%. And that study still has yet to be published and needs to mature. But both of those regimens are in the NCCN guidelines. So, we're definitely pushing the bar higher in terms of improving responses in treating advanced classical Hodgkin lymphoma. Dr. John Sweetenham: I think that there's no question that these results from BrECADD are very impressive. But I'm taken back to what I think has been a kind of philosophic discussion in Hodgkin lymphoma now for a number of years about balancing disease control and efficacy against the potential short-term and long-term toxicity of the regimens, particularly when you have very effective salvage therapies for those patients who may suffer a relapse. So I think that this is a discussion over whether you take a very intensive, upfront approach to Hodgkin lymphoma versus something that may be less and slightly less intensive. I suspect that's a discussion that's going to continue for a long time. I don't know what you feel, but my own feeling about this is that this study will likely have a major influence over treatment of Hodgkin lymphoma, particularly in western Europe. Less likely in the US.., I would think. I don't know what your thoughts about that are. Dr. Marc Braunstein: Well, it's a great question. In , that study did include pediatric patients. In , the median age was 31 and did not include pediatric patients. So I think we have to be selective in terms of fitness and which patients may be better suited for different regimens. But I think what all these studies show is certainly when we incorporate novel immunotherapies, whether it's brentuximab vedotin, nivolumab, we improve progression-free survival and even overall survival. Dr. John Sweetenham: Absolutely. So let's shift gears now and take a look at Abstract 7500, the study. This was the study of isatuximab, bortezomib, lenalidomide and dexamethasone versus VRD alone for transplant ineligible patients with newly diagnosed multiple myeloma. I know we discussed this in our preview podcast a few weeks back, Marc, but I just wonder now, having seen the data in more detail, what do you think of the important takeaways? And again, are we looking at a new standard of care? Dr. Marc Braunstein: You know, there are many standards of care in multiple myeloma, but we're always looking to make improvements on the regimens we have at our disposal. So, just to recap, is a phase 3 randomized study of the anti-CD38 monoclonal antibody isatuximab with the backbone of bortezomib, lenalidomide, dexamethasone or VRD versus VRD alone, specifically, in transplant ineligible newly diagnosed multiple myeloma patients age less than 80. They studied 446 patients in this study, randomized 3 to 2 to Isa-VRD versus VRD alone, with the primary endpoint of progression free survival. Now, similar to other studies where they included a monoclonal antibody up front, the study met its primary endpoint of improving progression-free survival with the quad regimen containing the monoclonal antibody isatuximab versus VRD alone. So what was interesting about the , it's really the first of its kind to be presented that specifically looked at transplant ineligible patients, which is presumably a less fit or perhaps more frail population that wouldn't go on to consolidation with stem cell transplant. And in this study, the progression-free survival at 5 years was 63% versus 45%, clearly superior when you included isatuximab. And the rates of complete remission and MRD negativity were all significantly improved, too. However, that was also met with slightly more grade 3 or higher treatment emergent adverse events, 92% versus 84% in the control arm. There are also 11% grade 5 treatment emergent adverse events with the isatuximab group versus 5.5% with VRD alone. Although there was no major difference in treatment discontinuation. One small caveat worth noting, too, is that high-risk patients in this study, when presented at ASCO, did not necessarily show a difference in benefit, although there wasn't necessarily a detriment either. So, John, I think that clearly quadruplet regimens are superior in outcomes of efficacy to triplets, even in transplant-ineligible patients. But I think we have to tailor these treatments to individual patients because I think when it comes to transplant-ineligible patients, it's a spectrum of patients who may be more or less fit for quad regimens versus triplet regimens. It's also worth noting, though, that in this study, the patients are really only getting a quad regimen for 4 cycles. They get their Isa-VRD, and then you drop the bortezomib. So when we think about quads, it's not that they're getting the quad regimen indefinitely, it's really for the induction cycles. But still, I think we have to be aware of potential safety issues. Dr. John Sweetenham: Okay, great. And let's stay on the theme of multiple myeloma, Marc, and talk a little bit about Abstract 7504, which was a subgroup analysis of the study. This is a report on the use of ciltacabtagene autoleucel versus standard of care in patients with functional high risk multiple myeloma. Can you give us your thoughts on this and maybe put it into a bit of context for us? Dr. Marc Braunstein: Absolutely, John. It's really a great time to be in the field of multiple myeloma. We're making tremendous progress, but when we think about one of the unmet needs, it's just consistently the high-risk patients who have shorter responses and are at higher risk for poorer outcomes. Just to review, cilta-cel is one of the 2 available anti-BCMA CAR T-cell products available for the treatment of relapsed or refractory multiple myeloma. Very recently, the FDA approved cilta-cel for lenalidomide refractory patients after 2 or more prior lines of therapy based on the CARTITUDE-4 study, which was published by San-Miguel and colleagues in New England Journal of Medicine in July 2023. And that randomized 419 patients with multiple myeloma with 1 to 3 prior lines of therapy to receive either cilta-cel or physician's choice of standard of care, which was either 1 of 2 triplet regimens, a pomalidomide, bortezomib, dexamethasone or daratumumab, pomalidomide and dexamethasone. It's worth noting that about 25% of the patients in the CARTITUDE-4 study had prior anti-CD38 antibody treatment previously and the carfilzomib was not included in one of the standard-of-care arms, and we know that those regimens containing carfilzomib do increase survival in relapsed myeloma. Nevertheless, the primary outcome of progression-free survival was not reached in the CAR T-cell arm versus 11.8 months in the standard-of-care arm, with a significant reduction in progression of 74%. So clearly a positive study and CAR T-cell therapy is included in the NCCN guidelines for patients who have an early relapse from their myeloma. The current by Costa et al focused specifically on a subgroup of 79 patients from CARTITUDE-4 in second line of treatment and looked at what they called functional high-risk myeloma, defined as progression of disease within 18 months of initial treatment or after stem cell transplant. Again, the study showed a retained benefit of cilta-cel with significant improvement in progression-free survival either not reached or 12 months with the control standard of care arm, as well as complete remission rate and rates of MRD negativity of 65% versus 10% in the control. The overall survival outcome was still immature and not presented. Nevertheless, cilta-cel is clearly superior to standard-of-care triplet regimens. I think that for patients with high risk, they clearly derive a benefit from CAR T-cell therapy if they have short progression-free survival after initial therapy. Dr. John Sweetenham: Thanks, Marc. So let's round this out by talking about another area of unmet need, I guess in a way in a difficult to treat patient group. And that's Abstract 7007, the study. This is a study which looks at the efficacy and safety of ibrutinib and venetoclax in patients with mantle cell lymphoma who had a mutated TP53. Can you just briefly review this for us and tell us what you think we should be taking away from this studys? Dr. Marc Braunstein: So, mantle cell lymphoma typically has an aggressive behavior, but the subgroup of patients with a P53 mutation tend to have the poorest outcomes and do represent an area of unmet need. Although BTK inhibitors are making important improvements in mantle cell lymphoma, they have yet to be approved in newly diagnosed mantle cell lymphoma. Acalibutinib and zanubrutinib are FDA-approved BTK inhibitors for previously treated mantle cell lymphoma. Ibrutinib was withdrawn from the market in the U.S. for mantle cell lymphoma. Dr. Michael Wang's group presented late-breaking data from the phase 3 trial at ASH 2023, in which 267 patients with relapsed refractory mantle cell lymphoma were randomized to receive either ibrutinib plus the BCL2 inhibitor venetoclax or ibrutinib plus placebo after 1 to 5 prior lines of therapy. And that study showed a 32 versus 22 months progression-free survival at a median follow up of 51 months. The current , also by Dr. Wang and colleagues, looked at the subgroup of patients who had a P53 mutation and included an open label cohort of 44 patients in the first line of treatment and a relapse refractory cohort of 75 patients, and compared this subgroup of patients with P53 mutation to those without. When we look at the outcomes, the patients who did not have a P53 mutation clearly did better in terms of progression-free survival being not reached in first-line treatment compared to 22 months progression-free survival in those patients with first-line [treatment] with a P53 mutation. As well as in the relapsed refractory setting, the PFS without the P53 mutation was 47 months versus 21 months with the mutation. However, when you look at these patients treated with ibrutinib and venetoclax comparing whether they got treated in first line or the relapse refractory setting, the overall response rates are very similar at about 80% to 90% and the CR rates were very similar at about 55% to 58%, which to me suggests that although patients with P53 mutation do worse than those without it, whether they're treated in the first-line or the relapse setting with this combination of venetoclax, they tend to do somewhat similar, suggesting that you can overcome resistance to prior therapy in the relapse setting. So I think further data are certainly warranted to explore the role of combination therapies that include novel agents such as BTK inhibitors in the first line setting. It's worth noting that the study was recently published, and this study looked at including ibrutinib at various phases, including at induction in combination with intensive chemotherapy and during the maintenance phase. And that study showed encouraging outcomes in patients who received ibrutinib even without stem cell transplant compared to those who received stem cell transplant. So the role of BTKIs in mantle cell lymphoma is certainly evolving, and I think it offers a very effective intervention without the same kind of toxicities we see with cytotoxic chemotherapy that's traditionally used in mantle cell lymphoma. But I think the subgroup of patients with P53 mutation in this disease still represent an area of unmet need that unfortunately have worse outcomes. But novel agents may be able to overcome some of those adverse outcomes. Dr. John Sweetenham: Yeah, I agree. I think these are intriguing data, and obviously it needs more follow-up and probably more prospective studies. But nevertheless, I think there are some signals there for sure that need to be followed up on. Marc, as always, it's great to have your insights on key advances in the heme space from ASCO. An important year this year, and we really appreciate your time and effort in sharing with us your thoughts on what we've learned this year. So thank you as always. Dr. Marc Braunstein: My pleasure. Dr. John Sweetenham: And thank you to our listeners for joining us today. You'll find links to the abstract discussed today in the transcript of this episode. Finally, if you value the insights that you hear on the ASCO Daily News Podcast, please take a moment to rate, review and subscribe wherever you get your podcasts. Disclaimer: The purpose of...
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ASCO24: Transforming the Lung Cancer Treatment Landscape
06/21/2024
ASCO24: Transforming the Lung Cancer Treatment Landscape
Drs. Vamsi Velcheti and Nathan Pennell discuss novel approaches and key studies in lung cancer that were showcased at the 2024 ASCO Annual Meeting, including the Plenary abstracts LAURA and ADRIATIC. TRANSCRIPT Dr. Vamsi Velcheti: Hello, I am Dr. Vamsi Velcheti, your guest host for the ASCO Daily News Podcast today. I'm a professor of medicine and director of thoracic medical oncology at the Perlmutter Cancer Center at NYU Langone Health. Today, I'm joined by Dr. Nate Pennell, the co-director of the Cleveland Clinic Lung Cancer Program and the vice chair of clinical research at the Taussig Cancer Center in Cleveland Clinic. Dr. Pennell is also the editor-in-chief of the ASCO Educational Book. Today, we will be discussing practice-changing abstracts and the exciting advances in lung cancer that were featured at the ASCO 2024 Annual Meeting. You'll find our full disclosures in the transcript of the episode. Nate, we're delighted to have you back on the podcast today. Thanks for being here. It was an exciting Annual Meeting with a lot of important updates in lung cancer. Dr. Nate Pennell: Thanks, Vamsi. I'm glad to be back. And yes, it was a huge year for lung. So I'm glad that we got a chance to discuss all of these late-breaking abstracts that we didn't get to talk about during the prelim podcast. Dr. Vamsi Velcheti: Let's dive in. Nate, it was wonderful to see all the exciting data, and one of the abstracts in the Plenary Session caught my attention, . In this , the investigators did a comparative large-scale effectiveness trial of early palliative care delivered via telehealth versus in-person among patients with advanced non-small cell lung cancer. And the study is very promising. Could you tell us a little bit more about the and your take-home messages? Dr. Nate Pennell: Yes, I think this was a very important . So just to put things in perspective, it's now been more than a decade since Dr. Jennifer Temel and her group at Massachusetts General Hospital did a randomized study that showed that early interventions with palliative medicine consultation in patients with advanced non-small cell lung cancer significantly improves quality of life and in her initial study, perhaps even overall survival. And since then, there have been numerous studies that have basically reproduced this effect, showing that getting palliative medicine involved in people with advanced cancer, multiple different cancer types, really, has benefits. The difficulty in applying this has been that palliative care-trained specialists are few and far between, and many people simply don't have easy access to palliative medicine-trained physicians and providers. So with that in mind, Dr. Temel and her group designed a randomized study called the REACH PC trial, where 1,250 patients were randomized with advanced non-small cell lung cancer to either in-person palliative medicine visits which is sort of the standard, or one in-person assessment followed by monthly telemedicine video visits with palliative medicine. Primary endpoint was essentially to show that it was equivalent in terms of quality of life and patient satisfaction. And what was exciting about this was that it absolutely was. I mean, pretty much across the board in all the metrics that were measured, the quality-of-life, the patient satisfaction, the anxiety and depression scores, all were equivalent between doing telemedicine visits and in-person visits. And this hopefully will now extend the ability to get this kind of benefit to a much larger group of people who don't have to geographically be located near a palliative medicine program. Dr. Vamsi Velcheti: Yeah, I think it's a great , Nate and I actually was very impressed by the ASCO committee for selecting this for the Plenary. We typically don't see supportive care studies highlighted in such a way at ASCO. This really highlights the need for true interdisciplinary care for our patients. And as you said, this study will clearly address that unmet need in terms of providing access to palliative care for a lot of patients who otherwise wouldn't have access. I'm really glad to see those results. Dr. Nate Pennell: It was. And that really went along with Dr. Schuchter’s theme this year of bringing care to patients incorporating supportive care. So I agree with you. Now, moving to some of the other exciting abstracts in the Plenary Session. So we were talking about how this was a big year for lung cancer. There were actually 3 lung cancer studies in the Plenary Session at the Annual Meeting. And let's move on to the second one, , the study. This was the first phase 3 study to assess osimertinib, an EGFR tyrosine kinase inhibitor, in patients with EGFR mutant, unresectable stage III non-small cell lung cancer. What are your takeaways from this study? Dr. Vamsi Velcheti: This is certainly an exciting , and all of us in the lung community have been kind of eagerly awaiting the results of the study. As you know, for stage III non-small cell lung cancer patients who are unresectable, the standard of care has been really established by the study with the consolidation durvalumab after definitive concurrent chemoradiation. The problem with that study is it doesn't really answer the question of the role of immunotherapy in patients who are never-smokers, and especially in patients who are EGFR positive tumors, where the role of immunotherapy in a metastatic setting has always been questioned. And in fact, there have been several studies as you know, in patients with EGFR mutation positive metastatic lung cancer where immunotherapy has not been that effective. In fact, in the subgroup analysis in the PACIFIC study, patients with EGFR mutation did not really benefit from adding immunotherapy. So this is an interesting study where they looked at patients with locally advanced, unresectable stage III patients and they randomized the patients 2:1 to osimertinib versus placebo following concurrent or sequential tumor radiation. The primary endpoint for the study was progression free survival, and a total of 216 patients were enrolled and 143 patients received a study treatment, which is osimertinib, and 73 received placebo. And 80% of the patients on the placebo arm crossed over to getting treatment at the time of progression. So most of us in the lung cancer community were kind of suspecting this would be a positive trial for PFS. But however, I think the magnitude of the difference was truly remarkable. The median PFS in the osimertinib arm was 39.1 months and placebo was 5.6 months and the hazard ratio of 0.16. So it was a pretty striking difference in terms of DFS benefit with the osimertinib consolidation following chemoradiation. So it was truly a positive study for the primary endpoint and the benefit was seen across all the subgroups and the safety was no unexpected safety signals other than a slight increase in the radiation pneumonitis rates in patients receiving osimertinib and other GI and skin tox were kind of as expected. In my opinion, it's truly practice changing and I think patients with EGFR mutation should not be getting immunotherapy consolidation post chemoradiation. Dr. Nate Pennell: I completely agree with you. I think that this really just continues the understanding of the use of osimertinib in EGFR-mutant lung cancer in earlier stages of disease. We know from the trial, presented twice in the Plenary at the ASCO Annual Meeting, that for IB, stage II and resectable IIIA, that you prolong progression free or disease free survival. So this is a very similar, comparable situation, but at an even higher risk population or the unresectable stage III patients. I think that the most discussion about this was the fact that the osimertinib is indefinite and that it is distinct from the adjuvant setting where it's being given for three years and then stopped. But I think all of us had some pause when we saw that after three years, especially in the stage III patients from , that there were clearly an increase in recurrences after stopping the drug, suggesting that there are patients who are not cured with a time limited treatment, or at least with 3 years of treatment. The other thing that is sobering from the study, and was pointed out by the discussant, Dr. Lecia Sequist, is if you look at the two-year disease-free survival in the placebo arm, it was only 13%, meaning almost no one was really cured with chemo radiation alone. And that really suggests that this is not that different from a very early stage IV population where indefinite treatment really is the standard of care. I wonder whether you think that's a reasonable approach. Dr. Vamsi Velcheti: I completely agree with you, Nate, and I don't think we cure a majority of our patients with stage III, and less so in patients who have EGFR-mutant, stage III locally advanced. As you just pointed out, I think very few patients actually make it that far along. And I think there's a very high rate of CNS micrometastatic disease or just systemic micrometastatic disease in this population that an effective systemic therapy of osimertinib can potentially have long term outcomes. But again, we perhaps don't cure a vast majority of them. I think that the next wave of studies should incorporate ctDNA and MRD-based assays to potentially identify those patients who could potentially go off osimertinib at some point. But, again, outside of a trial, I would not be doing that. But I think it's definitely an important question to ask to identify de-escalation strategies with osimertinib. And even immunotherapy for that matter, I think we all know that not all patients really require years and years of immunotherapy. They're still trying to figure out how to use immunotherapy in these post-surgical settings, using the MRD to de-escalate adjuvant therapies. So I think we have to have some sort of strategy here. But outside of a clinical trial, I will not be using those assays here to cite treatments, but certainly an important question to ask. Moving on to the other exciting late-breaking abstracts, , the study. This is another study which was also in the plenary session. This study was designed to address this question of consolidation immunotherapy, post chemo radiation for limited-stage small cell cancer, the treatment arms being durvalumab tremelimumab, and durvalumab observation. So what do you think about the study? This study also received a lot of applause and a lot of attention at the ASCO meeting. Dr. Nate Pennell: It was. It was remarkable to be there and actually watch this study as well as the LAURA study live, because when the disease free survival curves and in the study, the overall survival curves were shown, the speakers were both interrupted by standing ovation of applause just because there was a recognition that the treatment was changing kind of before our eyes. I thought that was really neat. So in this case, I think this is truly a historic study, not necessarily because it's going to necessarily be an earth shakingly positive study. I mean, it was clearly a positive study, but more simply because of the disease in which it was done, and that is limited-stage small cell lung cancer. We really have not had a change in the way we've treated limited-stage small cell lung cancer, probably 25 years. Maybe the last significant advances in that were the advent of concurrent chemotherapy and radiation and then the use of PCI with a very modest improvement in survival. Both of those, I would say, are still relatively modest advances. In this case, the addition of immunotherapy, which we know helps patients with small cell lung cancer - it's of course the standard of care in combination chemotherapy for extensive stage small cell lung cancer - in this case, patients who completed concurrent chemo radiation were then randomized to either placebo or durvalumab, as well as the third arm of durvalumab tremelimumab, which is not yet been recorded, and co primary endpoints were overall survival and progression free survival. And extraordinarily, there was an improvement in overall survival seen at the first analysis, with a median overall survival of 55.9 months compared to 33.4 months, hazard ratio of 0.73. So highly clinically and statistically significant, that translates at three years to a difference in overall survival of 56.5%, compared to 47.6%, or almost 10% improvement in survival at three years. There was also a nearly identical improvement in progression-free survival, also with a hazard ratio of 0.76, suggesting that there's a modest number of patients who benefit. But it seems to be a clear improvement with the curves plateauing out. In my opinion, this is very comparable to what we saw with the study in stage III, unresectable non-small cell lung cancer, which immediately changed practice back when that first was reported. And I expect that this will change practice pretty much immediately for small cell as well. Dr. Vamsi Velcheti: Yeah, I completely agree, Nate. I think it's an exciting advance in patients with limited-stage small cell lung cancer. For sure, it's practice-changing, and I think the results were exciting. So one thing that really intrigued me was in the extensive-stage setting, the benefit was very mediocre with one-to-two month overall survival benefit in both the and in trial. Here we are seeing almost two-year of median OS benefit. I was kind of puzzled by that, and I thought it may have to do with patients receiving radiation. And we've seen that with the , and makes you wonder if both the and the studies actually did not allow consolidation thoracic radiation. Hypothetically, if they had allowed consolidation thoracic radiation, perhaps we would have seen better outcomes. Any thoughts on that? Dr. Nate Pennell: We've been trying to prove that radiation and immunotherapy somehow go together better for a long time. Going back to the first description of the abscopal effect, and I'm not sure if I necessarily believe that to be the case, but in this setting where we truly are trying to cure people rather than merely prolong their survival, maybe this is the situation where it truly is more beneficial. I think what we're seeing is something very similar to what we're seen in , where in the stage IV setting, some people have long term survival with immunotherapy, but it's relatively modest. But perhaps in the curative setting, you're seeing more of an impact. Certainly, looking at these curves, we'll have to see with another couple of years to follow up. But a three-year survival of 56% is pretty extraordinary, and I look forward to seeing if this really maintains over the next couple of years follow up. Moving beyond the Plenary, there were actually lots of really exciting presentations, even outside the Plenary section. One that I think probably got at least as much attention as the ones that we've already discussed today was actually an update of an old trial that's been presented for several prior years. And I'm curious to get your take on why you thought this was such a remarkable study. And we're talking about the , which was the 5-year update from the study, which looked at previously untreated ALK-positive advanced non-small cell in cancer patients randomly assigned to lorlatinib, the third generation ALK inhibitor, versus crizotinib, the first generation ALK inhibitor. What was so exciting about this study, and why were people talking about it? Dr. Vamsi Velcheti: Yeah, I agree, Nate. We've seen the data in the past, right? Like on the CROWN data, just first like a quick recap. This is the CROWN study, like the phase 3 study of third generation ALK inhibitor lorlatinib. So global randomized phase 3 study in patients with metastatic disease randomized to lorlatinib versus crizotinib, which is a controller. So the primary endpoint was PFS, and we've seen the results in the past of the CROWN readout quoted, with a positive study and the lorlatinib received FDA approval in the frontline setting. But the current study that was presented at the ASCO annual meeting is a kind of a postdoc analysis of five years. The endpoint for the study with central review stopped at three years, and this is actually a follow up beyond that last readout. Interestingly, in this , when they looked at the median PFS at five years, the lorlatinib arm did not reach a median PFS even at five years and the hazard ratio is 0.19, which is kind of phenomenal in some ways. At 5 years, the majority of the patients were still on the drug. So that's quite incredible. And the benefit was more profound in patients with brain mets with a hazard ratio of 0.08. And again, speaking to the importance of brain penetrant, small molecule inhibitors, and target therapy, the safety profile, there were no additional safety signals noted in the study. We kind of know about the side effects of lorlatinib already from previous studies readouts. No unusual long-term toxicities. I should note though, about 40% of patients did have CNS, AEs grade 1, 2 CNS toxicities on the lorlatinib arm. And the other interesting thing that was also reported in the trial was dose reduction of lorlatinib did not have an impact on the PFS, which is interesting in my opinion. They also did some subgroup analysis, biomarker testing, biomarker populations. Patients who had P53 cooperation did much better with lorlatinib versus crizotinib. So overall, the other thing that they also had shown on the trial was the resistance mechanisms that were seen with lorlatinib were very different than what we are used to seeing with the earlier generation ALK inhibitors. The majority of the patients who develop resistance have bypass mechanisms and alterations in MAP kinase pathway PI3K/MTOR/PTEN pathway, suggesting that lorlatinib is a very potent ALK inhibitor and on target ALK mutations don’t happen as frequently as we see with the earlier generation ALK inhibitors. So I think this really begs the question, should we offer lorlatinib to all our patients with metastatic ALK-positive tumors? I think looking at the long-term data, it's quite tempting to say ‘yes’, but I think at the same time we have to take into consideration patient safety tolerability. And again, the competitor arm here is crizotinib. So lorlatinib suddenly seems to be, again, cross trial comparisons, but I think the long-term outcomes here are really phenomenal. But at the same time, I think we’ve got to kind of think about patient because these patients are on these drugs for years, they have to live with all the toxicities. And I think the patient preferences and safety profile matters in terms of what drug we recommend to patients. Dr. Nate Pennell: I completely agree with you. I think the right answer, is that this has to be an individual discussion with patients. The results are incredibly exciting. I mean, the two-year progression free survival was 70%, and the five-year, three years later is still 60%. Only 10% of people are failing over the subsequent three years. And the line is pretty flat. And as you said, even with brain metastases, the median survival is in reach. It's really extraordinary. Moreover, while we do talk about the significant toxicities of lorlatinib, I thought it was really interesting that only 5% of people were supposedly discontinued the drug because of treatment related AEs, which meant that with dose reduction and management, it seems as though most patients were able to continue on the drug, even though they, as you mentioned, were taking it for several years. That being said, all of us who've had experience with the second-generation drugs like alectinib and brigatinib, compared to the third-generation drug lorlatinib, can speak to the challenges of some of the unique toxicities...
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ESOPEC and Other Key GI Studies at ASCO24
06/20/2024
ESOPEC and Other Key GI Studies at ASCO24
Dr. Shaalan Beg highlights practice-changing studies in GI cancers featured at the 2024 ASCO Annual Meeting, including the ESOPEC trial in esophageal adenocarcinoma and durable responses to PD-1 blockade alone in mismatch repair-deficient locally advanced rectal cancer. TRANSCRIPT Geraldine Carroll: Welcome to the ASCO Daily News Podcast. I'm Geraldine Carroll, a reporter for the ASCO Daily News. My guest today is Dr. Shaalan Beg, an adjunct associate professor at UT Southwestern Simmons Comprehensive Cancer Center. Dr. Beg will be discussing practice- changing abstracts and other key advances in GI oncology that were presented at the 2024 ASCO Annual Meeting. His full disclosures are available in the transcript of this episode. Dr. Beg, thanks for being on the podcast today. Dr. Shaalan Beg: Thank you for having me. Geraldine Carroll: Let's begin with LBA1, the trial. This was featured in the Plenary Session, and this study compared two treatment strategies for locally advanced esophageal adenocarcinoma that could be treated with surgery. The strategies include the CROSS protocol, which consisted of chemoradiotherapy before surgery, and the FLOT protocol of chemotherapy before and after surgery. Can you tell us about this practice-changing , Dr. Beg? Dr. Shaalan Beg: Yes. According to this , perioperative chemotherapy with FLOT was better than neoadjuvant therapy with chemoradiation and carbo-taxol for people with adenocarcinoma of the esophagus. There were 438 patients enrolled on this phase 3 study. R0 resection rates were fairly similar across both groups. The PCR rates were a little higher on the FLOT group. But when you look at the median overall survival difference, 66 months in the FLOT group versus 37 months in the CROSS group, 3-year survival was 57% versus 50% favoring FLOT therapy as well. So a couple of caveats on this clinical trial, because the first thing to note is that the standard treatment for this disease has evolved because we now don't only give CROSS chemoradiation, we also give immunotherapy after the completion of chemoradiation for this group of patients. And in this , since it predated that standard of care, patients did not receive immunotherapy. But having said that, the take home for me here is that chemotherapy is better than chemoradiation for this group of patients, recognizing the fact that 1) they only enrolled adenocarcinoma patients, and 2) patients with high T stage were not included. So the folks with high T stage would be those who we would expect would benefit from the radiation aspect. So my take home here is that more chemotherapy is better in the perioperative space. Radiation should be considered for individuals who need more local control. But in general, I think we're going to see us moving more towards chemotherapy-based regimens with FLOT for this group of patients. Geraldine Carroll: Great. So moving on to rectal cancer, in , investigators reported durable, complete responses to PD-1 blockade alone in mismatch repair deficient locally advanced rectal cancer. Can you tell us more about the promising durable responses that occurred in this trial? Dr. Shaalan Beg: On first glance, seeing that immunotherapy has good activity in patients with mismatched repair deficient rectal cancer isn't really headline breaking news anymore. We've known about this activity for this group of patients for many years. Earlier at ASCO, the investigators presented early results of this compound for people receiving six months of dostarlimab therapy for people with mismatched repair deficient, locally advanced rectal cancer, and showed that they had a very high complete response rate. At that time, it generated a lot of interest and there was a lot of curiosity on whether these outcomes will be sustained. We don't know other characteristics of their biologic status and whether this was some sort of reflection of the patients who are selected or not. So here in this at ASCO 2024, they did come back to present follow-up data for people with mismatch repair deficient colorectal cancer, having received 6 months of dostarlimab. Forty-seven patients had been enrolled, and the 41 patients who had achieved a clinical complete response continued to have disease control with no distant metastases. So that's very compelling information. There were no additional serious adverse events greater than grade 2 that they saw, and they did follow circulating tumor DNA, and those did normalize even before they had their colonoscopy to examine their tumors. So, again, we're continuing to see very encouraging data of immunotherapy, and the response rate with dostarlimab seems to be very interesting for this disease, and it will be interesting to see how this pans out in larger studies and how this translates into the use of dostarlimab across other diseases where other checkpoint inhibitors are currently being used. Geraldine Carroll: Absolutely. So, moving on to . The trial looked at surgery versus thermal ablation for small cell colorectal liver metastases. This was an international, multicenter, phase 3, randomized, controlled trial. How will this study change clinical practice? Dr. Shaalan Beg: Kudos to the investigators here. They looked to understand the difference in outcome in treating people with colorectal cancer with liver only metastases. These clinical trials are extremely difficult to design. They're very difficult to enroll on because of the multidisciplinary aspect of the interventions and patient and provider biases as well. So on this clinical , the investigators enrolled people with resectable colorectal cancer, liver metastases so they did not have any metastases outside the liver. Patients were required to have 10 or less known metastases that were less than 3 cm in size. There were other allowances for larger tumors as well. And after an expert panel review, patients were randomized to either resection or ablation. It was up to the physicians whether they performed these laparoscopically or openly or percutaneously, depending on the biology of the patient and the anatomical presentation. There was a predefined stopping rule at the half-time for this clinical trial, which showed a benefit in the experimental arm of ablation compared to standard of care. The overall survival was not compromised. Progression-free survival was not compromised with local therapy. But there were differences in morbidity and mortality, as we would expect, one being a surgical procedure and the other being ablation, where, according to this study, of the 140 or so patients who received either treatment, 2.1% of people who underwent resection died within 90 days of surgery. The AE rate was 56% in the resection sample compared to 19% in ablation, and the 90-day mortality for ablation was 0.7%. So less morbidity, improved mortality, reduced adverse events with ablation versus surgical resection without compromising local control and overall survival. And I think for practice here in the United States, this does provide very interesting data for us to take back to the clinic for lesions that are relatively small and could generally be addressed by both surgery and ablation. Historically, there are various non biologic factors that could go into deciding whether someone should have surgery or ablation, and it could be based on who the physician is, who's seeing the patient, what the practice patterns in a specific organization are, and where their expertise lie. But here we're seeing that ablation for the small lesions is a very effective tool with very good local control rates, and again, in this selected group of patients with liver only metastases. And I think it is going to make tumor board discussions very interesting with data backing ablation for these lesions. Geraldine Carroll: Well, let's move onto the study. This study created some buzz in the colorectal cancer space. That's Abstract . Can you tell us about the final results of this phase 2 study of tucatinib and trastuzumab in HER2-positive metastatic CRC? What are your thoughts on this treatment option, which seems to be well tolerated? Dr. Shaalan Beg: So, HER2 overexpression or amplification occurs in about 3 to 5% of patients with metastatic colorectal cancer and up to 10% of people who have a RAS/RAF wild type disease. On the previous episodes of the podcast we have covered precision targeted therapy in colorectal cancer, focusing on c-MET, focusing on BRAF, and here we have updated results targeting HER2 for colorectal cancer. And the results of the study have been out for a while. This is a phase 2 study looking at combining tucatinib which is a highly selective HER2 directed TKI with trastuzumab, the monoclonal antibody for HER2 targeting. And what they found on this study is the confirmed overall response rate was 38%. Duration of response was 12 months, overall survival was 24 months and these are the results that have been already released and now we have an additional 16 months of follow up and these results continue to hold on. PFS and overall survival gains were held, which makes it a very interesting option for people with colorectal cancer. You mentioned the tolerability aspect and side effects. I think it's important to know the spectrum of side effects for this disease may be a little different than other TKIs. There's hypertension, but there's also the risk of diarrhea, back pain and pyrexia, with the most common grade 3 treatment related adverse event was an increase in AST level seen in 10% of people of grade 3 and above. So where does that really leave us? There is a confirmatory randomized first-line of tucatinib and trastuzumab in the first line setting, which is currently ongoing. So we'll stay tuned to see where that leads us. And with the HER2 space right now for colorectal cancer with the development of antibody drug conjugates, we may have more than one option for this group of patients once those trials read out. Geraldine Carroll: Excellent. Well, moving on to , that's the trial. This trial reported first results looking at nivolumab plus ipilimumab versus sorafenib or lenvatinib as first-line treatment for advanced hepatocellular carcinoma. Can you tell us about this trial? Will there be a potential new standard of care in advanced HCC? Dr. Shaalan Beg: When we think about patients with advanced HCC, the only treatment option that they had for about a decade and a half were just oral track tyrosine kinase inhibitors that had modest to moderate clinical activity. Since then, we've seen that combination therapy is better than TKI therapy, and the combination therapy has taken two different forms. One is a combination of checkpoint inhibitor and antiangiogenic therapy, such as in the combination of atezolizumab and bevacizumab. The other is a combination of dual checkpoint inhibitor therapy. Here we are talking about the results of nivolumab and ipilimumab. Previously, we've talked about the combination of durva and tremi for the treatment of patients with HCC. So in this , nivo was given for the first 4 cycles, nivo and ipi were given together, nivo 1 mg per kg, and IPI 3 mgs per kg every 3 weeks for 4 cycles. And then the CTLA-4 inhibitor ipilimumab was stopped. And this was followed by monotherapy nivolumab every 4 weeks until disease progression or up to 2 years. And it was compared to dealers' choice, lenvatinib or sorafenib. The median overall survival of nivo-ipi was 23 months versus 20 months with lenvatinib-sorafenib. The 24-month overall survival was 49% with ipi-nivo versus 39%. And the overall response rate with nivo-ipi was 36% compared to 13%. So again, significantly improved clinical activity. And when we talk about immunotherapy combinations, the question that comes to mind is how well is this tolerated? There's a lot of work and iteration that took place in figuring out what the right combination strategy of ipi and nivo should be, because some of the earlier studies did demonstrate fairly high adverse events in this group of patients. So on this , we saw that grade 3 or 4 treatment related adverse events were seen in 41% of people who received nivo-ipi and 42% if they received lenvatinib or sorafenib. So, certainly a high proportion of treatment related adverse events, but probably also reflective of the disease population, which is being tested, because those numbers were fairly similar in the control arm as well. So we've known that nivo-ipi is active in HCC. There is an approval in the second-line space, so it remains to be seen if this data helps propel nivo-ipi to the first-line space so we end up with another combination regimen for patients with advanced hepatocellular carcinoma. Geraldine Carroll: Excellent. Well, before we wrap up the podcast, I'd like to ask you about LBA3511. In this , investigators looked at total neoadjuvant treatment with long course radiotherapy versus concurrent chemoradiotherapy in local advanced rectal cancer with high risk factors. So this was a multicenter, randomized, open label, phase 3 . What are your key takeaways here? Dr. Shaalan Beg: Key takeaway here is that total neoadjuvant therapy was better than the conventional chemoradiation followed by chemo. So this clinical trial enrolled people with T4a/b resectable disease with clinical N2 stage, and they were randomized, as you mentioned, to receiving chemoradiation with radiation capecitabine followed by surgery, and then CAPOX or capecitabine versus chemo, short-course radiation, and additional chemotherapy followed by surgery. And when we compare both arms, the total neoadjuvant therapy led to improved disease-free survival, improved PCR rates compared to standard concurrent neoadjuvant chemo radiotherapy in this group of patients. The two arms were fairly well-balanced. The number of T4 lesions was a little higher in the chemoradiation group. There were 49% in the chemo radiation group versus 46% had clinically T4 disease, but the nodal status was fairly similar. We should keep in mind that the other baseline characteristics were fairly well balanced. And when we look at the outcomes, the disease-free survival probability at 36 months was 76% in the total neoadjuvant group compared to 67% with chemoradiation. And the metastasis free survival in total neoadjuvant therapy was 81% versus 73%. So a fairly compelling difference between the two arms, which did translate into an overall survival of 89% versus 88% in the two groups. So definitely higher disease-free survival and metastasis free survival, no difference on the overall survival with these groups. And it talks about the importance of intensifying chemotherapy upfront in this group of patients who can have a fairly high burden of disease and may struggle with receiving chemotherapy postoperatively. Geraldine Carroll: Excellent. Well, thank you, Dr. Beg, for sharing your fantastic insights with us on these key studies from the 2024 ASCO Annual Meeting. It's certainly a very exciting time in GI oncology. Dr. Shaalan Beg: Absolutely. Thank you for bringing these studies out, because I think a lot of these are practice-changing and can start impacting the clinical care that we're giving our patients right now. Geraldine Carroll: Thank you to our listeners for joining us today. You'll find links to the abstracts discussed today in the transcript of this episode. Finally, if you value the insights that you hear on the podcast, please take a moment to rate, review, and subscribe wherever you get your podcasts. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. Find out more about today’s speakers: Follow ASCO on social media: Disclosures: Dr. Shaalan Beg: Consulting or Advisory Role: Ispen, Cancer Commons, Foundation Medicine, Genmab/Seagen Speakers’ Bureau: Sirtex Research Funding (An Immediate Family Member): ImmuneSensor Therapeutics Research Funding (Institution): Bristol-Myers Squibb, Tolero Pharmaceuticals, Delfi Diagnostics, Merck, Merck Serono, AstraZeneca/MedImmune
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Immunotherapy at ASCO24: NADINA and Other Key Studies
06/19/2024
Immunotherapy at ASCO24: NADINA and Other Key Studies
Dr. Diwakar Davar and Dr. Jason Luke discuss advances in the neoadjuvant immunotherapy space that were presented at the 2024 ASCO Annual Meeting, including promising outcomes in high-risk melanoma from the NADINA trial, as well as other new treatment options for patients with advanced cancers. TRANSCRIPT Dr. Diwakar Davar: Hello and welcome to the ASCO Daily News Podcast. I'm your guest host, Dr. Diwakar Davar, and I am an associate professor of medicine and the clinical director of the Melanoma Skin Cancer Program at the University of Pittsburgh's Hillman Cancer Center. I am delighted to have my colleague and friend Dr. Jason Luke on the podcast today to discuss key late-breaking abstracts and advances in immunotherapy that were presented at the 2024 ASCO Annual Meeting. Dr. Luke is an associate professor of medicine, the associate director of clinical research, and the director of the Cancer Immunotherapeutic Center at the University of Pittsburgh Hillman Cancer Center. You will find our full disclosures in the transcript of this episode. Jason, it's always a pleasure to hear your insights on the key trials in these spaces and to have you back as a guest on this podcast that highlights some of the work, especially advances, that were just presented. Dr. Jason Luke: Well, thanks very much for the invitation. I always love joining the podcast. Dr. Diwakar Davar: We'll start very quickly by talking about some advances and really interesting things that happened both in the context of melanoma but also in immunotherapy in general. And we'll start with what I think was certainly one highlight for me, which was LBA2, the late-breaking abstract on the trial. It was featured in the Plenary Session, and in this abstract, Dr. Christian Blank and colleagues reported on the results of this phase 3 trial of neoadjuvant ipi-nivo. This is the flipped dose of ipi1/nivo3 versus adjuvant nivolumab in PD-1 naive, macroscopic, resectable, high-risk stage 3 melanoma. By way of background, neoadjuvant immunotherapy for those listening is an area of increasing interest for drug developers and development for both approved and novel agents. Neoadjuvant immunotherapy has been studied with multiple approved agents, including PD-1 monotherapy, PD-1 LAG-3, PD-1 CTLA-4, T-VEC, as well as investigational agents and multiple randomized and non-randomized studies. The benchmark pathologic response rates with these agents range from 17% PCR with PD-1 monotherapy, 45% to 55% PCR with PD-1 CTLA-4 combination therapy, and slightly higher 57% PCR with PD-1 LAG-3 has recently reported by Dr. Rodabe Amaria from MD Anderson. However, as we embark on phase 3 comparisons for various neoadjuvant compared to adjuvant immunotherapy trials and combinations, we're increasingly moving towards event-free survival as the primary endpoint for neoadjuvant versus adjuvant studies. And this was most recently studied in the context of , a study that was led by Dr. Sapna Patel. So, Jason, before we start on , can you briefly summarize the trial and the event-free survival statistic reported by Dr. Patel and her colleagues? Dr. Jason Luke: Well, absolutely. And these data were reported at ESMO about two years ago and then in the New England Journal last year. The study answered a very simple question: What would happen if you took three of the doses of standard adjuvant therapy with pembrolizumab and moved them prior to surgery? And on a high level, the is as simple as that. And many of us were somewhat skeptical of this trial design because we thought that just moving the doses earlier may not actually have a major impact. In the study, you alluded to the event-free survival statistic, and that alludes to what was considered an event. And so, without reading all of it, there were several different aspects that were included in terms of time, based on the date of randomization until the first of a series of events, such as disease progression, toxicity from treatment, if the patient was unable to go to surgery or had surgical complications, or if they had delay in starting the adjuvant therapy due to toxicity, and obviously, recurrence of melanoma or death from any cause. In that context, merely moving the 3 doses of pembrolizumab to the neoadjuvant setting saw an improvement in this two-year event free survival to 72% for the neoadjuvant therapy compared to 49% for the adjuvant therapy. That was quite an outstanding change. And again, noting the power of neoadjuvant treatment, really dictating the impact of anti PD-1, again, just with 3 doses moving from adjuvant into the neoadjuvant setting, and I think all of us were somewhat surprised to see that magnitude of a benefit. But it set up the current study very well, where we now look at combination therapy. Dr. Diwakar Davar: So let's move on to the phase 3 trial. Do you want to perhaps discuss the study design, particularly focusing on the EFS primary endpoint and maybe also touching on the different schedules? So, was a neoadjuvant study of 3 cycles of pembrolizumab and how did that compare and contrast to the neoadjuvant combination that was studied in ? Dr. Jason Luke: Well, as you alluded to, investigated the regimen of nivolumab plus ipilimumab and compared that against adjuvant therapy with nivolumab alone. So, in the study, as you alluded, the dose and schedule of the two drugs used was nivolumab at 3 milligrams per kilogram, and ipilimumab with 1 milligram per kilogram. That was based on a series of signal finding and safety studies that had been previously done by the same group of authors identifying that as the optimal treatment regimen. And it's worth noting that's slightly different than the labeled indication that's generally used for those same drugs for metastatic melanoma, albeit that the NCCN also endorses this schedule. So, in the trial, 423 patients were randomized, 1:1 to receive either neoadjuvant therapy with those 2 doses of nivolumab plus ipilimumab as compared with standard adjuvant therapy with nivolumab following surgery. Now, one interesting tweak was that there was an adaptive nature to the study, meaning that patients had a fiducial placed at the index lymph node, and after the neoadjuvant therapy in that arm, that lymph node was removed. And if the patient had a major pathological response, they did not go on to receive the adjuvant portion of the treatment. So it was adaptive because those patients who did very well to the neoadjuvant did not require the adjuvant portion. And in those patients who did not achieve a major pathological response, they could go on to have the adjuvant therapy. And that also included the BRAF therapy for those whose tumors were BRAF mutants. It's also worth pointing out that the definition of event free survival was slightly different than in the study that was alluded to just a second ago. And here, EFS was defined from the date of randomization until progression due to melanoma or due to treatment. So that's slightly different than the definition in the S1801 trial. So, a somewhat complicated study, but I really applaud the authors because I think this study does mirror what we would likely be doing in actual clinical practice. Dr. Diwakar Davar: So, just to briefly summarize the efficacy, and then to get your comments on this, the path response, the PCR rate was 47%. The major pathologic response rate, which is the proportion of patients with between 0% to 1/10% of residual viable tumors, was about 12%. And for a major pathologic response rate of 0% to 10% of 59%. And then the rest of the patients had either pathologic partial response, which was 10% to 50%, or pathologic non response or 50% or greater residual viable tumor, all assessed using central pathology grades. The one year RFS was 95% in the FDR patient population versus 76% in the pathologic partial response patient population, 57% in the pathologic non response patient population. So how do you view these results? Can you context the FDR rates and the EFS rates from NADINA relative to nivo-rela and also potentially ? Dr. Jason Luke: Well, I think these are very exciting results. I think that for those of us that have been following the field closely, they're actually not especially surprising because they mirror several studies that have come before them. When we put them in context with other studies, we see that these rates of major pathological response are consistent with what we've seen in phase 2 studies. They're relatively similar. Or I should say that the results from nivolumab and relatlimab, which was also pursued in a phase 2 study of somewhat similar design, are somewhat similar to this. So, combination immunotherapy does look to deliver a higher major pathological response than pembrolizumab alone, as was known in . Which of course, the caveat being is these are cross control comparisons that we need to be careful about. So I think all of these are active regimens, and I think adding a second agent does appear to enhance the major pathologic response rates. When we look at the event free survival, we see something similar, which is that numerically it looks to be that combination immunotherapy delivers a higher event free survival rate. And that looks to be rather meaningful given the difference in the hazard ratios that were observed between these various studies. And here in the study, we see that 0.3 hazard ratio for EFS is just extremely impressive. So the abstract then, from ourselves, out of these specific studies, what does this mean more broadly in the real world, where patients exist and the rest of the landscape for clinical trials? I think we can't take enough time to stop for a second and just think about what a revolution we've come forward in with immune checkpoint blockade and melanoma. When I started my career, now, more than 15 years ago, melanoma was the cancer that made cancer bad. And now here we say, in the highest risk of perioperative patients, we can deliver 2 doses of nivolumab and ipilimumab, and essentially half of the patients then don't need to go on, and more than half the patients don't need to go on to have a full surgery and don't need adjuvant therapy. And from what we could tell of a very, very low risk of every heavy recurrence of melanoma. Of course, there's the other half of patients where we still need to do better, but these are just fantastic results and I think highly meaningful for patients. In the context of ongoing clinical trials, another abstract that was presented during the meeting was the update to the individualized neoantigen therapy, or V940 with pembrolizumab or against pembrolizumab alone. That's the study. In that study, they presented updated data at two and a half years for relapse free survival, noting a 75% rate without relapse. So those results are also highly intriguing. And these are in a similar population of very high risk patients. And so I think most of us believe that neoadjuvant therapy with this study in is now confirmed as the priority approach for patients who present with high-risk stage 3 disease. So that would be bulky disease picked up on a scan or palpable in a clinic. I think essentially all of us now believe patients should get preoperative immunotherapy. We can debate which approach to take, and it may vary by an individual patient's ability to tolerate toxicity, because, of course, multi agent immunotherapy does have increased toxicity relative to anti PD-1 alone. But we'll have to wait now for the full phase 3 results from the V940 individualized neoantigen therapy. And if those come forward, that will be an extremely attractive approach to think about for patients who did not achieve a major pathological response to neoadjuvant therapy, as well as of course to the other populations of patients with melanoma where we otherwise currently give adjuvant therapy stage 2B all the way through stage 4 resected. It’s an amazing time to think about perioperative therapy in melanoma. Dr. Diwakar Davar: So this is clearly outstanding data, outstanding news. Congratulations to the investigators for really doing what is an investigative initiated trial conducted across multiple continents with a huge sample size. So this clearly appears to be, at this point in time at least, a de facto standard. But is this going to be FDA-approved, guideline-approved, or is it possible in your mind? Dr. Jason Luke: Well, that's an interesting question. This was not designed with the intent to necessarily try to register this treatment regimen with the FDA. One would have to take a step back and say, with how powerful these data appear, it sort of seemed like it would be too bad if that doesn't happen. But all the same, I think the community and those of us who participate in guideline recommendations are fully supportive of this. So, I think we will see this move into compendium listings that support insurance approval, I think, very, very quickly. So, whether or not this actually becomes formally FDA approved or is in the guidelines, I think this should become the standard approach that is considered for patients, again presenting with high-risk stage 3 disease. Dr. Diwakar Davar: Fantastic. So now we're going to go in and talk about a slightly different drug, but also from the melanoma context, and that is the safety and efficacy of RP1 with nivolumab in the context of patients with melanoma who are PD-1 failures. So, this is . And in this abstract, our academic colleagues essentially talked about these data, and we'll start by describing what RP1 is. RP1 essentially is a HSV-1 based oncolytic immunotherapy. And RP1 expresses GM-CSF as well as a fusogenic protein, GALV-GP-R-. And in this , Dr. Michael Wong from MD Anderson and colleagues are reporting the results of , which is a phase I trial of intratumoral RP1 co-administered with systemic nivolumab in patients with advanced metastatic treatment refractory cutaneous melanoma. And the data presented in this abstract represents data from a registration directed, abbreviated as RD, registration directed cohort of RP1 plus nivolumab in PD-1 refractory melanoma. So, let's start with the description of the cohort. Dr. Jason Luke: Right. So, in this , there were a total of 156 patients who were presented, and that included an initial safety and dose finding group of 16, as well as the RD cohort, as you noted, of 140 patients. And it's important to point out that this was a cohort that was selected for a very strict definition of progression on anti PD-1, or a combination immunotherapy as their immediately prior treatment. So, all of the patients in the cohort had exposure to anti PD-1, and 46% of them had anti PD-1 plus anti CTLA4, nivolumab and ipilimumab as their immediately prior therapy. This was also a group of relatively high-risk patients when one considers stage. So, within the stage 4 population, the entry here included 51% who had stage M1B, C, and D melanoma. And that is worth pointing out because this is an injectable therapy. So, trials like this in the past have tended to be biased towards earlier stage, unresectable or metastatic melanoma, meaning stage 3B, 3C, 3D and then stage 4m1a. Again, to emphasize the point here, these were pretreated patients who had a strict definition of anti PD-1 resistance, and over half of them, in fact, had high-risk visceral metastatic disease. In that context, it's very interesting to observe that the overall response rate was described in the total population, as 31%, and that included 12% who achieved complete response. And so, again, to make sure it's clear, we're talking about a treatment where the oncolytic virus is injected into one or multiple sites of recurrent disease, and then the patients administer nivolumab as per standard. And so, I think these data are quite intriguing. Again, such a high- risk population and their maturity now, with a follow-up of over a year, I think, makes this look to be a very interesting treatment option. Dr. Diwakar Davar: I guess on that topic of mature follow-up, it probably would be important for us to inform our audience that the top line data for the primary analysis was actually just released, I think, earlier today, and wherein the central confirmed objective response rate was 34% by modified RECIST and 33% by RECIST, clearly indicating that these responses, as you noted, very treatment refractory patient population, these responses were clearly very durable. So, you mentioned that there were responses seen in uninjected visceral lesions, responses seen in both PD-1 and PD-1 CTLA-4 refractory patients. Can you talk a little bit about the response rate in these high-risk subgroups, the uninjected visceral lesions, the patients who had both combination checkpoint and epidural refractory response rate by primary PD-1 resistance. Dr. Jason Luke: Sure. You know, I think, again, to emphasize this point in the , we saw that there were responses in the non-injected lesions, and I think it's really important to emphasize that. Some have referred to this as a putative abscopal like effect, similar to what is described in radiation. But it implies that local treatment with the oncolytic virus is triggering a systemic immune response. In the higher risk patient population, we'll note that whereas the overall response rate in PD-1 refractory patients was 34%, in the combination of PD-1 and CTLA-4 refractory patients, the response rate was 26%. So, [this is] still very good. And when we looked at that split by stage, as I alluded to before, in the population of patients that had, what you might call earlier unresectable diseases, so 3B through 4A, the response rate was 38%, and in the stage 4 M1b through M1d, it was 25%. So slightly lower, but still very good. And that would be as expected, because, of course, the patients with visceral metastatic disease have more advanced disease, but those response rates look quite good. Again, looking at the combination refractory population as well as the more high-risk disease. Dr. Diwakar Davar: So, clearly, these are very promising data and exciting times for multiple investigators in the field and the company, Replimune, as well. So, what are the next steps? I believe that a registration trial is planned, essentially, looking at this with the goal of trying to get this combination registered. Can you tell us a little bit about IGNYTE-3, the trial design, the control arm, and what you foresee this trial doing over the next couple of years? Dr. Jason Luke: So, as this agent has been maturing, it's worth pointing out that the company that makes this molecule, called RP1, but I guess now we'll have to get used to this name vusolimogene oderparepvec as the actual scientific term, they have been having ongoing discussions with the FDA, and there is the potential that this agent could come forward on an accelerated path prior to the results being released from a phase 3 trial. That being said, the phase 3 confirmatory study, which is called the IGNYTE-3 study, is in the process of being launched now. And that's a study investigating this molecule in combination with nivolumab, as was alluded to earlier, and a randomized phase 3 design, where that combination is compared with a physician's choice, essentially a chemotherapy-based option. In that study, it will be 400 patients with stage 3B through stage 4; patients will have progressed on anti PD-1, either as a combination or in sequence, and then come on the study to be randomized to either vusolimogene oderparepvec plus nivolumab versus that physician's choice. And the physician's choice includes chemotherapy agents, but also nivolumab plus relatlimab as another option, or an anti PD-1 monotherapy,...
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Day 4: Top Takeaways From ASCO24
06/03/2024
Day 4: Top Takeaways From ASCO24
Dr. John Sweetenham shares highlights from Day 4 of the 2024 ASCO Annual Meeting, including exciting new data from the IMROZ trial in multiple myeloma, adjuvant therapy for triple-negative breast cancer in A-BRAVE, and the front-line treatment of advanced renal cell carcinoma in JAVELIN Renal-101. TRANSCRIPT Dr. John Sweetenham: I'm Dr. John Sweetenham, the host of the ASCO Daily News Podcast, with my top takeaways on selected abstracts from Day 4 of the 2024 ASCO Annual Meeting. Today's selection features 3 randomized prospective trials in the first-line treatment of multiple myeloma, adjuvant therapy for triple negative breast cancer, and the frontline treatment of advanced renal cell carcinoma, all of which provide important new data. My full disclosures are available in the transcript of this episode. The first of today's abstracts is number . This abstract, presented by Dr. Thierry Facon from the Department of Hematology at the University of Lille in France, describes the results of the study. This was a multicenter phase 3 study comparing a current standard first-line regimen for transplant ineligible patients with myeloma VRd with the same combination plus an additional agent, isatuximab. The combination of bortezomib, lenalidomide and dexamethasone, known as VRd, is currently a standard first-line regimen for patients with multiple myeloma, both transplant eligible and ineligible. Previous phase 3 studies have shown that the addition of an anti-CD38 antibody to triplet regimens improves outcomes in newly diagnosed patients. Based on early phase clinical trial data showing promising response rates with isatuximab, the study was conducted to compare isatuximab VRd with VRd alone in patients who were either ineligible for transplant or had no immediate indication for transplant. was a global study conducted in 21 countries that involved 446 patients randomly assigned 3:2 to induction therapy with Isa-VRd followed by continuous Isa-Rd or induction therapy with VRd followed by Rd alone. The rate of complete response or better was approximately 75% with Isa-VRd compared with 64% with VRd alone. Very good partial response or better was achieved in 89% of patients with Isa-VRd, compared with around 83% of those with VRd alone. With a median follow-up at 5 years, Isa-VRd followed by Isa-Rd had reduced the risk of progression or death by 40.4% compared with VRd alone. The 60-month progression-free survival rate was 63% for Isa-VRd compared with around 45% with VRd alone, and the progression-free survival benefit was maintained in most of the analyzed subgroups. Minimal residual disease negativity was also measured in this study in both the intent to treat population and those patients who achieved a complete response. For example, in the intent to treat population, the MRD negative rate was 58% with Isa-VRd compared with around 43% with VRd alone. There were also higher rates of sustained MRD negativity for 12 months or longer among patients assigned to Isa-VRd compared with VRd alone, reflecting deeper responses in the Isa-VRd arm. Although overall survival data is still immature, data from an interim analysis showed a favorable trend in the Isa-VRd arm with 22.4% risk reduction compared with VRd alone. There was little additional toxicity from the inclusion of isatuximab with the VRd regimen and the quality-of-life data were comparable and stable in both arms of the study. The investigators concluded that although overall survival data are immature, there is a trend in favor of Isa-VRd and this, combined with the favorable response, toxicity and progression-free survival data, establish isatuximab VRd as a potential new standard of care for newly diagnosed multiple myeloma patients not eligible for transplant. There was some discussion regarding the potential use of this regimen in patients over 80 years of age since the upper age limit was capped in IMROZ at 80 years. Although there are concerns for tolerance of the 4-drug regimen in the older patient group, it seems likely that this will be adopted, especially for those with good performance status and without major comorbidities. Next up is . This abstract reports results of the trial. This trial, presented by Dr. Pier Franco Conte from the University of Padova, Italy, was a phase 3 randomized trial to assess the efficacy of the immune checkpoint inhibitor avelumab in 2 groups of patients: those with early triple negative breast cancer, with residual disease after neoadjuvant chemotherapy; and those at high risk after primary surgery and adjuvant chemotherapy. As Dr. Conte explained in the introduction to this , there is a fairly compelling rationale for the use of checkpoint inhibitors in triple negative breast cancer. The disease has been shown to be more immunogenic than the other breast cancer types with immune biomarkers such as TILs and PDL-1 expression associated with better prognosis, added to which, data in metastatic breast cancer show a correlation between PDL-1 expression and checkpoint inhibitor response. In the study, 477 high risk patients who had completed local, regional, and systemic treatment with curative intent were stratified according to adjuvant or post neoadjuvant status and randomized 1:1 to receive avelumab at 2-week intervals for 52 weeks or to observation only. Results of the study showed a non-statistically significant improvement in three-year disease-free survival in the overall intent to treat population at 5.1% and in the post neoadjuvant patients at 6.2%. Overall survival was a secondary endpoint in this trial. The results show a significant improvement in overall survival of 8.1% in the intent-to-treat population and a very similar improvement in the post-neoadjuvant patients. The authors reported good tolerance of avelumab, although in total almost 30% discontinued treatment at some point. In their conclusion, the investigators state that the 34% reduction in the risk of death suggests a potential role for avelumab in early triple negative breast cancer patients at high risk after primary surgery or with invasive disease after neoadjuvant chemotherapy. Correlative studies are planned on tumor plasma and feces in this . These are interesting and somewhat tantalizing results, suggesting a real effect from avelumab. Although confounded somewhat by the sample size, it will be important to see how these results mature with further follow-up. Today's third selected abstract is number reporting the final analysis of the JAVELIN Renal 101 phase 3 trial in patients with advanced renal cell carcinoma. This compared the combination of axitinib plus avelumab with sunitinib in this patient group. The trial included 886 patients, of whom around 61% of those in the combination group and around 65% of those in the monotherapy group were PDL-1 positive. In the initial analysis from the JAVELIN Renal 101 study, after at least 6 months of follow-up, avelumab and axitinib significantly improved progression-free survival over sunitinib in patients with PDL-1 positive tumors and in the overall population with advanced renal cell carcinoma. In the fall cohort, the median progression-free survival with the combination was 13.8 months compared with only 8.4 months with sunitinib, and based on those results, the combination received FDA approval as a first-line treatment for patients with advanced renal cell carcinoma in May of 2019. The progression-free survival observed in the initial analysis was confirmed with a new long-term analysis in the overall population. Median progression-free survival with avelumab and axitinib was 13.9 months compared with only 8.5 months with sunitinib and the median duration of response with the combination was 19.4 months versus 14.5 months with sunitinib. However, no difference in overall survival was seen. At 60 months, the overall survival in the combination group was 38.8% and 36.2% with sunitinib. In patients who were PDL-1 positive at 60 months, overall survival with a combination was 37.1% compared with 33.4% with sunitinib. Despite the sustained difference in progression-free survival seen with this combination, the discussant at this session pointed out that most oncologists are unlikely to recommend a combination which has not been shown to improve overall survival when published studies have reported on 4 combinations which do positively impact overall survival in this patient group. Despite the good tolerance of this regimen, it seems unlikely to be a preferred frontline regimen in advanced renal carcinoma moving forward. That concludes today's report. Thanks for listening and we hope you have enjoyed listening to our top takeaways from ASCO24. If you value the insights that you hear on the ASCO Daily News Podcast, please remember to rate, review and subscribe wherever you get your podcasts. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. Follow ASCO on social media: Disclosures: Dr. John Sweetenham: Consulting or Advisory Role: EMA Wellness
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Day 3: Top Takeaways From ASCO24
06/02/2024
Day 3: Top Takeaways From ASCO24
Dr. John Sweetenham shares highlights from Day 3 of the 2024 ASCO Annual Meeting, including selected studies on the treatment of cancer cachexia, surgical approaches in advanced ovarian cancer, and advanced colorectal cancer with liver metastases. TRANSCRIPT Dr. John Sweetenham: I'm Dr. John Sweetenham, the host of the ASCO Daily News Podcast, with my top takeaways on selected abstracts from Day 3 of the 2024 ASCO Annual Meeting. Today's selection features studies addressing the treatment of cancer cachexia and 2 studies of surgical approaches to the treatment of advanced ovarian cancer and of advanced colorectal cancer with liver metastases. My full disclosures are available in the transcript of this episode. Cachexia affects up to 80% of patients with advanced cancer and is thought to be directly responsible for 30% of cancer deaths, according to the National Cancer Institute. Despite these statistics, the condition remains understudied and there is no standard treatment. Current guidelines recommend dietary counseling and low-dose olanzapine or short courses of corticosteroids or progesterone analogues can be used to promote weight gain. However, the guidelines mainly point to evidence gaps. No drug therapy could be strongly endorsed to improve patient outcomes and no recommendations could be made regarding exercise. Dr. Tora Solheim from the Cancer Clinic at St. Olavs Hospital in Trondheim, Norway, today reported results from the MENAC trial in , which tested an intervention that combined treatment with nonsteroidal anti-inflammatory medication ibuprofen, home-based exercise to improve endurance and muscle strength, nutritional counseling, and supplements containing omega-3 fatty acids, which, based on previous research, may enhance muscle mass in patients with cancer cachexia. This enrolled 212 patients with stage III or IV lung or pancreatic cancer from 17 sites in 5 countries. All patients were receiving palliative chemotherapy and either had cachexia or were at high risk of developing it. Half were randomly assigned to the intervention and half to standard care. For the exercise components of the intervention, patients were encouraged to engage in aerobic activity such as walking, swimming, or even household chores at least twice a week. They were also encouraged to perform strengthening exercises such as half squats, bicep curls, and knee lifts 3 times per week. Over 6 weeks, the trial found average body weight stabilized in the intervention group compared with a loss of 1 kg in the standard care group, but there were no differences between the two groups and the secondary endpoints of muscle mass and daily step count as measured by ActiGraph. Dr. Solheim pointed out that 6 to 8 weeks may be too early to observe any anabolic effects on muscle mass or function, but that this timeframe was chosen, she said, because previous studies, including her team’s own feasibility study had encountered high dropout rates among similar patient groups after 6 to 8 weeks. Although these are interesting data, I think they also pose many questions: Is maintaining 1 kg of body weight a meaningful endpoint? Did the patients report any improvement in other symptoms? How was at-home exercise monitored for compliance? Did we know whether the patients were fulfilling adequate amounts of exercise? And there are many more questions. I think the investigators should be congratulated for demonstrating the feasibility of conducting a randomized trial in this challenging patient group, and this will hopefully provide a basis for future studies exploring new interventions. In , Dr. Jean-Marc Classe presented data from the study, a randomized trial evaluating the use of retroperitoneal lymph node dissection in patients undergoing primary surgery or interval cytoreductive surgery after neoadjuvant chemotherapy for advanced epithelial ovarian cancer. To provide some context, an earlier study, the phase 3 trial, assessed the role of RPLD in patients with advanced ovarian cancer with complete resection and normal lymph nodes after primary surgery. In this trial, RPLD provided no significant improvement in overall or progression-free survival and was associated with a significant increase in serious postoperative complications and 60-day mortality. In recent years, the use of neoadjuvant chemotherapy and interval surgery has increased significantly in the U.S. and Europe, and it was unknown whether RPLD could have a benefit among these patients. The trial was undertaken to answer this question, enrolling patients treated with either primary surgery or neoadjuvant chemotherapy and interval surgery to reflect a real-world population. The multicenter trial enrolled 379 patients with FIGO stage III-IVA epithelial ovarian cancer with no suspicious retroperitoneal lymph nodes in whom optimal surgery was achievable with primary surgery or with interval cytoreductive surgery after neoadjuvant chemotherapy with residual tumor at less than 1 cm. Patients were randomly assigned to surgery with or without retroperitoneal lymph node dissection. Patients receiving primary surgery accounted for about 26% of the no RPL arm and 21% of the RPL arm. The primary endpoint was progression free survival, and secondary endpoints included overall survival, safety, surgical outcomes, and quality of life. Although the trial initially planned to enroll 450 patients, enrollment slowed after the presentation of the results of the Lyon trial, leading to a premature closing of this trial to enrollment with 379 patients. The median age of enrolled patients was 64 - 65 years and 87% had serous or endometrioid carcinoma. Surgery was performed with no residual tumor in around 86% of the patients in the no RPL arm and 88% of patients in the RPL arm. Importantly, the median duration of surgery was 240 minutes in those with no RPL versus 300 minutes in the RPL arm, representing an additional hour for those who underwent retroperitoneal lymph node dissection. Severe morbidity within 30 days of surgery was significantly improved in the no RPL arm compared with the RPL arm as assessed by rates of transfusion or blood loss, re-intervention, and urinary injury. In an intent to treat analysis, there was no significant difference in progression-free survival in patients who did or did not receive retroperitoneal lymph node dissection. The respective median progression-free survivals were 14.8 and 18.6 months. Median overall survival was 48.9 months and 58.8 months, respectively, and on subgroup analysis, no benefit for retroperitoneal lymph node dissection was observed. Although the results of this study are slightly confounded by the failure to reach their target accrual, the data shows strong evidence that these patients can be spared the additional surgery and subsequent surgical complications without compromising progression free or overall survival. Dr. Classe and his colleagues hope to determine whether retroperitoneal lymph node dissection is useful in patients with suspicious nodes. The third selected abstract today is , which describes a remarkable prospective study of chemotherapy plus liver transplantation versus chemotherapy alone in patients with unresectable colorectal cancer liver metastases. The results of the so-called study were presented by Dr. Adam from Villejuif, France, on behalf of a study group including centers from France, Belgium, and Italy. In the introduction to the study, the presenter pointed out that liver resection is currently the optimal treatment for liver metastases from colorectal cancer and offers the potential for long-term survival and even cure. But resection is only possible in 10% to 20% of patients. And although cytoreductive chemotherapy may convert some patients to a resectable status, this is relatively rare. The current standard of care is the use of chemotherapy, which may prolong survival but is not curative. Liver transplantation has been used in this context since the 2000s with apparent improvements in outcome, but TRANSMET is the first randomized trial to assess the benefit of adding liver transplantation to chemotherapy in this patient group. The TRANSMET study evenly randomized 94 patients to either undergo chemotherapy and liver transplantation or only chemotherapy. The patients were highly selective in terms of age, performance status, resection of primary tumor, months of tumor control, previous line of therapy, and tumor markers. It's noteworthy that of the 157 patients eventually considered, 63 failed to meet the demanding eligibility criteria on the review of the trial committee. The 5-year overall survival rate in the intent to treat analysis was 57% in the chemotherapy plus liver transplant cohort and 13% in the chemotherapy-alone arm. Progression-free survival was 17.4 versus 6.4 months, respectively. 28 of the 38 transplanted patients suffered relapses, 15 of which were in the lungs. Surgical resection and/or radio ablation were used in many of these patients. The authors concluded that liver transplantation is an option which should be considered in this highly selective patient group and that the outcomes reported here are comparable to outcomes for liver transplantation and other conditions. Understandably, this is a small study in a highly selective group, and it's difficult to know where this will gain traction. With a shortage of organs for donation, prioritization of this small patient group may be challenging. That concludes today's report. Join me again tomorrow to hear more top takeaways from ASCO24. If you value the insights that you hear on the ASCO Daily News Podcast, please remember to rate, review, and subscribe wherever you get your podcasts. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. Follow ASCO on social media: Disclosures: Dr. John Sweetenham: Consulting or Advisory Role: EMA Wellness
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Day 2: Top Takeaways From ASCO24
06/01/2024
Day 2: Top Takeaways From ASCO24
Dr. John Sweetenham shares highlights from Day 2 of the 2024 ASCO Annual Meeting, including potentially practice-changing results in advanced Hodgkin lymphoma, intriguing data on the effect of metformin on active surveillance for prostate cancer, and the potential of AI to improve patient outreach and adherence to medical appointments. TRANSCRIPT Dr. John Sweetenham: I'm Dr. John Sweetenham, the host of the ASCO Daily News Podcast, with my top takeaways on selected abstracts from Day 2 of the 2024 ASCO Annual Meeting. Today's selection features potentially practice-changing results for patients with advanced stage Hodgkin lymphoma, results from a large trial testing the effects of metformin in patients on active surveillance for their prostate cancer, and early results giving insights into the benefits that artificial intelligence may bring to address disparities in cancer care. My full disclosures are available in the transcript of this episode. The first of today's abstracts is , which reports the results from a large international randomized trial in patients with advanced Hodgkin lymphoma, presented by Dr. Peter Borchmann from the German Hodgkin Study Group. Since Hodgkin lymphoma typically affects adults in their 20s and 30s, the focus of clinical trials in recent years has been on achieving high rates of disease control while at the same time reducing the potential for short-term and long-term toxicities associated with classical chemotherapy and radiation therapy regimens. Particular emphasis has been given to reducing risk for secondary malignancy and impaired reproductive function in long-term survivors. Building on the back of previous studies from this group, the escalated BEACOPP regimen was modified to reduce the overall duration of treatment and the potential for toxicity by incorporating novel agents, including brentuximab vedotin. This novel regimen, known as BrECADD, was compared with escalated BEACOPP in a randomized trial, . Patients received 4 or 6 cycles of therapy based on the response of their disease to the first 2 cycles assessed by interim PET scan. 1,482 patients were randomized, 740 to escalated BEACOPP and 742 to BrECADD, with median follow-up at 48 months. The 4-year progression-free survival was 94.3% with BrECADD, compared with 90.9% for escalated BEACOPP, with a hazard ratio of 0.66. These results are particularly noteworthy since 64% of patients on the BrECADD arm had a negative PET scan after 2 cycles of therapy and therefore received a total of just 4 cycles, reducing their risk of toxicity. On that note, lower rates of treatment related toxicity were observed with BrECADD. Specifically, hematologic toxicity and peripheral sensory neuropathy were less frequently seen. Female reproductive toxicity was lower with BrECADD, with more than 95% of women having normal FSH levels after 1 year on BrECADD, compared with 73% on escalated BEACOPP. Dr. Borchmann also noted that recovery of male reproductive function was improved with BrECADD, although details were not provided. These are impressive data, although no overall survival difference was observed. This is not surprising in view of the effective salvage therapies available to patients whose disease relapses after first-line therapy. The authors conclude that these results are unprecedented for the first-line treatment of Hodgkin lymphoma and that the BrECADD regimen should be considered as a new standard of care option. Although these results are likely to change practice in some parts of the world, particularly in Europe, it's less clear whether they will impact current treatments in the United States, where modifications to the ABVD regimen, including the addition of brentuximab vedotin and more recently nivolumab, have been the subject of recent randomized trials. That said, these data add to the increasing evidence that cure of advanced Hodgkin lymphoma is possible in most patients, and that concerns over short- and long-term toxicities of therapy for this young group of patients are being addressed using several strategies. The next abstract, reports the results of a Canadian study investigating the use of metformin to slow or prevent progression in patients with low-risk prostate cancer on active surveillance. Professor Anthony Joshua pointed out in his presentation that there are extensive epidemiologic, biologic, and clinical data suggesting that metformin may affect the progression of low-risk prostate cancer, but this has not previously been evaluated in the context of a randomized controlled trial. The MAST study – or Metformin Active Surveillance Trial – was designed to prospectively evaluate the use of metformin in patients with low-risk prostate cancer eligible for active surveillance. Patients were eligible for the trial if they had been diagnosed within the previous 12 months, had low-risk prostate cancer, defined as a Gleason score of less than 6 in less than one-third of cores involved and less than 50% of any 1 core plus having a PSA of less than 10. These patients were randomized to either active surveillance plus placebo or active surveillance plus metformin at an initial dose of 850 milligrams daily for 1 month, followed by 850 milligrams twice daily for 35 months. Evaluations including prostate biopsies were performed at baseline, then at 18 and 36 months. 405 patients were randomized 1:1 and were well matched for patient characteristics and risk factors. Pathologic and therapeutic progression were the major endpoints of the study. The overall results of the study showed that the use of metformin in this population had no effect on pathologic or treatment progression. Although not a planned analysis, there was a signal that the use of metformin may accelerate progression in certain patients, including those with a high BMI. This study shows definitively that metformin should not be used in low-risk, localized prostate cancer patients who are eligible for active surveillance. There are many unanswered questions about its use in other situations in prostate cancer and in low-risk patients who also have diabetes. The final selection for today is . In this presentation, Dr. Alyson Moadel from Montefiore Einstein Comprehensive Cancer Centre in New York City described an artificial intelligence platform which showed potential to improve patient outreach and adherence to medical appointments. In underserved communities of color, barriers to colorectal cancer screening can contribute to disparities due to late-stage diagnosis and poor outcomes. Despite active outreach by skilled patient navigators at this center, which serves an ethnically minoritized and disadvantaged population, 59% of patients either canceled or did not show for their colonoscopy appointments in 2022. While patient navigator reengagement efforts led to 21% eventually completing colonoscopy, 1,500 patients did not undergo potentially lifesaving colon cancer screening that year. The study used MyEleanor, a virtual patient navigator that engages in personalized AI conversation, to target 2,400 patients who had not attended their colonoscopy appointment in 2022 to 2023. MyEleanor called patients to discuss rescheduling, assessed barriers to uptake, offered live transfers to clinical staff to reschedule, and provided procedure preparation reminder calls. During the study, 57% of patients engaged with MyEleanor, with 58% of this group or 33% overall accepting the live transfer. The rate of completed colonoscopies for patients who did not show for their initial appointment nearly doubled from 10% to 19% after the initiation of MyEleanor. Overall patient volume increased by 36%. Nearly one-third of the patients reported at least 2 barriers to screening. Top barriers included lack of perceived need, time, medical mistrust, concerns about findings, and cost. The investigators plan to extend these studies to explore the impact of this tool on patient preparation adherence, staff burden, and revenue. As data emerge on the potential applications of AI in the cancer care ecosystem, it's exciting to see how tools such as this have the potential to improve rates of prevention and early detection and address cancer care disparities. Join me again tomorrow to hear more top takeaways from ASCO24. If you value the insights that you hear on the ASCO Daily News Podcast, please remember to rate, review, and subscribe wherever you get your podcasts. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. Follow ASCO on social media: Disclosures: Dr. John Sweetenham: Consulting or Advisory Role: EMA Wellness
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Day 1: Top Takeaways From ASCO24
05/31/2024
Day 1: Top Takeaways From ASCO24
In the first episode of a special daily series during the 2024 ASCO Annual Meeting, Dr. John Sweetenham shares highlights from Day 1, including exciting data on the CROWN trial in NSCLC, the ASC4First study in chronic myeloid leukemia, and the effects of high-deductible health plans on cancer survivorship. TRANSCRIPT Dr. John Sweetenham: I'm Dr. John Sweetenham, the host of the ASCO Daily News Podcast. I'm delighted to bring you a special series of daily episodes from the 2024 ASCO Annual Meeting and to share my top takeaways on selected abstracts. Today, I'll be reviewing exciting new data in chronic myeloid leukemia, remarkable outcomes for patients with ALK-positive non-small cell lung cancer, and a compelling study on the effects of high deductible health plans on cancer survivorship. My disclosures are available in the transcript of this episode. , the ASC4FIRST trial, is a phase 3 combination of asciminib with the current standard of care tyrosine kinase inhibitors, those being imatinib, nilotinib, dasatinib and bosutinib for the first line treatment of patients with chronic myeloid leukemia. The data from this large multinational study, conducted in 29 countries, were presented by Dr. Timothy Hughes from the Royal Adelaide Hospital in Australia. Some patients with chronic phase CML respond well to tyrosine kinase inhibitor therapy, and about one-third may eventually be able to stop therapy and will remain in remission, the so-called treatment free remission or TFR. Unfortunately, almost half of patients eventually need to change therapy due to resistance and intolerance, and most patients will need to remain on therapy for many years, possibly for life. Asciminib is the first BCR-ABL1 inhibitor to specifically target the ABL myristate pocket or STAMP and was designed to be highly potent but also highly specific, thus minimizing side effects and toxicity. In this large trial, which is the first randomized head-to-head comparison of asciminib with other tyrosine kinase inhibitors, 405 patients were randomized 1:1 to receive either asciminib at a dose of 80 milligrams daily or another investigator-selected TKI. The groups were well balanced for all patient characteristics, including ELTS risk. The primary objectives of the study were to compare the major molecular response rate at 48 weeks with an additional analysis for the patients who received imatinib as the investigator-selected TKI. With median follow-up at 16.3 months for patients receiving asciminib and 15.7 months for those receiving the other TKIs, the 48-week MMR rates were 68% for asciminib compared with 49% for the other investigators-selected TKIs. The rates of MR4 after 48 weeks, a deep molecular response which is a prerequisite to be considered for treatment free remission, were 39% for asciminib compared to 21% for the investigator-selected TKI. Tolerability and safety were excellent for asciminib, with only 5% discontinued due to toxicity compared to 10% for the other TKI arm. Frequently observed toxicities with asciminib included thrombocytopenia and neutropenia. The investigators concluded that asciminib is the only agent to show a statistically significant improvement in efficacy and toxicity in this patient group when compared with all other TKIs, and that asciminib has the potential to become the preferred standard of care for the first line treatment of CML. Follow-up on the study continues, but there is no question that these are exciting and probably practice-changing results. The next exciting study, , was presented by Dr. Benjamin Solomon from the Peter MacCallum Cancer Centre in Melbourne, Australia. This presentation was an update of the CROWN study for patients with previously untreated advanced ALK-positive non-small cell lung cancer. Lorlatinib is a third-generation brain-penetrating ALK inhibitor which was compared with crizotinib in the CROWN-3 study. This phase 3 study enrolled 296 patients randomly assigned to lorlatinib 100 milligrams once daily or crizotinib 250 milligrams twice daily. The interim results showed a 72% reduction in the risk for progression or death with lorlatinib compared with crizotinib and formed the basis for the March 2021 FDA approval of the drug for metastatic ALK positive non-small cell lung cancer. A subsequent post hoc analysis at three years showed continued progression free survival benefit with lorlatinib compared with crizotinib. Earlier today, Dr. Solomon presented a further post hoc analysis of the study at 60.2 months of median follow-up. Among the entire patient population, the median PFS was not reached with lorlatinib compared with 9.1 months with crizotinib. At 60 months, the PFS rate was 60% with lorlatinib compared with only 8% with crizotinib. The PSF benefits with lorlatinib were seen across all patient subgroups. The improved control of central nervous system metastatic disease, which was observed in the earlier reports, has been confirmed in this recent analysis. Among those patients with baseline brain metastases, the median PFS with lorlatinib was not yet reached compared with six months with crizotinib. More than half of patients with baseline brain metastases were progression free at 60 months. But the benefit of lorlatinib is certainly not confined to patients with brain metastases. Lorlatinib also significantly improved progression-free survival among patients without metastases. At 60 months, 63% of patients without baseline brain metastases assigned to lorlatinib were progression free, compared with only 10% of those assigned crizotinib. These are remarkable results. As Dr. Solomon stated in his conclusion, 60% of patients on lorlatinib are still progression free and 92% are progression free in the brain. No new safety signals were seen and the improved efficacy over crizotinib was seen across all risk groups. These results are unprecedented in patients with ALK-positive non-small cell lung cancer. Concerning data were presented today by Dr. Justin Barnes from Washington University. Dr. Barnes presented results from a retrospective study in which showed whether a patient with cancer has high-deductible health insurance can play a role in their survival. Although previous studies have shown care disparities for those with high-deductible plans, this report focuses specifically on effects on survival and concludes that cancer survivors with high-deductible health plans had a greater risk of mortality both overall and from cancer. High-deductible insurance was defined as costing between $1,200 and $1,350 annually for individual insurance, or between $2,400 and $2,700 annually for a family plan. Investigators used data from the U.S. National Center for Health Statistics National Health Interview Survey and linked them to files from the National Death Index to determine mortality rates. Included were more than 147,000 respondents aged between 18 and 84 years who did not have Medicaid. Among these individuals, 5.9% were cancer survivors. The concern for cancer survivors with these plans is that in addition to recurrence that could require costly treatments, there might be issues related to survivorship. Investigators found that overall survival was worse for those with a cancer diagnosis coupled with high-deductible health insurance, with a hazard ratio of nearly 1.5. But when the researchers reviewed data from the general population without a history of cancer, they didn't find any association between high-deductible health insurance and outcomes. According to Dr. Barnes, the leading hypothesis is that patients with cancer who have a high-deductible plan delay workup for a potential new or recurrent cancer diagnosis or postpone or avoid other care. The results also indicated that survival among certain subgroups, such as non-Hispanic white patients, patients with higher incomes, and patients with at least a college or high school education, was worse for those with a high-deductible health plan, not the groups who are typically impacted by care disparities. It is possible that these individuals are more likely to select high-deductible health plans and that having these plans might counteract what might otherwise be adequate access to care. A key take-home from this is that cancer patients and survivors, whatever their racial, ethnic, or socioeconomic status, should have access to health plans with low deductibles and should be informed of the potential risks of their long-term health and survival when covered by high-deductible plans. Join me again tomorrow to hear more top takeaways from ASCO24. If you value the insights that you hear on the ASCO Daily News Podcast, please remember to rate, review and subscribe wherever you get your podcasts. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity or therapy should not be construed as an ASCO endorsement. Follow ASCO on social media: Disclosures: Dr. John Sweetenham: Consulting or Advisory Role: EMA Wellness
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Key Abstracts in GU Cancers at ASCO24
05/25/2024
Key Abstracts in GU Cancers at ASCO24
Dr. Neeraj Agarwal and Dr. Jeanny Aragon-Ching discuss promising combination therapies and other compelling advances in genitourinary cancers in advance of the 2024 ASCO Annual Meeting. TRANSCRIPT Dr. Neeraj Agarwal: Hello and welcome to the ASCO Daily News Podcast. I'm Dr. Neeraj Agarwal, your guest host of the ASCO Daily News Podcast today. I'm the director of the Genitourinary Oncology Program and a professor of medicine at the University of Utah Huntsman Cancer Institute, and editor-in-chief of the ASCO Daily News. I'm delighted to be joined by Dr. Jeanny Aragon-Ching, a GU medical oncologist and the clinical program director of genitourinary cancers at the Inova Schar Cancer Institute in Virginia. Today, we will be discussing some key abstracts in GU oncology that will be featured at the 2024 ASCO Annual Meeting. Our full disclosures are available in the transcript of this episode. Jeanny, it’s great to have you on the podcast. Dr. Jeanny Aragon-Ching: Thank you so much, Dr. Agarwal. It's a pleasure to be here. Dr. Neeraj Agarwal: So, Jeanny, let's start with some bladder cancer abstracts. Could you tell us about the titled, “Characterization of Complete Responders to Nivolumab plus Gemcitabine Cisplatin versus Gemcitabine Cisplatin Alone in Patients with Lymph Node Only Metastatic Urothelial Carcinoma from the CheckMate 901 Trial.” Dr. Jeanny Aragon-Ching: Of course, Neeraj, I would be delighted to. First, I would like to remind our listeners that the CheckMate 901 trial was a randomized, open-label, phase 3 study, in which this particular sub-study looked at cisplatin-eligible patients with previously untreated, unresectable, or metastatic urothelial carcinoma who were assigned to receive the combination of gemcitabine and cisplatin, followed by up to 2 years of nivolumab or placebo. Based on the data presented at ESMO 2023 and subsequently published in the , which shows significantly improved progression-free survival and overall survival in patients receiving the combination of gemcitabine, cisplatin, and nivolumab, this regimen was approved in March 2024 as a first-line therapy for patients with unresectable or metastatic urothelial carcinoma. In the that will be featured at ASCO this year, Dr. Matt Galsky and colleagues present a post-hoc analysis that aims to characterize a subset of patients with complete response as well as those with lymph node-only metastatic disease. In patients receiving the experimental treatment, 21.7% achieved a complete response, while 11.8% of the patients in the control arm achieved a complete response. Among these complete responders, around 52% had lymph- node-only disease in both arms. Furthermore, when characterizing the subgroup of patients with lymph-node-only disease, those receiving the combination of gemcitabine-cisplatin plus nivolumab had a 62% reduction in the risk of progression or death and a 42% reduction in the risk of death compared to those treated with gemcitabine-cisplatin alone. The median overall survival in the experimental arm in this subgroup was around 46.3 months, while it was only 24.9 months in the control arm. The ORR in patients with lymph-node-only disease receiving gem-cis plus nivo was about 81.5% compared to 64.3% in those treated with gem-cis alone. Dr. Neeraj Agarwal: Thank you, Jeanny, for the excellent summary of this abstract. We can say that nivolumab plus gemcitabine-cisplatin induced durable disease control and clinically meaningful improvements in OS and PFS compared to gem-cis alone in patients with lymph- node-only metastasis, and deserves to be considered as one of the options for these patients. In a similar first-line metastatic urothelial carcinoma setting, , also reported data on a recently approved combination of enfortumab vedotin and pembrolizumab. Can you tell us more about this abstract, Jeanny? Dr. Jeanny Aragon-Ching: Sure, Neeraj. So, as quick reminder to our audience, this regimen was tested in the EV-302 phase 3 trial, where patients with previously untreated, locally advanced or metastatic urothelial carcinoma were randomized to receive enfortumab vedotin, plus pembrolizumab or gemcitabine plus either cisplatin or carboplatin. These data were also first presented at ESMO 2023 and subsequently published in the . They showed that this immune based combination significantly improved both progression free survival and overall survival, which were the primary endpoints compared to chemotherapy. In this abstract, Dr. Shilpa Gupta from the Cleveland Clinic and colleagues present the results of patient reported outcomes based on quality-of-life questionnaires in this trial. Time to pain progression and time to confirm deterioration were numerically longer in patients treated with EV plus pembro, and patients with moderate to severe pain at baseline receiving this combination had a meaningful improvement in the Brief Pain Inventory Short-Form worst pain from week 3 through 26. Dr. Neeraj Agarwal: Thank you, Jeanny. This means that patients treated with EV plus pembro did not only have improved survival compared with platinum-based chemotherapy, but also improvement in their quality-of-life and functioning, further supporting the value of this combination for patients with locally advanced or metastatic urothelial carcinoma. This is terrific news for all of our patients. Before we wrap up the bladder cancer section, would you like to tell our listeners about which provides the data on the efficacy of trastuzumab deruxtecan in patients with bladder cancer? Dr. Jeanny Aragon-Ching: Yes, Neeraj; this is timely given the recent FDA approval, which we will talk about. The abstract is titled, “Efficacy and Safety of Trastuzumab Deruxtecan in Patients with HER2 Expressing Solid Tumors: Results from the Bladder Cohort of the DESTINY-PanTumor02 Study.” And as a quick reminder, the was a phase 2 open-label study where trastuzumab deruxtecan, an antibody-drug conjugate targeting HER2 expression on cancer cells, was evaluated in patients with HER2-expressing locally advanced or metastatic disease who previously received systemic treatment or who had no other treatment options. The expression of HER2 was evaluated on immunohistochemistry by local or central testing. The primary endpoint was confirmed objective response rate by investigator assessment. Secondary endpoints included duration of response, progression free survival, disease control rate, and safety. The primary analysis, which was published in the Journal of Clinical Oncology, showed an ORR of 37.1% and responses across all cohorts and the median duration of response was 11.3 months. Based on these results, fam-trastuzumab deruxtecan-nxki was just granted accelerated FDA approval for unresectable or metastatic HER2-positive solid tumors in April 2024. So, back to this abstract; Dr. Wysocki and colleagues report the results of the bladder cancer cohort. This study included 41 patients with urothelial cancer and at a median follow up of around 12.6 months, the objective response rate among these patients was 39%, the median PFS was 7 months, and the duration of response median was 8.7 months. The disease control rate at 12 weeks was around 71%. Regarding the safety profile, 41.5% of patients experienced grade ≥3 drug related adverse events and interstitial lung disease or pneumonitis did occur in about 4 patients. Although there was no statistical comparison between different groups, the ORR was numerically highest among the HER2 3+ group with 56.3%. Dr. Neeraj Agarwal: Thank you, Jeanny. So, these data support consideration of trastuzumab deruxtecan as a salvage therapy option for pre-treated patients with HER2 expressing urothelial cancers and show that we are extending our treatment options to include therapies with novel mechanisms of action. This is definitely exciting news for patients with bladder cancer. Dr. Jeanny Aragon-Ching: Yes, absolutely, Neeraj. Now, let's switch gears a bit to prostate cancer. Could you tell us about which is titled, “EMBARK Post Hoc Analysis of Impact of Treatment Suspension on Health Quality-of-Life?” Dr. Neeraj Agarwal: Of course, I'd be happy to. So, enzalutamide was recently granted FDA approval for the treatment of patients with non-metastatic castration-sensitive prostate cancer with biochemical recurrence at high-risk of metastasis, based on the results of the trial, which was a phase 3 study where patients with high-risk biochemical recurrence were randomized to receive either enzalutamide with leuprolide, enzalutamide monotherapy, or placebo plus leuprolide. The primary endpoint was metastasis-free survival with secondary endpoints including overall survival and safety. Results showed that patients receiving enzalutamide alone or enzalutamide plus leuprolide had significantly improved metastasis-free survival compared to those treated with leuprolide alone while preserving health-related quality-of-life. One important aspect in the design of the trial was that patients who achieved undetectable PSA at week 37 underwent treatment suspension. The treatment was resumed if PSA rose to more than 2 ng/ml for patients who underwent radical proctectomy or when PSA rose to more than 5 ng/ml for those who did not undergo surgery. In this Dr. Stephen Freedland and colleagues present a post-hoc analysis of health-related quality-of-life outcomes after treatment suspension between weeks 37 and 205. They found that treatment was suspended in 90.9% of patients receiving enzalutamide plus leuprolide, 85.9% of those receiving enzalutamide monotherapy, and 67.8% of those receiving leuprolide monotherapy. Among those patients who stayed on treatment suspension, a trend toward numerical improvement in health-related quality-of-life after week 37 was seen in all 3 arms and this reached clinically meaningful threshold at week 205 in pain questionnaires, physical well-being, urinary and bowel symptoms. For hormonal treatment side effects, all arms reached clinically meaningful improvement at the subsequent assessments of week 49 to week 97. However, patients slowly deteriorated, with clinically meaningful deterioration at week 205 relative to week 37 in patients receiving the combination of enzalutamide and leuprolide and those treated with leuprolide. Concerning sexual activity, a clinically meaningful improvement was reported only in patients receiving enzalutamide plus leuprolide, possibly because sexual function was better preserved prior to suspension in the enzalutamide monotherapy arm and thus there was less opportunity for “improvement” while on suspension. Dr. Jeanny Aragon-Ching: Thank you, Neeraj, for this great summary. This analysis confirms that treatment suspension in good responders might lead to a clinically meaningful improvements in health-related quality-of-life. Now, moving on to patients with metastatic castration-resistant prostate cancer, what can you tell us, about titled, “Baseline ctDNA analyses and associations with outcomes in taxane-naive patients with mCRPC treated with 177Lu-PSMA-617 versus change of ARPI in PSMAfore”? Dr. Neeraj Agarwal: Sure, Jeanny. The PSMAfore trial was a phase 3 study that compared the efficacy of 177Lu-PSMA-617 versus an ARPI switch in patients with mCRPC and prior progression on a first ARPI, and not previously exposed to docetaxel chemotherapy. The primary endpoint was rPFS and OS was an important secondary endpoint. The presented at ESMO 2023 showed a significantly prolonged rPFS in patients receiving lutetium. In the that will be featured at the 2024 ASCO Annual Meeting, Dr. Johann De Bono and colleagues present an exploratory analysis regarding the associations between baseline circulating tumor DNA and outcomes. ctDNA fraction was evaluated in all samples as well as alterations in key prostate cancer drivers prevalent in more than 10% of participants. The investigators sought to interrogate the association of ctDNA fraction or alterations with rPFS, PSA response, and RECIST response at data cutoff. They showed that median rPFS was significantly shorter in patients with a ctDNA fraction >1% compared to those with a fraction < 1% regardless of the treatment arm. Furthermore, ctDNA fraction >1% was also associated with worst RECIST response and PSA50 response. Regarding prostate cancer drivers, median rPFS was significantly shorter in patients with alterations in the AR, TP53 or PTEN in both treatment arms. There was no significant association between ctDNA alterations and PSA or objective responses. Dr. Jeanny Aragon-Ching: Thank you, Neeraj. So, these results show that the presence of a ctDNA fraction >1% or alterations in AR, P53 and PTEN were all associated with worse outcomes regardless of treatment with lutetium or change in the ARPI. These data are definitely important for counseling and prognostication of patients in the clinic and may guide the design of future clinical trials. Let's move on to kidney cancer. Neeraj, do you have any updates for us? Dr. Neeraj Agarwal: Sure. In titled, “A Multi-institution Analysis of Outcomes with First-Line Therapy for 99 Patients with Metastatic Chromophobe Renal Cell Carcinoma,” Dr. Sahil Doshi and colleagues present a retrospective, multi-institutional study comparing survival outcomes, including time-to-treatment failure and overall survival, between different first-line treatment options in patients with metastatic chromophobe renal cell carcinoma, where limited clinical trial data exists to guide systemic therapy. They categorized patients into 4 treatment groups: and immune checkpoint inhibitors + targeted therapy doublets (such as ICI VEGF TKI); pure immune checkpoint inhibitor monotherapy and doublets (such as ipilimumab plus nivolumab); targeted therapy doublets (such as lenvatinib plus everolimus), and targeted monotherapy (such as sunitinib). They identified 99 patients, of whom 54 patients received targeted monotherapy, 17 received ICI VEGF-TKI, 14 received targeted doublet, and 14 patients received only ICI therapies. So the patients treated with any doublet containing a targeted agent had a 52% decrease in the risk of treatment failure and a 44% decrease in the risk of death compared to those treated with targeted monotherapy. The median time to treatment failure was 15 months with IO-targeted doublet, and the median overall survival was 56 months. Dr. Jeanny Aragon-Ching: Thank you, Neeraj. So, these results show that targeted doublet regimens resulted in a longer time to treatment failure and overall survival compared to any monotherapy in patients with chromophobe metastatic RCC and definitely provides valuable insights on treatment selection, albeit I would say there's still a small number of patients that were included in this retrospective analysis. Dr. Neeraj Agarwal: I completely agree this is a relatively small number of patients, but I decided to highlight the abstract given how rare the cancer is, and it is highly unlikely that we'll see large randomized clinical trials in patients with metastatic chromophobe renal cell carcinoma. So, before we wrap up the podcast, what would you like to tell us about Abstract 5009 which is titled, “A Phase II Trial of Pembrolizumab Platinum Based Chemotherapy as First Line Systemic Therapy in Advanced Penile Cancer: HERCULES (LACOG 0218) Trial.” Dr. Jeanny Aragon-Ching: I'm glad you brought this up, Neeraj. As our listeners may know, advanced penile squamous cell carcinoma has a poor prognosis with limited treatment options. From this perspective, the results of the LACOG 0218 trial are very important. As you mentioned, this was a phase 2 single-arm study evaluating the addition of pembrolizumab to platinum-based chemotherapy as first-line treatment in patients with metastatic or locally advanced penile squamous cell carcinoma not amenable to curative therapy. Patients enrolled received chemotherapy, namely 5-Fluorouracil with cisplatin or carboplatin and pembrolizumab 200 mg IV every 3 weeks for 6 cycles, followed by pembrolizumab 200 mg IV every 3 weeks up to 34 cycles. The primary endpoint was confirmed overall response rate by investigator assessment. In the 33 patients eligible for the efficacy analysis, the confirmed ORR by investigator assessment was 39.4% and included one complete response and 12 partial responses. The confirmed ORR was 75% in patients with high TMB and 55.6% in patients positive for HPV16, making TMB and HPV16 potential predictive biomarkers for efficacy in this study. Concerning the toxicity profile, any grade treatment-related adverse events were reported in around 92% of patients, and grade 3 or more treatment-related adverse events occurred in 51% of patients. 10.8% of patients discontinued treatment due to adverse events. Dr. Neeraj Agarwal: Thank you, Jeanny. I would like to add that HERCULES is the first trial to demonstrate the efficacy of an immune checkpoint inhibitor in advanced penile squamous cell carcinoma with a manageable safety profile. Thus, the combination of ICI with platinum-based chemotherapy is a promising treatment for advanced penile squamous cell carcinoma and warrants further investigation. Dr. Jeanny Aragon-Ching: I agree, Neeraj. Any final remarks before we conclude today's podcast? Dr. Neeraj Agarwal: Jeanny, I really want to thank you for your participation and valuable insights. Your contributions are always appreciated, and I sincerely thank you for taking the time to join us today. Dr. Jeanny Aragon-Ching: Thank you, Neeraj. It was a pleasure. Dr. Neeraj Agarwal: As we bring this podcast to an end, I would like to acknowledge the significant advances happening in the treatment of patients with genitourinary cancers. During our upcoming 2024 ASCO Annual Meeting, there will be an array of different studies featuring practice-changing data presented by researchers and physicians from around the globe. I urge our listeners to not only participate in this event to celebrate these achievements, but to also play a role in sharing these cutting-edge data with healthcare professionals worldwide. Through our collective efforts, we can surely optimize the benefits of patients on a global scale. And thank you to our listeners for joining us today. You will find links to the abstracts discussed today on the transcript of this episode. Finally, if you value the insights that you hear on the ASCO Daily News Podcast, please take a moment to rate, review and subscribe wherever you get your podcast. Thank you very much. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. Find out more about today’s speakers: Follow ASCO on social media: Disclosures: Dr. Neeraj Agarwal: Consulting or Advisory Role: Pfizer, Bristol-Myers Squibb, AstraZeneca, Nektar, Lilly, Bayer, Pharmacyclics, Foundation Medicine, Astellas Pharma, Lilly, Exelixis, AstraZeneca, Pfizer, Merck, Novartis, Eisai, Seattle Genetics, EMD Serono, Janssen Oncology, AVEO, Calithera Biosciences, MEI Pharma, Genentech, Astellas Pharma,...
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Exploring CAR T Cells in GI Cancers at ASCO24
05/25/2024
Exploring CAR T Cells in GI Cancers at ASCO24
Dr. Shaalan Beg and Dr.Mohamed Salem discuss key abstracts that will be presented at the 2024 ASCO Annual Meeting, including hypoxia-response CAR T- cell therapy for solid tumors, GPC3-specific CAR T- cell therapy in hepatocellular carcinoma, and the promising efficacy of targeted therapies in GI cancers. TRANSCRIPT Dr. Shaalan Beg: Hello and welcome to the ASCO Daily News Podcast. I am Dr. Shaalan Beg, your guest host of the podcast today. I'm an adjunct associate professor at UT Southwestern's Simmons Comprehensive Cancer Center. In today's episode, we'll be discussing some key abstracts in GI cancers that will be presented at the 2024 ASCO Annual Meeting. I'm delighted to welcome Dr. Mohammed Salem, a GI medical oncologist at the Levine Cancer Institute at Atrium Health, for this discussion. Our full disclosures are available in the transcript of this episode. Mohammed, it's great to have you back on the podcast. Dr. Mohamed Salem: Thank you, Dr. Beg. It's always a pleasure to be here. Thanks for having me. Dr. Shaalan Beg: So we're seeing more and more exciting data emerge on the role of ctDNA in GI cancers. And that's a topic that we've covered fairly extensively on the podcast. This year, in , investigators used a novel, highly sensitive HPV ctDNA assay to evaluate the clinical outcomes of HPV ctDNA status in people with localized anal cancer treated with chemoradiation. And we know that prior HPV infection is associated with 90% of anal cancers. Can you give us a summary of the and why it's so important to the clinical care we're giving our patients today? Dr. Mohamed Salem: Sure. So, as you already alluded to, in the current era of precision oncology or precision medicine in general, there is an effort to try to maximize treatment efficacy and minimize the side effects. We're trying to understand how to do that by developing more biomarkers. I think this was a very interesting that was led by Dr. Morris of MD Anderson. As you mentioned, he tried to determine the correlation between that circulating tumor DNA at different timelines and also associated that with the relapse. Obviously, as we all know, HPV infection is linked to about over 90% of anal cancers, and anal cancer is increasingly common in the U.S. The study design includes patients from stage 1, 2, and 3 anal cancer treated with curative intent concurrent chemo radiation and the plot sample to collect circulating DNA was taken at five weeks of treatment and then at various intervals, including 3months, 6 months, 9 months and 12 months, to detect the HPV circulating DNA. And the analysis was done to correlate detection of circulating DNA with a relapse. So what they observed is after collecting the samples at the end of the treatment, which is 5 weeks, followed by 3 months, 6 months, 9 months, and 12 months following treatment using the correlation between the detection of circulating tumor DNA as well as the recurrence rate, they were able to identify that about 22% was seen at 5 weeks, 13% was seen at three months, then 10% was seen at 6 months, and 0% actually was seen at 12 months. In the final analysis, they concluded that detection of circulating DNA at 3 months was significantly associated with a relapse rate of those patients. And also, they looked at the baseline stage, T stage, end stage, age and other perhaps prognostic factors. But the clinical implication of that trial is this finding supports the potential of integrating now the circulating DNA analysis and routine post-treatment surveillance, which hopefully will help us identify those patients with high risk of relapse and whether in context-free drug trial or even like more close surveillance. Obviously, this is a very novel , so it needs validation. Also, we need to understand more about the platform used because with the immersion technology and how fast this field is moving, I think it's important to look at this platform or other platforms. I think as a concept it’s very interesting and hopefully will help us to identify patients with higher risk. So, I'm looking forward to hearing the full presentation. Dr. Shaalan Beg: Moving on to colorectal cancer, is a trial of hypoxia-responsive CEA CAR T-cell therapy for people with heavily pretreated solid tumors where this was administered intraperitoneally or intravenously. And you know, as a solid tumor oncologist or GI oncologist, we've been watching the hematologic space evolve so dramatically in the last five years with cellular therapies that it's exciting to see these CAR T-cell approaches being applied in solid tumors with some results. So can you talk about this study and whether you think it will influence clinical practice? Dr. Mohamed Salem: Of course, I'm actually very excited to see this because as you mentioned, CAR T-cell therapy has been utilized in hematological malignancies for the last several years and in fact it's becoming a center of care. As you know, it's very effective in certain tumors. Unfortunately, we did not see a similar result in solid tumors thus far. I know we are trying to make progress, but we are definitely not seeing the same efficacy in solid tumors. And also, of course, in CRC and many other tumors, we need more target options, so I was very excited to see this . And I want to give a little bit of background why this abstract is important. Many solid tumors have a low oxygen level environment, hypoxia obviously, which can impact the effectiveness of CAR T therapy. So hypoxia can suppress the immune response, leading to poor performance of the immune cells like the T cell within the tumor. The investigators, to overcome that challenge, meaning hypoxia impacting the efficacy of the T cell, they were actually able to engineer a CAR T cell to be hypoxia responsive. And what does that mean? That the cells are designed to become more active in low oxygen conditions, which is more difficult in many of the solid tumors. The reason that's very interesting is because, one, it reduces exhaustion of the T cell, meaning like when you have the T cell active all the time, they get exhausted. So when you have the T cell in the resting state, until they reach the tumor environment and they get activated by the hypoxia status, now you reduce the expulsion of the T cell. But also that one overcomes the resistance. So once activated in the tumor hypoxic environment, this CAR T cell shows increased efficacy in targeting and killing the cancer cell. Based on that concept, the investigators conducted a phase 1 dose escalation study in solid tumors. So this was a phase 1 open label group escalation study involving patients with tumor suppressed CEA and also had relapsed refractory second line treatment. The trial actually included 2 routes of administration, which I think was very interesting – IV versus intraperitoneal, IP, way of administration. And they enrolled about 40 patients between June of 2022 and January 2023. And 35 patients had colorectal cancer, 3 patients had gastric cancer, and 2 patients had non-small cell lung cancer. Overall, there was no surprising safety data. In terms of side effects, it was largely macrocystis, colitis. Unfortunately, they had 1 treatment that did not finish. But the interesting feature was the efficacy of that concept was demonstrated and in fact they were able to see more disease response and control at this rate with IP infusion, which I think is a very novel approach. I would look forward to trying and looking into this kind of delivery, especially in CRC and other tumors. Dr. Shaalan Beg: Because we've known that historically managing disease intraperitoneally has been challenging with cytotoxic chemotherapies and even surgical approaches that have been deployed can be fairly morbid as well. So looking at novel delivery mechanisms can help us understand, maybe be able to manage side effects of treatments in different ways and open doors for treatment in diseases that otherwise we couldn't manage. So definitely a very novel and exciting approach on this study. Dr. Mohamed Salem: I agree. I think the idea of administering an IP route is a very interesting idea. Well, Shaalan, there is another study in CRC, . This is the first human study of ABBV-400, cMET–targeting antibody-drug conjugate in advanced solid tumors. Can you tell us about this promising data? Dr. Shaalan Beg: Yeah, so we've known that cMET is a very relevant biomarker across many cancers, particularly colorectal cancer, and it is overexpressed in a fairly large proportion of multiple diseases. But there hasn't been an effective regimen that has been found to be tolerable to target this specific biomarker. In this study, the investigators are evaluating an antibody drug conjugate, which takes the cMET targeting antibody telisotuzumab and conjugates it to a novel topoisomerase one inhibitor payload. And there's a phase one study that enrolled people across multiple different tumor types. This was presented at ASCO 2023. And this year, the investigators are coming in and giving the results of a colorectal cancer cohort within that study. Patients were enrolled in the dose escalation phase, and in the dose expansion phase, there were 122 colorectal cancer cases; so a fairly healthy size colorectal cancer population. And the median number of prior lines of therapy was 4, which is fairly consistent with what we would expect in our clinical population for people with colorectal cancer. So what they found in terms of efficacy is that the response rates, the confirmed overall response rates, were between 15 and 20%, depending on what dose of the medication the patients had received. They enrolled people regardless of cMET expression and then evaluated the response based on a higher or lower cMET expression. And those with higher cMET expression had an overall response rate of >30%, while those with lower cMET expression had a response rate of 10 to 15%. So they still had a response rate, which for fifth-line colorectal cancer is something to be aware of and it could be a marker of more significant clinical activity than other treatments that are out there. And with the antibody drug conjugates, it's also important for us to keep an eye on the side effect profiles because a lot of these agents can have distinct side effect profiles that otherwise we wouldn't be familiar with. And in this study, 64% of participants had a grade 3 or above treatment emergent adverse events, and 41% had serious adverse events. So definitely something to think about. And most of these were hematologic toxicities, 30% had grade 3 or worse anemia. Neutropenia was seen, in grade three and above, was seen in 25%, leukopenia or grade three and above was seen in 12%, and thrombocytopenia again around 12%. And the non-hematologic toxicities were nausea, fatigue, vomiting and diarrhea. There was some interstitial lung disease, pneumonitis, which was seen in 7% of the total population, of which 2% had grade three or above. So definitely something to think about. From my perspective, I really am excited about this because we're seeing evidence of clinical activity focused on cMET for refractory colorectal cancer compared to other agents that are out in the market. If this pans out in future studies, it could definitely change the way we deliver our treatments. Dr. Mohamed Salem: I totally agree that we actually need more therapy for those patients. And I'm not surprised that the myelosuppression, as you mentioned, was in fifth-line treatment. So this patient had large exposure to cytotoxic agents before. So, looking at CAR T once more, there is a very interesting , which is a study of C-CAR031, a GPC3-specific TGFβRIIDN armored autologous CAR T, in patients with advanced hepatocellular carcinoma (HCC). What are your key takeaways from this study, Shaalan? Dr. Shaalan Beg: This is a first-in-human . It enrolled people with advanced HCC who failed on one or more lines of prior therapy and they were given one single infusion of C-CAR031 after standard lymphodepletion and they enrolled 24 patients across 4 dose levels. If we look at the overall response rate, 50% of the 22 people who were eligible for response assessments had a partial response. This response rate varies based on the dose level itself and the investigators claim a 90% disease control rate. So definitely when we think about standard treatments for hepatocellular cancer after first line therapy, this is something which will catch a lot of people's attention. Again, with CAR T-cell therapy, we need to be aware of the risk of potential toxicities. There were no dose limiting toxicities and CRS or cytokine release syndrome was observed in 91% of patients, while a very small proportion, about less than 5%, had grade three CRS. Most of the side effects here were, again, lymphocytopenia, neutropenia, thrombocytopenia, and some transaminitis in 16% of patients. They did see tumor reduction in 90%, not only in the intrahepatic disease, but also in the extrahepatic disease. And again, these are people who had BCLC stage C disease. So this included people with hepatic and extrahepatic metastases. And in terms of prior lines of therapy, 96% of patients had either received immune checkpoint inhibitors and TKIs. If we think about how some other immune therapy regimens are being developed in the GI cancer space, there is some indication that liver lesions may respond differently compared to extra hepatic disease. So in this case, they saw responses in both scenarios, which makes it very exciting, because even though we've seen many approvals of TKIs and immunotherapy, anti-androgenic therapy in hepatocellular cancer, the treatment of these patients is still extremely difficult because of their underlying hepatic dysfunction. And it'll be very interesting to see how this treatment unfolds. Dr. Mohamed Salem: You summarized it very well, Shaalan. I echo your thoughts. What is also interesting about that study, it's actually targeted at the GPC strain, which is prevalent in HCC but not normal tissue, which goes back to your comment about the toxicity, and hopefully we can also manage treatment in the context of underlying liver disease. Dr. Shaalan Beg: I guess it's fair to say that we're both very excited to see what's ahead in GI cancers at the Annual Meeting. Mohamed, thanks as always for sharing your great insights with us on the ASCO Daily News Podcast. Dr. Mohamed Salem: Thank you all for having me, and I'm looking forward to meeting you and all our colleagues in Chicago in a couple of weeks. Dr. Shaalan Beg: And thank you to our listeners for your time today. You'll find links to the abstracts discussed today in the transcripts of this episode. I'll be back to cover late breaking abstracts and other key advances in GI oncology after the annual meeting, so please join me for more key insights from ASCO24 and on the ASCO Daily News Podcast. Finally, if you value the insights that you hear on the podcast, please take a moment to rate, review, and subscribe wherever you get your podcasts. Disclaimer: The purpose of this podcast is to educate and to inform. This is not a substitute for professional medical care and is not intended for use in the diagnosis or treatment of individual conditions. Guests on this podcast express their own opinions, experience, and conclusions. Guest statements on the podcast do not express the opinions of ASCO. The mention of any product, service, organization, activity, or therapy should not be construed as an ASCO endorsement. Find out more about today’s speakers: Follow ASCO on social media: Disclosures: Dr. Shaalan Beg: Consulting or Advisory Role: Ispen, Cancer Commons, Foundation Medicine, Genmab/Seagen Speakers’ Bureau: Sirtex Research Funding (An Immediate Family Member): ImmuneSensor Therapeutics Research Funding (Institution): Bristol-Myers Squibb, Tolero Pharmaceuticals, Delfi Diagnostics, Merck, Merck Serono, AstraZeneca/MedImmune Dr. Mohamed Salem: Consulting or Advisory Role: Taiho Pharmaceutical, Exelixis, Bristol-Myers Squibb, Exelixis, QED Therapeutics, Novartis, Pfizer, Daiichi Sankyo/Astra Zeneca Speakers' Bureau: Genentech/Roche, Taiho Pharmaceutical, Daiichi Sankyo/Astra Zeneca, BMS, Merck
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ASCO24: The Future of Personalized Immunotherapy
05/24/2024
ASCO24: The Future of Personalized Immunotherapy
Dr. Diwakar Davar and Dr. Jason Luke discuss key abstracts from the 2024 ASCO Annual Meeting that explore triplet therapy in advanced melanoma, TIL cell therapy in immune checkpoint inhibitor–naive patients, and other novel approaches that could shape the future of immunotherapy in melanoma and beyond. TRANSCRIPT Dr. Diwakar Davar: Hello and welcome to the ASCO Daily News Podcast. I am your guest host, Dr. Diwakar Davar. I'm an associate professor of medicine and the clinical director of the Melanoma and Skin Cancer Program at the University of Pittsburgh's Hillman Cancer Center. I'm delighted to have my friend and colleague, Dr. Jason Luke, on the podcast today to discuss key abstracts in melanoma and immunotherapy that will be featured and highlighted at the 2024 ASCO Annual Meeting. Dr. Luke is an associate professor of medicine, the director of the Cancer Immunotherapeutic Center, as well as the associate director for clinical research at the University of Pittsburgh's Hillman Cancer Center. You will find our full disclosures in the transcript of this episode. Jason, as always, it's a pleasure to have you on this podcast to hear your key insights on trials in the immunotherapy space and melanoma development paradigm, and to have you back on this podcast to highlight some of this work. Dr. Jason Luke: Thanks so much for the opportunity to participate. I always enjoy this heading into ASCO. Dr. Diwakar Davar: We're going to go ahead and talk about three abstracts in the melanoma space, and we will be starting with . Abstract 9504 essentially is the RELATIVITY-048 study. It describes the efficacy and safety of the triplet nivolumab, relatlimab, and ipilimumab regimen in advanced PD-1 naive melanoma. So in this highlighted by Dr. Ascierto and colleagues, they report on the results of this phase 2 trial in this setting. By way of background, PD-1 inhibitors and immune checkpoint inhibitors starting in PD-1 and CTLA-4, as well as PD-1 and LAG-3, are all FDA-approved on the basis of several pivotal phase 3 trials, including , , , and most recently, . Jason, can you briefly summarize for this audience what we know about each of these drugs, at least the two combinations that we have at this time? Dr. Jason Luke: For sure. And of course, these anti PD-1 agents, became a backbone in oncology and in melanoma dating back to more than 10 years ago now, that response rates in the treatment-naive setting to anti PD-1 with either pembrolizumab or nivolumab are roughly in the range of mid-30s to high-40s. And we've seen clinical trials adding on second agents. You alluded to them with the seminal study being , where we combined a PD-1 antibody and CTLA-4 antibody or nivo + ipi. And there the response rate was increased to approximately 56%. And more recently, we have data combining PD-1 inhibitors with anti-LAG-3. So that's nivolumab and relatlimab. Now, in that trial, , the overall response rate was described as 43%. And so that sounds, on a first pass, like a lower number, of course, than what we heard for nivolumab and ipilimumab. We have to be cautious, however, that the cross-trial comparison between those studies is somewhat fraught due to different patient populations and different study design. So I think most of us think that the response rate or the long-term outcomes between PD-1, CTLA-4, and PD-1 LAG-3 are probably roughly similar, albeit that, of course, we have much better or much longer follow up for the nivo + ipi combo. The one other caveat to this, of course then, is that the side effect profile of these two combinations is distinct, where the incidence of high-grade immune-related adverse events is going to be roughly half with nivolumab and relatlimab, a combination of what you would see with the nivolumab and ipilimumab. So that has caused a lot of us to try to think about where we would use these different combinations. But we do see that all of these treatments can land a durable long-term response in the subset of patients that do have an initial treatment benefit. The landmark, I think, for the field has been the 7-and-a-half-year median overall survival that we've seen with PD-1 plus CTLA-4, nivo + ipi; of course, we don't have such long-term follow up for PD-1 and LAG-3. But I think that's the setting for thinking about the rationale for combining a triplet regimen of PD-1, CTLA-4, and LAG-3. Dr. Diwakar Davar: So, Jason, in your mind, given the difference in the disparity and durability of the responses for the 067 regimen of nivo-ipi, and the regiment of nivo-rela, what is the standard of care in the U.S., and how does it change in the rest of the world, knowing that nivo-rela is not necessarily approved in all jurisdictions? Dr. Jason Luke: So this is a major complication in our field, is that there is perhaps not complete agreement across the world in terms of what the frontline standard of care should be. I think most United States investigators, or those of us that really treat melanoma most of the time, would suggest that a combination regimen, given the enhanced response rate and longer-term outcomes, should be the consideration for the majority of patients. In fact, in my practice, it's hard to think of who I would treat with a monotherapy PD-1 approach in the PD-1 naive setting. So either nivo + ipi or nivo + rela. As you alluded to however, in other regulatory settings throughout the world, combinations might not actually even be approved at this point. So PD-1 monotherapy would be the backbone of that setting. It does set up some complications when you think about a comparator arm; say you were going to look at various combinations, probably PD-1 monotherapy would be the worldwide comparator. You have to understand though, in the United States, I think that that's a less attractive option. Dr. Diwakar Davar: So in , Dr. Ascierto and his colleagues are looking at generating a triplet. And in this case, they looked at this in the context of frontline metastatic melanoma, 46 patients. Very interestingly, the dose of ipilimumab studied here was 1 mg/kg through 8 weeks, not the 3 mg/kg every three weeks times four doses using 067, or even the low dose ipilimumab regimen that you studied in the second line setting, which was 1 mg/kg every 3 weeks for 4 doses. So let's talk about the results and specifically the implications of potentially studying lower doses of ipi. Dr. Jason Luke: I appreciate you raising that point. I think it's really important as we think about this dataset because this triplet regimen is not by any means the only version of a triplet that could be developed using these agents. So just to give the high-level numbers from the , we see from these data that the overall response rate is described as 59% and 78%, a disease control rate with patients having an unreached link. So duration of response of unreached, and then the progression-free survival at about 5 months. So those are really interesting data. But as was alluded to, it's not totally clear to me that that's the best that we could do with this regimen. Now, you alluded to this low-dose ipilimumab schedule at 1 mg/kg every 8 weeks, and it's really important to note that we have no benchmark for that regimen in melanoma oncology. And in fact, the one study that used that regimen, which was the adjuvant study of nivolumab and ipilimumab, known as , is in fact the only immune checkpoint inhibitor study in melanoma oncology that was actually negative. That study noted no benefit to adding ipilimumab at 1 mg/kg every 8 weeks on top of nivolumab, again, the adjuvant setting. So it's a little bit curious to then understand what it means in this study to have that amount of ipilimumab added to the rela-nivo backbone. And that manifests in a few different ways. We see the response rate here at 59%. Again, if you compare that just against the standard nivo + ipi dosing schedule, it's about the same. So is that really an advantage to having the triplet as compared to just doing standard nivo + ipi? We do see that it manifests in a slightly lower rate of grade 3/4 immune-related adverse events, at 39%. That's a little bit lower than what we'd expect for standard nivo + ipi. But again, I think that that emphasizes to me the possibility that some efficacy was left on the table by using this very low dose ipilimumab regimen. I think that's really a concern. It's not clear to me that these triplet data really differentiate from what we'd expect with the already approved regimen of nivo + ipi. Therefore, it makes it difficult to think about how would we really want to move this regimen forward, or should there be more work done about dose and schedule to optimize how we might want to do this? Dr. Diwakar Davar: As far as triplet therapy in the context of frontline metastatic melanoma, meaning triplet immune therapy, because there are at least several targeted therapy triplets that are FDA-approved, [but] not necessarily widely utilized. How would you summarize the future for triplet therapy? Do you think it's potentially attractive? Do you think it's very attractive with some caveats? Dr. Jason Luke: Well, I think it's attractive, and we have 3 independently active agents. And so I do think it's a priority for the field to try to figure out how we could optimize the therapy. We've had such a revolution in melanoma oncology, talking about 7.5-year median survival from , but that still implies that 7.5 years, half the patients have passed away. There's more to do here. And so I do think it should be a priority to sort this out. I guess I would be cautious, though, about advancing this regimen directly to a phase 3 trial because it doesn't seem clear to me that this is optimized in terms of what the outcome could be. If we're willing to tolerate higher rates of toxicity from other dose schedules of nivo-ipi alone, then I think we should do a little bit more here to potentially explore the space that might be possible to increase that overall response rate a little more without getting into a completely exaggerated toxicity profile that would be unacceptable. So, I do think it's exciting, but there’s possibly more to do before really think about going big time with this. Dr. Diwakar Davar: Great. So now we'll switch gears and move from frontline metastatic melanoma to the second line and beyond looking at a new agent and contextualizing the effects of that actually in the frontline settings. So describes the efficacy and safety of lifileucel, which is essentially autologous tumor-infiltrating lymphocyte cell therapies, also known as TIL, in combination with pembrolizumab in patients with ICI naive, so not necessarily pretreated, but ICI naive metastatic or unresectable melanoma. This is data from the IOV-COM-202 Cohort 1A oral abstract presented by Dr. Thomas and colleagues. In this abstract, Dr. Thomas and colleagues are presenting data from the 1A cohort, which is the phase 2 portion of the frontline trial that is evaluating autologous TIL with pembro in checkpoint inhibited naive metastatic melanoma. By way of background, TIL is FDA approved on the basis of several cohorts from a phase 2 trial. The data has been presented multiple times now by Drs. Sarli, Chesney, and multiple colleagues of ours. And essentially autologous TIL, which is generated from a surgical procedure in which a patient undergoes a surgery to extract a tumor from which T cells are then grown after ex vivo expansion and rapid expansion protocol. The entire procedure was essentially pioneered by several colleagues at the NCI, primarily Dr. Steve Rosenberg, and this approach produces objective response rates of approximately 31% to 36%. And the most recent publication demonstrated that at median follow up of approximately 2 years, the median duration of response was not reached. The median OS was about 14 months and PFS was about 4 months or so. So, can you contextualize the results of the abstract in the frontline setting? And then we'll talk a little bit about where we think this is going to go. Dr. Jason Luke: So I think this is a timely study given the recent approval. And in the presented here, we see an early data cut from the PD-1 naive study, as you alluded to. So here we had 22 patients and distributed across various states of advanced melanoma. Ten out of the 22 had M1C, but there also were smatterings of earlier M1A and M1B at 18.2% and 9.1%. So this is important, as we think who the treatment population is that's going to be optimized with a TIL procedure. The median sum of diameters, meaning how much tumor burden the patients have, was about 5.5cm, and I'll note that that's a relatively modest amount of tumor burden, albeit not that unusual for an early-stage trial. So of the patients that participated, 8 had BRAF mutations so that's 36%. That's not that high, but it's reasonable. And I think the important overlying number, the response rate so far in the study, with about 17 months of follow up, was 63.6%, and that includes 22% or 23% having complete response. So those are interesting data. And another point that was made in the , which we've all seen, is that responses to TIL, all of immunotherapy but especially TIL, do seem to mature over time, meaning they deepen over time. So it's possible the response rate could go up some extent as we watch this study advance. So I think these are exciting data on some level. Also, a 63.6% response rate sounds pretty impressive, but we do have to put that in the context of a double checkpoint blockade, which we just got done discussing, gives you almost a 60% response rate, 59% response rate. So then the question really is: Is it worth the amount of effort that we could go into generating a TIL product in a treatment naive patient, and put them through the lymphodepletion that is associated with TIL and the high dose interleukin 2 treatment that accompanies the reinfusion of the TIL, if you're going to get a response rate that's roughly the same as what you would get if you gave them off the shelf nivo plus ipilimumab? At this point it's a little bit hard to know the answer to that question. I think it could be possible that the answer is yes, because we don't know exactly which populations or patients are most likely to benefit from each of these therapies. And if it could be teased out who's not going to benefit to nivo + ipi from the get-go, then of course, we would want to offer them a therapy that has that frontline potential, durable, long-term response. But I have to say, on a one-to-one with TIL therapy, you get a lot of toxicity initially with the treatment; with nivo + ipi on the back end, you get a fair amount of toxicity with the treatment. How are we going to judge those two things? And I think we probably need a larger dataset to really have a good handle on that. So these are interesting early data, but it's not totally clear to me that even if this holds up all the way through the trial, and we're going to talk about the design of the registration trial here in a second, a 60% response rate on its own without further biomarker stratification is a little bit hard for me to see in clinical practice why we would want to do that, given we can already just go off the shelf and give checkpoint inhibitors. Dr. Diwakar Davar: So that brings us to . So TILVANCE is a phase 3 trial. It's a registration intent trial by our Iovance colleagues evaluating the pembro-TIL regimen versus pembrolizumab alone. So in this phase 3 trial, approximately 670 patients will be randomized to either arm A, which is lifileucel + pembro. And in this arm A, patients are going to be getting lifileucel with the tumor resection, non-myeloablative lymphoid depletion, the lifileucel and abbreviated course of high-dose IL-2, and thereafter, continued pembro for the study mandated duration versus arm B, where patients will be getting just pembrolizumab monotherapy per label. Arm B patients, per the design, may cross over to receive TIL monotherapy at the time of central-blinded, radiology-confirmed disease progression. The study design otherwise is fairly routine and, per most of our registration trials these days, patients have actually been permitted to receive neoadjuvant and adjuvant therapy, including checkpoint inhibitors, as long as the receipt of the therapy was more than 6 months prior to the inclusion of the patient in that registration trial. The dual primary efficacy endpoints as stated are BICR-assessed objective response rate as well as PFS, and the key secondary endpoint is overall survival. So Jason, what are your thoughts on the study design and potentially the regulatory implications, particularly given, one, the control arm of pembro monotherapy, and two, the role of TIL crossover to receive TIL monotherapy at the time of BICR mandated progression for arm B? Dr. Jason Luke: So this goes to a few points that we've touched on already in the discussion here. When we think about the primary endpoints for this study, with one of them being overall response rate, one has to assume that that's a given that they would get that. I feel like that's a low bar. And we go back to that cross-trial comparison. If their results end up being that the response rates are about 60%, I don't know that that differentiates necessarily from what's already available in the field with combination immune checkpoint blockade. For the purposes of the study that would mean it's a positive study, so I think that would probably be good. But again, the comparator to pembrolizumab monotherapy, I think some of us would argue, isn't really consistent with what we would do with a patient in our clinic. So it's not that it's bad per se, but I think there's going to be a whole lot of cross-trial comparison. So if the study is positive, that would be good for getting the drug available. It's still a bit hard though, based on the preliminary data that I've seen, to imagine how this would have uptake in terms of utilization as a frontline therapy. You alluded to the crossover, and I think there, the assumption is that patients who get TIL therapy as a second line perhaps would have an attenuated benefit. But I'm not sure that's really true. It certainly looks from the data that we have, like the patients who benefit most from TIL are going to be those who didn't respond to anti PD-1 in the front line. So I'm not sure how much difference there's going to be between first- and second-line TIL therapy, but those data will kind of wait to be seen. So I think it's an important . Of course, the accelerated approval of TIL as a later line therapy is dependent on this trial being positive. So there is some risk that if this trial ended up not being positive, that that could have regulatory implications on the utility or availability of TILs, a subsequent line therapy. But all of these, I guess we'll have to wait to see the results. We do hope for a positive trial here, although I think it'll be nuanced to sort of interpret those data given that pembrolizumab monotherapy control arm. Dr. Diwakar Davar: Fantastic. So we've learned a lot about TIL, both its use in the second-line setting and this very exciting but potentially risky frontline trial that is ongoing at some centers in the United States and certainly a lot of ex-U.S. enrollment. So we'll now pivot to a related product which actually belongs to a much larger class of agents that are antigen specific T-cell therapies in a variety of different formats. And that is , which is the “Phase 1 safety and efficacy of IMC-F106C, a PRAME × CD3 ImmTAC bispecific, in post-checkpoint cutaneous melanoma (CM).” Now, in this abstract, Dr. Omid Hamid and colleagues reported the results of this phase 1 trial. As a disclosure, I'm an...
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Novel Approaches in Hematologic Malignancies at ASCO24
05/24/2024
Novel Approaches in Hematologic Malignancies at ASCO24
Dr. John Sweetenham and Dr. Marc Braunstein look ahead at key abstracts across the spectrum of hematologic malignancies that will be presented at the 2024 ASCO Annual Meeting, including the OPTIC trial in chronic myeloid leukemia, treatment options for transplant-ineligible patients with multiple myeloma, and the 7-year analysis of the ECHELON-1 trial in classical Hodgkin lymphoma. TRANSCRIPT Dr. John Sweetenham: Hello, I'm Dr. John Sweetenham from UT Southwestern's Harold C. Simmons Comprehensive Cancer Center and the host of the ASCO Daily News Podcast. I'm delighted to be joined again this year by Dr. Marc Braunstein, a hematologist and oncologist at the NYU Perlmutter Cancer Center in New York. We're going to be discussing some of the key abstracts in hematologic malignancies that will be featured at the 2024 ASCO Annual Meeting. Our full disclosures are available in the transcript of this episode, and disclosures of all guests on the podcast are available at . Marc, it's great to have you back on the podcast. Dr. Marc Braunstein: It's a pleasure to be back, John. Dr. John Sweetenham: There are some exciting abstracts to be presented at this year's meeting, and I would like to begin, if we can, with . As you know, this reports the four-year results from the trial of ponatinib in patients with chronic-phase CML and the T315I mutation. Can you tell us about the trial and about these latest follow-up results? Dr. Marc Braunstein: Sure. Well, we've made tremendous progress in managing patients with CML in the past two decades using these oral tyrosine kinase inhibitors such as ponatinib. Ponatinib is a third-generation TKI that has activity in both Philadelphia-positive ALL as well as CML, and can overcome the resistance mutation you mentioned, called the T315I mutation, which is sometimes found following prior TKI therapy. The study is a multicenter phase 2 randomized study of various doses of ponatinib in 283 chronic phase CML patients who had received 2 or more prior lines of therapy or those who had the presence of a T315I mutation, with the current analysis examining the major remission at 48 months, PFS, as well as OS. Of note, in this study, after patients have achieved a major remission with a transcript level of 1% or less, the study allowed for dose reduction of ponatinib from the original dose of either 45 milligrams or 30 milligrams to a reduced dose of 15 milligrams. So, when we look at the results, we find that the patients who had the highest overall response rates and higher rates of molecular remission were those who received the 45-milligram dose. And remember, these patients were allowed to be dose-reduced to the 15-milligram dose once they achieved a molecular remission of 1% or less. In addition, the rates of overall survival were highest in the 45-milligram dose as well. When looking at the T315I subgroup, the rates of molecular remission, the depth of remission, and the rates of progression-free survival, in general, were lower in that subgroup, but still higher in the 45-milligram dose than the 35- milligram dose. Furthermore, when looking at the rates of treatment-emergent adverse events leading to discontinuation, they were 8% in the 45-milligram dose compared to 14% in the 30-milligram dose and 5% in the patients who only received the 15-milligram dose. The authors have concluded that the 45-milligram dose, with the potential to be reduced to 15 milligrams after achieving 1% or less of the BCR-ABL transcript level, seems to be the right balance between efficacy and safety. Dr. John Sweetenham: Thanks, Marc. In the longer term, do you think that this will, in any way, affect the position of ponatinib in the treatment algorithm for CML? Is it going to remain as a second or third-line option, or do you think there's any chance it will be moved up? Dr. Marc Braunstein: Well, that's a great question. There are other TKIs, such as asciminib, that also target the T315I mutation, and that mutation tends to develop after prior first-line or second-line TKI therapy. But given its activity in both ALL and CML, I think it's certainly reasonable to expect that ponatinib will be used in earlier lines of therapy given its efficacy in later lines. Dr. John Sweetenham: Let's change gears and move the focus to acute myeloid leukemia. There has been a lot of discussion around frailty in many different malignancies, but the impact of frailty on outcomes in AML is maybe something that hasn't been quite so well studied. In , investigators did a population-based study in Ontario, Canada, that assessed the patient's frailty risk and the impact that might have on outcomes. What are your takeaways from this study, and how do you think these data will help optimize treatment decisions? Dr. Marc Braunstein: Yeah, I'm glad we're talking about this abstract John, because frailty scores are increasingly being used in hematologic malignancies to help guide goals and intensity of care. And as opposed to using age or performance status alone, these composite frailty assessment tools, such as the MFI tool that they used in this particular study, take into account multiple variables that are both physiologic, such as the patient's comorbidities, as well as social, and what kind of support system do they have, and things of that nature. And that accounts for their overall fitness. So, in this retrospective cohort that was a population-based study in Ontario between 2006 and 2021, they looked at 5,450 patients retrospectively with acute leukemia and grouped those patients into 3 categories based on this frailty index. Patients who are either fit, somewhere in the middle between fit or frail, which they call pre-frail, or frail. And they looked at outcomes such as overall survival, comparing patients who got intensive chemotherapy regimens for induction or those who got non-intensive therapy for induction. Patients in either group could have been assigned to either fit, pre-frail, or frail although there are much more fit patients than those who got intensive induction. And so, looking at their findings, it was noted that patients who were in the frail category, not entirely unexpectedly, had lower overall survival when compared to those who were fit or pre-frail. I think the value of a study like this is not just to highlight the benefit of frailty scores to help predict which patients may ultimately have a shorter survival, but also to help potentially guide which patients may be more suitable for intensive versus less intensive induction. I will note that this was conducted in an era where we didn't have the same sorts of less intensive induction that are very effective in less fit patients, such as the combination of azacytidine and venetoclax, which is commonly used in less fit patients nowadays. So, the study may encompass patients who didn't have access to that therapy because it wasn't available during that time. But I think it still, overall, does highlight the fact that assessing fitness or frailty in acute myeloid leukemia is important for predictive value. Dr. John Sweetenham: I agree. Marc, I don't know what your thoughts are on this, but it goes either way. I mean, I think that, if I remember the numbers correctly, 25% of fit patients received non-intensive therapy. So, is there a missed opportunity there for that group of patients who actually may have tolerated the intensive therapy but it was never offered? Dr. Marc Braunstein: That's an excellent point, John, and I think that highlights the importance of frailty indices because they take into account much more than one particular factor, or even just a subjective assessment of the patient in real time when they’re first presenting. And they may have disease-specific features that are decreasing, say one element of their assessment such as their performance status. So, really taking these composite fitness scores into account may actually allow you to escalate therapy in a patient who may actually be fit but maybe perceived as less fit when they present. Dr. John Sweetenham: Yeah. So, I think, as you mentioned, there are better treatment options out there now maybe than there were at the time this study was conducted. Nevertheless, there may still be that opportunity for more intensive therapy for some of these patients when they are more holistically assessed. Let's move on and switch gears once again and talk about a study in multiple myeloma, the so-called study, which is . So, this is a study looking at treatment options for transplant-ineligible patients with newly diagnosed multiple myeloma. Some of these patients may not have a chance for subsequent therapy if they are not eligible for transplant. What are your thoughts on this study? Do you think we're closer to a new standard of care for patients who are not going to proceed to an autologous stem cell transplant? Dr. Marc Braunstein: It seems like every year there's a new standard of care for newly diagnosed multiple myeloma because there's so much data emerging, which is just wonderful. So, I think as background, at the 2023 ASH meeting, the study was presented, which is a randomized phase 3 study in newly diagnosed transplant-eligible patients. And that was using isatuximab with carfilzomib, lenalidomide, and dexamethasone upfront and that study did show a benefit in terms of reducing minimal residual disease compared to carfilzomib, lenalidomide, and dexamethasone alone. But that was looking at fit newly diagnosed patients who were going on to stem cell transplant. Right now, the standard of care for patients who are not eligible for transplant is generally to use a 2 or 3-drug regimen, such as daratumumab, lenalidomide, and dexamethasone, based on the phase 3 study. But this study is really unique in that it looks at using a quadruplet regimen in patients who are transplant ineligible or not intended to go for transplant. So, the phase 3 study was a randomized study of 446 patients that compared isatuximab, bortezomib, lenalidomide, and dexamethasone to bortezomib, lenalidomide, and dexamethasone alone. So, a quad versus a triplet regimen. The primary endpoint in this was progression-free survival, but they also looked at secondary endpoints, such as complete response rate and minimal residual disease negativity. Just to quickly highlight the results and then discuss the standard of care, the median duration of treatment in this study was 53 months in the quad regimen and 31 months in the control arm. At a median follow-up of about 60 months, the progression-free survival was not reached with the quad regimen versus 54 months in the triplet, and that was a significant difference. In addition, the safety profile was pretty much consistent with the class, there were a bit more grade three or higher treatment-emergent adverse events with the ESA-containing regimen, 92% versus 84%, but no difference in adverse events leading to discontinuation in either arm. So, this is certainly compelling in terms of using quadruplet-based regimens that contain an anti-CD38 monoclonal antibody for newly diagnosed patients who are not intended to undergo transplant. I think at the meeting, I will be interested to see the patient population that was included. Patients who are over the age of 80, for example, are excluded. So, I would like to know more about their fitness level and performance status. But I think it’s clear, John, that using quad regimens over triplet regimens is just consistently superior in terms of efficacy outcomes. Dr. John Sweetenham: Right. I guess that, even though maybe we can’t focus on the specific agents right now, it looks as if quad regimens are going to be the standard of care regimens for the future in this group. Do you think that is fair? Dr. Marc Braunstein: Very likely. Dr. John Sweetenham: Absolutely. Well, that's a pretty challenging group of patients. And so to move on again, let's talk about another, perhaps equally challenging group - patients with mantle cell lymphoma, particularly those who carry certain mutations. The so-called study, which is reported in , presents data on the efficacy and safety of ibrutinib and venetoclax in patients with mantle cell lymphoma who carry a TP53 mutation. We know that this mutation confers a high risk of early progressive disease and poorer outcomes when these patients are treated with standard chemoimmunotherapy for mantle cell. Trials to date have been limited to small single-arm studies. Can you tell us a little bit about this and the outcomes and what you think it means for the future? Dr. Marc Braunstein: As a background, although BTK inhibitors such as ibrutinib have yet to be approved for newly diagnosed mantle cell lymphoma, acalabrutinib and zanubrutinib, which are second-generation BTK inhibitors, are FDA-approved for previously treated mantle cell lymphoma. Ibrutinib was withdrawn from the market. The lead author of this abstract, Dr. Michael Wang, had presented a late-breaking data from the phase 3 SYMPATICO trial at ASH last year, in which 267 patients with relapsed or refractory mantle cell lymphoma after one to five prior lines of therapy were randomized to receive the combination of ibrutinib plus the BCL-2 inhibitor venetoclax or ibrutinib plus placebo. That study showed there was a 32 versus 22-month progression-free survival with a hazard ratio of 0.65 at a median follow-up of 51 months, indicating the PFS benefit of the combination of ibrutinib and venetoclax compared to ibrutinib with placebo. So that leads us to this subgroup analysis in the current being presented at ASCO, in which they looked at a subgroup of patients with mantle cell lymphoma who are at very high risk for treatment failure and early relapse - those are patients who have a mutation in TP53, which again is high risk for treatment failure. This abstract examined an open-label cohort of 44 first-line patients, as well as 75 patients who were in the relapse/refractory cohort, and compared to patients who either did or did not have the P53 mutation. When we look at the progression-free survival outcomes, the median progression-free survival in the first-line cohort of patients who did not have a P53 mutation was not reached, whereas those with the P53 mutation had a median progression-free survival of 22 months, which is still meaningful but still less than those who did not have a P53 mutation. Which again is not entirely unexpected. But the overall response rate of the combination of ibrutinib and venetoclax was very high at 90%, and the median duration of response was about 21 months. Now comparing this to the relapse/refractory cohort, in those without a P53 mutation, the progression-free survival of the combination of ibrutinib and venetoclax was about 47 months versus those who don’t have the P53 mutation was about 21 months with an overall response rate of 80%. I think one takeaway looking at this comparison of the first-line and relapse/refractory setting is that patients seem to do very similar in terms of overall response rate and progression-free survival, whether they were in the first line or in the later lines of treatment if they had the P53 mutation, which says that the combination of ibrutinib and venetoclax is effective no matter which phase of the disease the patient might be in, indicating its overall activity and being strong. Dr. John Sweetenham: Yeah, I thought that was an interesting observation, actually, how similar the outcomes were in those two groups. Dr. Marc Braunstein: No, I agree. And I think although patients with TP53 mutations did comparatively worse than those without the mutation according to progression-free survival, overall response rate, or complete remission rates, they did seem to be similar whether a patient was in first-line or relapsed refractory if they were P53 mutant and were treated with this combination. So, I think we need further data in the first line, such as the data that's awaiting publication from the study, which is examining upfront ibrutinib. But certainly, BTK inhibitors have significant activity in either the first line or the relapse setting of mantle cell lymphoma. Dr. John Sweetenham: Great. Thanks, Marc. Let's wind up with one more abstract, and this is . It's a 7-year analysis of the so-called study. This was a study comparing the standard of care, ABVD, with the same regimen with bleomycin substituted by brentuximab vedotin for patients with previously untreated advanced-stage classical Hodgkin lymphoma. The study at the time it was originally reported, resulted in a significant practice change in the first-line therapy of Hodgkin’s lymphoma. We now have mature follow-up. What are your take-homes from this study? Dr. Marc Braunstein: The study has certainly been a practice-changing clinical trial where, as you said, brentuximab with the backbone of AVD was compared to ABVD, which was the prior standard. And this was examined in newly diagnosed patients with classical Hodgkin lymphoma who were at advanced-stage, stage 3 or 4. The publication, first of the progression-free survival, and more recently, in the in 2022, where we saw the 6-year overall survival was 94% with the brentuximab-containing arm versus 89% in the control arm, established the brentuximab AVD, or otherwise called AAVD, as the standard of care in advanced stage newly diagnosed classical Hodgkin lymphoma. The current is now reporting 7-year follow-up on about 1,300 randomized patients who were enrolled in this impressive study. Though at a median follow-up of 89 months now, the 7-year overall survival was quite similar, 94% versus 89%, again favoring the brentuximab-containing arm. In particular, this was driven by patients who had stage 4 disease or those patients who were aged less than 60 in subgroup analyses. So, what I take away from this abstract in the 7-year follow-up of the is that brentuximab with AVD remains the standard of care for previously untreated advanced-stage classical Hodgkin lymphoma. It is worth noting that the study that was presented at ASCO last year compared nivolumab with AVD compared to brentuximab AVD and did show a slight PFS advantage of 94% versus 86% with nivolumab AVD. Obviously, these were different studies with different patient populations enrolled, so we're really just cross-comparing different studies. But I think brentuximab AVD, given the survival benefit that is retained now at seven years in the current abstract, still remains the standard of care for advanced-stage classical Hodgkin lymphoma. The role of immune checkpoint inhibitors like nivolumab is making headway in terms of treating newly diagnosed patients as well. Dr. John Sweetenham: Yeah, thanks, Marc. I mean, one of the observations that I thought was of interest in this study was the outcome for patients who were PET-2 positive, when you compare AAVD and ABVD. It does seem as if even in those patients who are PET-2 positive, having had AAVD, they still apparently have a better outcome than those who received ABVD in that situation who were PET-2 positive. So, I think that's another interesting observation. I'm not quite sure what it means, except speaking to the overall superior efficacy of that regimen. Dr. Marc Braunstein: You make a great point, John, because it's worth noting that in , a PET scan was done after cycle 2, but the study was not PET-adapted. So even if you had a positive PET, you continued for the full six cycles of treatment. But PET-2 status is often used in various studies of Hodgkin lymphoma to guide whether to give additional cycles or escalate therapy. So, I think the benefit of presenting those subgroups is that even if you were PET-2...
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ASCO24: The Era of the ADCs in NSCLC
05/23/2024
ASCO24: The Era of the ADCs in NSCLC
Drs. Vamsi Velcheti and Nathan Pennell discuss key lung cancer abstracts from the 2024 ASCO Annual Meeting, including data from LUMINOSITY and ADAURA, novel therapies in KRASG12C-mutant advanced NSCLC, and the need for effective adjuvant therapies for patients with rare mutations. TRANSCRIPT Dr. Vamsi Velcheti: Hello, I am Dr. Vamsi Velcheti, your guest host for the ASCO Daily News Podcast today. I'm a professor of medicine and director of thoracic medical oncology at Perlmutter Cancer Center at NYU Langone Health. Today, I'm delighted to welcome Dr. Nathan Pennell, the co-director of the Cleveland Clinic Lung Cancer Program and vice chair of clinical research at the Taussig Cancer Center. Dr. Pennell is also the editor-in-chief of the ASCO Educational Book. Dr. Pennell is sharing his valuable insights today on key abstracts in lung cancer that will be presented at the 2024 ASCO Annual Meeting. You'll find our full disclosures in the transcript of the episode. Nate, it's great to have you here on the podcast. Thank you for being here. Dr. Nathan Pennell: Thanks, Vamsi, for inviting me. I'm always excited for the ASCO Annual Meeting, and we have a tremendous amount of exciting lung cancer abstracts. I know we're not going to discuss all of them on this podcast, but even exciting Plenary presentations coming up. Dr. Vamsi Velcheti: So, one of the abstracts that caught my attention was , the trial, which will be presenting the primary analysis at the meeting. So, there's a lot of buzz and excitement around ADCs. Can you comment on this abstract, Nate, and what are your thoughts on key takeaways from this abstract? Dr. Nathan Pennell: Absolutely, I agree. This is really an exciting new potential target for lung cancer. So historically, when we think about MET and lung cancer, we think about the MET exon 14 skipping mutations which are present in 3% or 4% of adenocarcinoma patients. And we have approved tyrosine kinase inhibitors, small molecule inhibitors that can be very effective for those. What we're talking about here is actually an antibody drug conjugate or ADC telisotuzumab vedotin, which is targeting the MET protein over expression in non-squamous EGFR wild type advanced non-small cell lung cancer. The was a single arm, phase 2 study of teliso, and first of all, I think we have to define the patient population. So, these were MET over expressing non-small cell lung cancer by immunohistochemical staining. So, it included both what they considered MET high expression and MET intermediate expression, both of which had to be 3+ IHC positive on 25% to 50% of cells in the intermediate and 50% or higher in the high expressing group. They were treated with the ADC and had pretty promising results, a response rate of 35% in the MET high group and 23% in the intermediate group. Duration of response at nine months and 7.2 months in those two groups, and the PFS was five and a half and six months. So I would say in a previously treated population, this was relatively promising and potentially defines a completely new and unique subgroup of biomarker defined patients. So, Vamsi, I'm curious, though, if this ends up moving forward to further development, what your thoughts are on adding yet another biomarker in non-small cell lung cancer? Dr. Vamsi Velcheti: Yeah, I think it's certainly exciting. I think for this population, we really don't have a lot of options beyond the second line, and even in the second line, docetaxels are low bar. So,I think having more options for our patients is certainly outcome development. And I think MET IHC is relatively easy to deploy in a clinical setting. I think we already test for MET PD-L1 IHC routinely, and now recently, as you know, HER2 IHC given approval for ADCs, HER2 ADCs there in that space. So, I think from a technical standpoint, I don't see a big barrier in terms of adding an additional IHC marker. And usually, the IHC testing is pretty quick. And I think if you have a therapeutic approval based on IHC positivity, I think certainly from an operational standpoint, it shouldn't be a very complicated issue. Dr. Nathan Pennell: Yeah, I agree. This is cheap. It's something that can be done everywhere in the world. And as you said, in addition to diagnostic IHC, we're already looking at PD-L1, and probably moving towards doing that for HER2. This is really wonderful that we're moving into kind of the era of the ADCs, which is opening up a whole new therapeutic group of options for patients. Dr. Vamsi Velcheti: So, the other abstract that caught my attention was like, the . This is the molecular residual disease MRD analysis from the ADAURA trial. The trial, as you all know, is the trial that led to the FDA approval of adjuvant use of osimertinib in patients with EGFR mutant stage 1B through 3A non-small cell lung cancer. And in this trial, osimertinib demonstrated significant improvements in DFS and OS. And in this particular study, , the authors looked at the role of MRD in predicting DFS in the study. And after 682 patients who were randomized, 36% of the patients had samples to look at MRD post- surgery. And in the trial the MRD status predicted DFS or event free survival at 36 months with a hazard ratio of 0.23. And the MRD status had a median lead time of 4.7 months across both the arms, both osimertinib and the placebo arm. So, suggesting that MRD could potentially identify high risk subgroups of patients post-surgery to tailor personalized approaches potentially in this population. So, Nate, in your practice, of course, we don't have a clinically validated approach yet to kind of use MRD in this setting, but if we have an option to use an MRD based assay, do you think that would potentially be an opportunity to perhaps escalate or de-escalate adjuvant strategies with TKIs in the adjuvant setting? Do you see value in using MRI assays post- surgery? Dr. Nathan Pennell: Yeah, I think this is a really important study because this is such an important topic around adjuvant targeted treatment. So, of course, ADAURA really changed how we treated people with EGFR mutant lung cancer who underwent surgical resection, because we know that the three years of osimertinib significantly improved disease-free survival and overall survival. But there's still a lot of questions being asked about, is that affordable? Obviously, we're putting a lot of resources into three years of treatment, and not everyone necessarily needs it. There may well be people who are cured with surgery alone and adjuvant chemotherapy. And then what about duration? Is three years enough? Do we need even longer treatment, or do we need shorter treatment? And up to date, we haven't really been able to tell people at risk of recurrence other than the pure odds-based risk based on their stage. And the assay that was used in the ADAURA study was a personalized tumor informed assay based on the resected tumor. It's unclear to me whether this was just a subgroup of people that had this done or whether they tried to do it in all 600 patients and only, it looks like they were successful in about 32% of people. Maybe about a third were able to successfully have a tumor informed assay. So, the first question is, “Can you use this to help guide who needs treatment or not?” And I think what they showed was only about 4% of people in osimertinib arm in 12% had MRD positive at baseline after surgery. So probably, upfront testing is not really going to be all that helpful at determining who's at high risk and needs to be treated. Interestingly, of those who were positive, though, most of them, or 80% of them, did go MRD negative on osimertinib. And what I found really interesting is that of those who did have a recurrence, 65% of them did have the MRD test turn positive. And as you mentioned, that was about five months prior to being picked up radiographically, and so you can pick them up sooner. And it also looks like about two thirds of recurrences can be identified with the blood test. So that potentially could identify people who are recurring earlier that might be eligible for a more intensive treatment. The other thing that was really interesting is of those who recurred in the osimertinib arm, 68% of them happened after stopping the osimertinib, suggesting that for the majority of patients, even those not necessarily cured, they seem to have disease control while on the osimertinib, suggesting that maybe a longer duration of treatment for those patients could be helpful. The problem is it still isn't necessarily helpful at identifying who those people are who need the longer duration of treatment. So, definitely an important . I think it could be useful in practice if this was available clinically, especially at monitoring those after completion of treatment. I think as the sensitivity of these MRD assays gets better, these will become more and more important. Dr. Vamsi Velcheti: I think it's a little bit of a challenge in terms of standardizing these assays, and they're like multiple assays, which are currently commercially available. And I think the field is getting really complicated in terms of how you incorporate different assays and different therapeutics in the adjuvant space, especially if you're kind of looking at de-escalating immunotherapeutic strategies at the adjuvant setting, I think, makes it even more challenging. I think exciting times. We definitely need more thoughtful and better studies to really define the role of MRD in the adjuvant space. So, I guess more to come in this space. Dr. Nathan Pennell: Vamsi, I wanted to ask you about another really interesting . This is a subgroup of the perioperative study for early-stage resected non-small cell lung cancer. This is specifically looking at baseline N2 lymph node involvement in stage 2A-3B with N2 positive patients in an exploratory subgroup analysis. What are your key takeaways from the study? Dr. Vamsi Velcheti: I felt this was a very interesting abstract for a couple of reasons. As you know, this is the AEGEAN trial, the phase 3 trial that was reported earlier last year. This is a perioperative study of durvalumab plus new adjuvant chemotherapy versus new adjuvant chemotherapy alone and adjuvant durvalumab plus placebo. The study obviously met its primary endpoint, as we all saw, like the event-free survival. And here in this , the authors present an exploratory subgroup analysis of patients who had N2 lymph node involvement prior to study enrollment. So, in this study, they were focusing on perioperative outcomes. And one of the issues that has come up multiple times, as you know, in a lot of these preoperative studies, is the impact of neoadjuvant chemo immunotherapy on surgery or surgical outcomes. And consistently, across a lot of these trials, including the , about 20% of patients don't end up making it to surgery. So in that light, I think this study and the findings are very interesting. In this , they looked at patients who had N2 nodal involvement and of the patients with N2 nodal involvement, the surgical operability or the number of patients who completed surgery was similar in both the groups. So, there was no significant difference between patients who received durva versus chemotherapy and also among patients who had N2 subgroup who had surgery, similar proportions of durvalumab and placebo arms had open versus minimally invasive versus pneumonectomy. So durvalumab didn't have a negative impact on the type of surgery that the patients had at the time of surgery. So overall, the findings were consistent with other trials, perioperative trials that we have seen. So, the surgical outcomes were not negatively impacted by adding immunotherapy in the neoadjuvant perioperative space. So, this is consistent with other trials that we have seen. And also, the other issue, Nate, I'd like to get your opinion on is, across the board, in all the perioperative trials we have seen that about 20% of the patients actually don't end up making it a surgery. And of course, most of these perioperative trials, a lot of these patients are stage 3 patients. And my take on this was that there’s probably a little bit of a patient selection issue. We generally tend to err on the side of operability when we have a stage 3 patient discussed in the tumor board, sometimes feel like the patient may downstage and could potentially go to surgery. But even in the real world, in stage 3 operable patients, what proportion of patients do you think don't end up going to surgery? Dr. Nathan Pennell: That is such an important question that I don't think we have the best answer to. You're right. All of these perioperative studies have a relatively high- sort of 20% to 30% of people who enroll on the studies don't necessarily go to surgery. And I don't think that they've done as great a job as they could in all of these trials describing exactly what happens to these patients. So in the real world, obviously not everyone would be fit enough to go to surgery or might progress in the time between when they were diagnosed and the time as planned for surgery. But probably more of them would go to surgery if they weren't getting neoadjuvant treatment, because that would be their initial treatment. The question is, of course, is that the right choice? If someone gets 12 weeks or nine weeks of neoadjuvant treatment and then a restaging scan shows that they've had progression with metastatic disease, are those really the people that would have been optimally treated with surgery upfront, or would they just have had recurrence on their first postoperative scan? So, it's really an important question to answer. I think the bigger one is, is the treatment preventing them through toxicity from going to treatment? And I think the studies have generally felt that few patients are missing out on the option of surgery because of toxicity being caused by the IO. And in the AEGEAN study, for example, in this subgroup, a slightly numerically higher percentage of patients in the durvalumab arm actually underwent surgery compared to those who got neoadjuvant chemo. So, it doesn't seem like we're necessarily harming people with the neoadjuvant treatment. But I know that this is a concern for patients and doctors who are undergoing this approach. Dr. Vamsi Velcheti: Definitely, I think having multiple data sets from perioperative trials, looking at the relative impact of IO on the safety and the nature of the surgery is going to be important, and this is a very important study for that reason. Dr. Nathan Pennell: Can I ask you another thing that I thought really interesting about this particular one is they looked at the difference between those with single station N2 and multi station N2. And I know this is one of those, should we be operating on people who have multi station N2 disease? And the AEGEAN study did include people who had multiple N2 stations where perhaps in the pre-IO era, these would have been treated with definitive chemoradiation and not surgery at all. But the disease-free survival hazard ratio was essentially the same for multi station N2 as it was in the overall population. So, has that changed the way we're approaching these patients in these multidisciplinary discussions? Dr. Vamsi Velcheti: Absolutely, Nate. I think surgical operability is in the eye of the beholder. I think it depends on which surgeon sees the patient or how the discussion goes in the tumor boards, as you know. Certainly, I think with this optionality of having a chemo IO option and potential for downstaging, kind of pushes, at least in our practice, more of these patients who are multistation, who would have otherwise gone down the chemoradiation route are now actually going through neo adjuvant chemo IO and with the hope that they would make it to surgery. So, I think it's an interesting change in paradigm in managing our locally advanced patients. So, I think it's certainly interesting, but I guess to your point, there clearly are some patients who probably should just have chemoradiation upfront, and we may be kind of like delaying that definitive chemoradiation approach for at least a subset of patients. So, at the end of the day, I think it's a lot of clinical decision-making and I think there's going to be a little bit of art to managing these patients and it's going to be really hard to define that population for a clinical trial. Dr. Nathan Pennell: Yeah, clearly, multidisciplinary discussion, still very important for earliest age non-small cell lung cancer patients. If we move back to metastatic lung cancer, let's talk about looking at one of our newer, exciting biomarkers, which are the KRASG12Cmutant non-small cell lung cancer. So this is a study of a second generation KRASG12Cinhibitor, olomorasib, which was combined with pembrolizumab, the anti PD-1 antibody, in patients with advanced KRASG12C mutant non-small cell lung cancer. This is something that has been tried before with first generation G12C inhibitors, with some concerns about how safe it was to do that. So, Vamsi, what did you learn from this abstract? Dr. Vamsi Velcheti: Definitely, I think one of the concerns that we've had in other trials is like the cumulative toxicity of adding checkpoint inhibition to G12C inhibitors, especially the sotorasib trial, where we see increased rates of grade 3, 4 transaminitis. So, it is encouraging to see that some of the newer agents have less of those issues when it comes to combining the checkpoint inhibition. So especially with KRASG12C, as you know, these are patients who are smokers, and often these are patients who have high PDL-1 could potentially also benefit from immunotherapy. In order for these KRASG12C inhibitors, in order to move these targeted therapy options for these patients to the front line, I do think we need to have substantial comfort in combining the checkpoint inhibitors, which is a standard treatment approach for patients in the frontline setting. I think this is exciting, and I think they're also like, as you know, there are other KRASG12C inhibitors also looking to combine with checkpoint inhibition in the frontline settings. So, we'll have to kind of wait and see how the other agents will perform in the setting. Dr. Nathan Pennell: Yeah, I completely agree. I think this is such an important area to explore specifically because unlike our other targeted oncogenes like EGFR and ALK, we have multiple options for these patients, both immunotherapy and targeted treatments. And if we could think about sequencing them or even combining them and if it could be done safely, I think that would be well worth investigating. There still was significant toxicity in this trial; 30% of people had diarrhea, even at the reduced dose, and there was transaminitis at sort of about 20% or so, although probably at a manageable level. But the response rate was really quite promising. And these are all previously IO and mostly G12C TKI pre-treated patients still had a response rate of 63%. And in those who were naive to IO and TKIs, it was 78% response rate. So, if it could be done safely, I think it's definitely worth pursuing this in further trials. Dr. Vamsi Velcheti: And also, there's some data, preclinical data, like looking at G12C inhibition. And also we have known with MET inhibition for a long time that it could potentially augment immune responses and could be having some synergistic effect with IO. So, we'll have to wait and see, I think. But safety is really the top in mind when it comes to combining these agents with checkpoint inhibitors. So, it's really encouraging to see that some of the newer agents may be more combinable IO. Now moving on to the next abstract, and moving on to, again, the early-stage setting. So, from our colleagues...
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