Dr. Oleg Dmitriev on Copper, Platinum and Safer Chemotherapy
Release Date: 11/13/2022
Not Just Numbers: Vaidehee Lanke Tracks Opiate Use & Perinatal Health
Researchers Under the Scope
In this episode, medical student and researcher shares what large provincial datasets reveal about opioid use disorder, maternal mental health, and pregnancy. Armed with data, she hopes better support —before, during, and after birth—can change outcomes for mothers and babies. Lanke spent her summer working with epidemiologist and the Saskatchewan Population Health and Evaluation Research Unit on a pan-Canadian project tracking opioid use in perinatal populations across five provinces. “The question we set out to answer was: What is the association between...
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Cross-Linked Clues: Jack Walther on Depression and Alzheimer's
Researchers Under the Scope
As a student, Jack Walther's friends often came to him when they needed a listening ear, or help with relationship struggles. This summer, Walther took his fascination with the brain and mood disorders to , learning to untangle some of the tiny molecular threads that might explain why depression so often shows up alongside dementia. Walther and the research team dug into the physical interactions between serotonin and the beta amyloid peptides that build up in patients with Alzheimer's disease. . He admits going from the classroom to the laboratory felt like a sharp learning curve. "It was...
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EEEV-ident Passion: Eve Simpson on Doubt, Persistence and Viral Spread
Researchers Under the Scope
Eve Simpson knows from experience scientific research doesn’t always follow a linear path. In the first of three student research episodes, the fourth-year biochemistry, microbiology and immunology student looks back at a summer spent decoding Eastern Equine Encephalitis Virus (EEEV) in ’s lab. Simpson said she loved doing bench research, but felt frustrated in the moments where she hit setbacks and moments of doubt. “I felt like I was letting everyone down,” she said. “But everyone I spoke to said they'd been through that. It's part of being a researcher. That's what drives us to do...
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That’s So Metal: Dr. Jessica Sheldon Targets Acinetobacter Baumannii
Researchers Under the Scope
Jessica Sheldon (PhD) is on a mission to starve out Acinetobacter baumannii —one of the world’s most virulent hospital-borne pathogens. Notorious for its speedy evolution and multi-drug resistance, the hospital-borne bacteria lingers on dry surfaces and infects critically-ill patients, leading to sepsis, pneumonia and high mortality rates. In this episode, delves into the real-life events that drove her to investigate histamine, and its role in bacterial survival and immune response. In 2022, Sheldon joined the University of Saskatchewan’s College of Medicine as an assistant professor...
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Fluid Endeavour: Kirk Haan's Medical Balancing Act
Researchers Under the Scope
Kirk Haan graduated from high school, thinking he’d study pharmacy at the University of Saskatchewan, and walk out five years later. After one summer at a pharmacy, Haan realized he was after a more ‘hands-on’ career in medicine. “I’ve kind of worked with my hands my whole life, just between rummaging around on a farm and always kind of building things,” he said. “Now it’s using them to help people in a direct way.” Then, Haan found his passion — inside the laboratory. In 2018, Haan landed a summer position in , studying osmoregulation — the mechanisms that govern...
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Dr. Sébastien Gauvrit: Fishing for Answers in Vascular Development
Researchers Under the Scope
Sébastien Gauvrit (PhD) was only ten when his family let him have his first tank of guppies. Within weeks, he was hooked. “I actually had to understand genetics directly by mixing these different fish together to get the colour or fin shape I was interested in,” said the vascular biologist and genetic modelling pioneer. From his home in France, to post-doctoral work pioneering new models for vascular disease in Germany, to his current position as an assistant professor of Anatomy, Physiology and Pharmacology at the University of Saskatchewan’s College of Medicine — tropical fish...
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Dr. Stu Skinner & Mobile Medicine: Halting Syphilis & HIV
Researchers Under the Scope
Stuart Skinner (MD) knew something was wrong three years ago, when patients started coming to him with vision loss, fever, rashes, and meningitis. Almost every case could be traced back to untreated syphilis — a sexually transmitted infection with caseloads exploding 1,200 per cent from 2017. Saskatchewan saw this spike just as Covid-19 entered the picture. “With the pandemic, testing dropped dramatically,” Skinner said, noting this , often travelling alongside HIV. Syphilis often spreads through sores, and can remain unnoticed for months or years on end, making early detection...
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Peptide Puzzle: Dr. Yi-Chun Chen on Early Markers for Diabetes and Obesity
Researchers Under the Scope
Yi-Chun Chen (PhD) is taking a close-up look at some of the body’s hardest-working cells — the ones often processing an overabundance of modern-day food and nutrients. “From an evolutionary point of view, our cells are not designed to deal with that,” said Chen, who joined the department of Anatomy, Physiology, and Pharmacology at the University of Saskatchewan last year as an assistant professor. She said our bodies are pushed into churning out large amounts of insulin rapidly after snacks and meals, “which makes the beta cells work extra hard.” Raised in Taiwan and inspired by...
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In the Trenches: Dr. James Stempien on Emergency Medicine
Researchers Under the Scope
James Stempien (MD) has navigated some of the most challenging corners of emergency medicine, from the frigid isolation of Inuvik to the bustling corridors of Saskatoon’s emergency departments. His experience in low-tech outposts has shaped his approach to modern emergency care. “When things aren’t going well you see it in the emergency department first,” Stempien said. “We’re the front door. We’re always open.” As provincial department head of emergency medicine, Stempien sees patients on their worst days in hospitals bursting at the seams, struggling to...
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All’s Not Lost: A Roadmap to Treating Hepatitis C on the Prairies
Researchers Under the Scope
As the world aims to eradicate hepatitis C (HCV) by 2030, Carrielynn Lund and Dr. Alexandra King’s team created a how-to guide. is a step-by-step guide to tackling a spike of new infections across the three Canadian prairie provinces. Hepatitis C (HCV) causes severe liver disease, and was notoriously difficult to treat until the introduction of direct-acting antivirals a decade ago — antivirals which boast a remarkable 95% success rate. Despite this advancement, Lund and Dr. King say Saskatchewan, Alberta and Manitoba need to know why HCV cases keep rising, particularly in...
info_outlineColour-changing reactions and small explosions punctuated life at Dr. Oleg Dmitriev's home, when he was a boy. He loved trying out chemical reactions, and experimenting. As a teenager, he was fascinated by the science fiction novels his father brought home.
"It's all about strange worlds and unusual, strange forms of life," said Dmitriev, a protein biochemist. "I started wondering, why is the life on our planet is the way it is? And what is the chemistry of life?"
After earning his PhD at Moscow State University, Dmitriev went on to post-doctoral studies at the University of Osnabrück, followed by years of bench research at the University of Wisconsin. That's where he discovered the potential of nuclear magnetic resonance spectroscopy-- something he uses today to piece together the way copper moves through human cells.
"It still fascinates me," said Dmitriev, who moved to the University of Saskatchewan in 2005 to open his own laboratory. "It's a very, very important technical component of my research."
Today, as a professor of Biochemistry, Microbiology and Immunology at the U of S College of Medicine, Dmitriev has honed in on ATP7B, the protein that transports and regulates copper in human tissuess.
"Copper is a very important bioelement that is needed for supplying our cells with energy, but at the same time it also has a dark side," Dmitriev said. "If it escapes, it can start a cascade of damaging runaway reactions."
The Canadian Liver Foundation estimates one in 30,000 Canadians inherit a defective version of the protein, causing Wilson Disease. Without treatment, they suffer liver damage and a host of neurological symptoms from an over-accumulation of copper.
"There are many entry points for copper," said Dmitriev. "Where does it go from the point where it enters the protein? How does it go across the cell membrane? How is that activity regulated?"
Together with Dr. Scott O'Leary, a cell biologist, Dmitriev was successful in securing a $761,176 grant from the Canadian Institutes of Health Research in 2021 to explore those questions. He said understanding the 'cogs and wheels' of copper transport in the body may also help clarify the way other metals, such as platinum, move through human tissue.
Platinum compounds are frequently used in chemotherapy treatments for breast, colon, lung, and ovarian cancer.
"They're quite effective, but they're incredibly toxic," said Dmitriev. "They have a lot of really serious side effects."
Because platinum uses the same transportation mechanisms as copper, Dmitriev wants to know how to make its journey through the body less harmful.
"Can we manipulate those transfer pathways to make sure that platinum chemotherapy drugs get to their target, but do not go astray and poison the patient?" he said.
Looking back, Dmitriev said he's glad he landed at the University of Saskatchewan, as it gave him the chance to explore the areas he feels most passionate about.
"I would do it all over," he said. "Science is fun. Science is exciting. It's a good life."