The inability of patients to perform daily tasks after joint replacement remains a significant challenge as well as a burden on health systems because these poor results often require additional treatment (e.g. rehabilitation) and re-replacement. This challenge can be addressed by surgeons using individual patient characteristics to personalize how they perform joint replacement surgery. However, many surgeons perform too few procedures to effectively personalize their plans and thus technologies are needed to provide assistance.
The goal of this research is to develop an improved understanding of how patient specific factors affect the results of joint replacement as well as to develop technologies that can collect data about each patient’s individual characteristics and use these data to assist surgeons in optimally planning each surgery. This will be achieved by a combination of computer-based biomechanical research, statistical modelling, and novel sensor development. This work will improve our understanding of personalized joint replacement, yield new clinical technologies, enable surgeons to more effectively personalize surgery, result in improved patient function, and improve the health systems in BC and beyond.
Female reproductive decline (indicated by rising rates of infertility, birth defects, and miscarriage) is an early sign of aging, and is largely due to deteriorating quality of oocytes, or egg cells. Identifying the signaling pathways and mechanisms that control oocyte quality and reproductive decline is essential for better addressing female reproductive health issues, and can also provide key insights into other aspects of aging.
Our research focuses on the ties between nutrients, reproduction, and aging. In organisms ranging from worms to humans, signaling pathways that detect nutrients — such as the insulin signaling pathway — seem to play crucial roles in coordinating metabolism, reproduction, and lifespan. We will use a mouse model of genetically reduced insulin to determine how lowering insulin affects oocyte quality and reproductive success during aging. We will also study how insulin levels determine features of polycystic ovary syndrome, a common hormonal disorder, and evaluate long-term consequences of temporary nutrient excess or depletion.
We anticipate that this research will inform effective strategies to better manage female reproductive health, as well as to improve health during aging.
Proper myelination allows for the fast, efficient transmission of nerve impulses which is important for the coordination of movement, integration sensory information and cognition functions. In the brain, oligodendrocytes are the cells that extend numerous processes that wrap nerve cell (neuron) processes in a compact myelin sheath.
The overarching goal of my research program is to delineate the cellular mechanisms that underlie myelination across an organism’s lifespan. Several interconnected research projects investigate different aspects of how myelination occurs in the brain, such as the regulation of gene expression in oligodendrocytes, the cellular communication between oligodendrocytes and neurons, and the impact of environmental factors. These projects use animal models to investigate these biological questions at the molecular level (e.g. DNA, RNA, proteins and lipids). New insights into how these molecules interact to regulate myelination has broader implications for brain development, aging and pathology. This will ultimately lead to better health outcomes for persons living with neurological disorders.
More than 20 percent of candidates on the kidney transplant waitlist are considered difficult-to-match for the already scarce resource of kidne y organs. This is because their immune system has previously been activated through pregnancy, blood transfusion, or prior organ transplants to produce a broad range of antibodies that limit their chances of finding compatible donors. These “highly sensitized” patients (HSP) face prolonged wait-times, reduced access to transplant, and an increased risk of death on the waitlist.
The main objective of this research is to implement a first-of-its-kind Willing to Cross (WTC) program. Under this national initiative, patients will be able to be transplanted across known antibodies against donors that are deemed to be at low risk of causing rejection. This strategy is anticipated to improve the chances of receiving a transplant while maintaining good patient outcomes. In addition, the study will follow patients with two cutting-edge immune assays that have been shown to detect rejection before kidney injury occurs. Recognizing that we serve a diverse patient community with different values and beliefs, we will also evaluate patient perception and readiness to adopt this new kidney allocation system.
Neurodevelopmental and fertility disorders represent significant health burdens in Canada, as approximately 1 in 66 Canadian youth are diagnosed with an autism spectrum disorder, and 1 in 6 Canadian couples experience infertility. Neurons and reproductive cells (oocytes and sperm) rely extensively on a form of control of gene expression called translational control. Mutations in the translational regulatory gene Fmr1 underlie the fragile X disorders known as fragile X syndrome (FXS) and fragile X primary ovarian insufficiency (FXPOI), which are leading causes of autism and premature ovarian failure respectively.
The proposed research will build upon my recent discoveries of Fmr1’s role in promoting the translation of genes encoding large proteins — many of which are associated with autism — in order to understand the mechanism by which Fmr1 activates translation. Knowledge of this mechanism will be of immense clinical value, enabling the development of novel therapies for citizens of British Columbia experiencing a fragile X disorder or related autism spectrum or infertility disorder.
In Canada, approximately 7,600 adolescents and young adults (AYAs) aged 15 to 39 are diagnosed with cancer each year, representing 4 percent of annual cancer diagnoses. Currently, cancer care systems have limited capacity to meet the complex needs of AYAs and survival outcomes for AYAs are often worse when compared to children and adults over 40.
This research program will use the principles of participatory action research (PAR) and patient-oriented research (POR) to meaningfully engage AYAs and cancer care allies (healthcare professionals, decision makers, researchers, and community organizations) to better understand AYA cancer care and explore how cancer care systems can respond to the unique, complex needs of AYAs with cancer. Led by a researcher with lived experience of cancer as an AYA and 15 years of experience conducting PAR, the work seeks to inform AYA cancer care research, policy, and practice in BC and beyond. Initial research funding from the Vancouver Foundation, MSFHR, and British Academy is in place, as are collaborators from Royal Roads University, BC Cancer, BC Ministry of Health, Young Adult Cancer Canada, the BC SUPPORT Unit, Callanish Society, InspireHealth, Innovation Support Unit, and AYAs with cancer.
Obesity is one of many chronic conditions that are rising in Canada, with heart disease as the top killer for women. Social inequalities exist in these conditions, but few studies focus on the social causes of obesity in women versus men, or on how social causes reinforce each other.
My research program aims to fill these knowledge gaps so that interventions to prevent and manage chronic conditions can be better designed and more effective. One of my projects is focused on co-developing novel ways to promote heart health among Indigenous women because of the profound burden of CVD in one of Canada’s most marginalised group. A key program goal is to produce strong research evidence to inform public health strategies and interventions for preventive action on obesity, and to build capacity of the next generation of researchers and healthcare providers to further improve health and health equity in Canada, especially BC.
In many resource-limited countries, children who suffer from severe illness are at a high risk of dying in the six months after leaving the hospital. Most caregivers are unaware of this, although simple strategies like follow-up visits and healthy practices at home can improve survival. Our team has developed a tool that allows healthcare workers to identify children who are most at risk of dying after leaving the hospital. Healthcare workers can use this tool to identify the highest-risk children and plan follow-up visits, reducing the burden on families and the health system. The caregivers of all discharged children receive education on healthy practices and on the signs that their child needs follow-up care. In Uganda, our approach has saved the lives of children aged six months to five years old.
Here, we will confirm that this same approach can be used in a wider population. We will talk to families and healthcare workers to determine how best use this approach in different age groups and locations. We will work closely with our Ugandan partners to ensure improvements are long-lasting. Ultimately, we plan to work with our local partners to apply our approach and improve child health in remote communities across BC.
T cells patrol the body using their T cell receptors (TCR) to look for cells which display evidence of intracellular pathogens or cancers. In order to focus their attention on specific cancer antigens, T cells can be engineered to express an artificial recognition receptor (termed a Chimeric Antigen Receptor or CAR). CAR technology has been shown to be extremely powerful clinically in leukaemia and lymphoma patients who have not responded to other lines of therapy, leading to recent FDA and Health Canada approvals.
However, only one third of lymphoma patients treated with CD19 specific CAR T cells exhibit long lasting curative responses, thus leaving significant room for improvement. CAR T failure can usually be attributed to either loss of the tumour antigen (ie CD19) or to dysfunction of the T cells, and we are developing a strategy to address the latter. Once T cells express a CAR, they can still receive signals through their TCR, and we have shown in preliminary experiments that this type of stimulation can help CAR T cells to proliferate and kill tumour cells. Our research will use oncolytic cancer killing viruses, and other vaccines, to help mobilize CAR T cells which recognize viral antigens using their TCR.
Every week, at least 500,000 Canadian employees are unable to work due to poor mental health, costing employers upwards of $6 billion in lost productivity. In healthcare, poor employee mental health leads to patient suffering and death and severe rates of staff absenteeism and turnover. Nurses, who constitute the largest human resource in healthcare, experience a disproportionately high rate of depression and posttraumatic stress disorder, and these conditions severely impact patient outcomes. COVID-19 has exacerbated the already numerous workplace risk factors that nurses face, with especially damaging impacts in the long-term care sector (LTC).
COVID-19 has had a devastating impact on workplace psychological health and safety for nurses across healthcare contexts, and especially in LTC. My research responds to this urgent need to improve the quality and safety of resident care provision by improving the workplace conditions for nurses in LTC, driving better systems and patient outcomes. I will work with new and existing partners to identify, implement, and evaluate best practices and policies in this sector. This research will have vast implications for scholarship, policy, and the success of healthcare ecosystems in Canada.
