In my lab at the University of Windsor, my team has been investigating the role of the Spy1 (Speedy) protein, a cell-cycle regulator, in aggressive brain cancers like glioblastoma, one of the most aggressive and difficult-to-treat brain cancers. Our recent work has provided new insights into how Spy1 affects neural stem cells, which are critical for brain repair and regeneration, and how this relates to cancer progression.
Spy1’s Impact on Neural Stem Cells
Neural stem cells are essential for memory, learning, and the brain’s ability to heal itself. As we age, the number of active stem cells in the brain naturally decreases, which impairs its regenerative capabilities. Spy1 has been shown to play a key role in neurogenesis by activating these stem cells, potentially aiding in brain repair.
However, we discovered that too much Spy1 causes problems. In our studies, we genetically engineered mice to overexpress Spy1 specifically in their neural stem cells. While this activation increased the number of stem cells, it also caused them to divide uncontrollably, which made them more susceptible to becoming cancerous. This was a critical finding, as it sheds light on how glioblastoma cells might develop from stem cells that have gone awry due to Spy1 overexpression.
Learning Deficits and Aging
Our research also revealed some unexpected consequences. Initially, we thought increasing neural stem cell populations might improve learning and memory. Despite the increased number of stem cells, the mice showed learning deficits. This shows that simply increasing stem cells doesn’t always improve brain function. In fact, it may even disrupt other important brain cells, leading to cognitive issues.
In addition to its role in cancer, Spy1 also appears to influence brain aging. We found that increasing Spy1 levels in mice helped maintain neural stem cell populations longer than in normal aging, which could have implications for treating neurodegenerative diseases like Alzheimer’s. However, this too must be carefully controlled, as promoting stem cell expansion without understanding the full implications can have unintended side effects.
A Path to Better Treatments
Our findings suggest that targeting Spy1 could offer a new approach to treating brain cancers such as glioblastoma. By carefully controlling Spy1 levels, we might be able to enhance brain repair without triggering excessive cell division that can lead to cancer. The challenge now is to figure out how to selectively target Spy1’s activity in a way that benefits brain health without promoting tumour growth.
A Collaborative Effort
This research has been a collective effort, and I’m grateful for the talented team that continues to work alongside me. In addition to my work at the University of Windsor, I’ve had the privilege of contributing to cancer and health research in different roles throughout my career, including formerly serving as the founding Executive Director of WE-SPARK Health Institute, a collaborative network of researchers, clinicians, and community partners across the Windsor-Essex region.
My work has also been supported by national research organizations, including the Canadian Institutes of Health Research (CIHR), and I serve on the board of Research Canada, where I advocate for advancing cancer and health research across the country.
Looking Ahead
The findings from our research are just the beginning. By continuing to study the balance between Spy1, neural stem cells, and cancer progression, we hope to develop targeted treatments for glioblastoma and find ways to improve brain health as we age. These efforts represent an exciting step toward a better understanding of cancer and more effective treatments for complex brain diseases.