Glioblastoma multiforme is an aggressive brain cancer of which there are currently no effective treatment options. Glioblastoma cells have very rapid mutation rates and the tumour itself is comprised of a mix of different cells with differing capabilities of driving tumour recurrence. Research has shown that only a small population of cells (called Brain Tumourliniating Cells; BTICs) within the tumour are the most deadly, but these cells are also insensitive to available therapies. The Porter Lab has found a protein, called Spy1, that is important in the expansion of the BTIC population. Spy1 is highly expressed in patients with glioblastoma, and early pre-clinical data suggests that targeting its mechanism may make an exciting therapy for these patients. This project will test the potential of targeting Spy1 for treatment of this aggressive form of cancer.