To test this, we conducted Western Blot analysis for activation (cleavage) of caspases in U87, U373, LN229 GBM cells and GS9-6 stem cell-like glioma cells in response to increasing dosages of TRAIL and Olaparib or the combination of both (Fig. 2A–D). The gene discussed is TNFSF10; the disease is central nervous system cancer.