Normal tissue toxicity limits the efficacy of current treatment modalities for glioblastoma multiforme (GBM). We evaluated the influence of cannabinoids on cell proliferation, death, and morphology of human GBM cell lines and in primary human glial cultures, the normal cells from which GBM tumors arise. The influence of a plant derived cannabinoid agonist, D9 -tetrahydrocannabinol (D9 -THC), and a potent synthetic cannabinoid agonist, WIN 55,212- 2, were compared using time lapse microscopy. We discovered that D9 -THC decreases cell proliferation and increases cell death of human GBM cells more rapidly than WIN 55,212-2. D9 -THC was also more potent at inhibiting the proliferation of...
