“The cannabinoid receptor gene 1 (CNR1) encodes the human cannabinoid receptor CB1.
This receptor has a widespread distribution in the central nervous system (CNS), the main ligands being anandamide, 2-araquidonoil glycerol and marijuana constituents.
There is evidence to suggest an anti-neoplastic effect of these ligands in glial tissues mediated through stimulation of the receptor.
Our results suggest that allele G of the CNR1 gene could be associated with a lower susceptibility to glioma.”
http://www.ncbi.nlm.nih.gov/pubmed/21156413
“A glioma is a primary brain tumor that originates from the supportive cells of the brain, called glial cells.” http://neurosurgery.ucla.edu/body.cfm?id=159
“Remarkably, cannabinoids kill glioma cells selectively and can protect non-transformed glial cells from death.” http://www.ncbi.nlm.nih.gov/pubmed/15275820
“Cannabinoids, the active components of Cannabis sativa…” http://www.ncbi.nlm.nih.gov/pubmed/17952650