tumor CBGA Anandamide cells Pain GPR55 Metabolic Disorders TRPV1 nervous system CBDV THCV GPR119 TRPV2 Cannabinoid Receptors CB2 substantia nigra TRPV3 microglia stem hippocampus Immune Disorders PPARα memory Brain CBG Plant Cannabinoids CBN OEA thalamus CB1 Other Disorders & Therapeutic Uses CBD THC cerebellum immune system 2AG NarGly NADA CBDA TRPV4 anti-inflammatory pancreas Diseases TRPA1 putamen Brain Disorders Terpenes appetite THCA PEA CBC TRPM8 Δ9THC Synthesizing & Degrading Enzymes Anandamid 9THC Endocannabinoids hippocampal Cancer PPARγ