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