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