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Review

Nature Reviews Neuroscience 4, 873–884 (1 November 2003) | doi:10.1038/nrn1247

The molecular logic of endocannabinoid signalling

Daniele Piomelli

The endocannabinoids are a family of lipid messengers that engage the cell surface receptors that are targeted by |[Delta]|9-tetrahydrocannabinol, the active principle in marijuana (Cannabis). They are made on demand through cleavage of membrane precursors and are involved in various short-range signalling processes. In the brain, they combine with CB1 cannabinoid receptors on axon terminals to regulate ion channel activity and neurotransmitter release. Their ability to modulate synaptic efficacy has a wide range of functional consequences and provides unique therapeutic possibilities.