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Role of endocannabinoids in 5-HT2 receptor-mediated effects
William M Connelly1, Matthew J Baggott
1Department of Pharmacology and Toxicology, Otago School of Medical Sciences, University of Otago, P.O. Box 913, Dunedin, New Zealand. bill.connelly@otago.ac.nz
Abstract:
Endocannabinoids are lipid retrograde messengers that can be released by postsynaptic depolarization and/or activation of certain metabotropic receptors. We review a recent report that activation of metabotropic 5-HT2 receptors by endogenous serotonin induces the release of endocannabinoids in the olivary nucleus and suppresses glutamatergic input through a presynaptic action. This serotonin-endocannabinoid interaction has implications in the pathophysiology of pain and mental illness and raises the possibility that drugs targeting the 5-HT2 receptor may act by modulating endocannabinoid release.
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