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Serotonin 2C receptor activates a distinct population of arcuate pro-opiomelanocortin neurons via TRPC channels.

ABSTRACT: Serotonin 2C receptors (5-HT(2C)Rs) expressed by pro-opiomelanocortin (POMC) neurons of hypothalamic arcuate nucleus regulate food intake, energy homeostasis and glucose metabolism. However, the cellular mechanisms underlying the effects of 5-HT to regulate POMC neuronal activity via 5-HT(2C)Rs have not yet been identified. In the present study, we found the putative transient receptor potential C (TRPC) channels mediate the activation of a subpopulation of POMC neurons by mCPP (a 5-HT(2C)R agonist). Interestingly, mCPP-activated POMC neurons were found to be a distinct population from those activated by leptin. Together, our data suggest that 5-HT(2C)R and leptin receptors are expressed by distinct subpopulations of arcuate POMC neurons and that both 5-HT and leptin exert their actions in POMC neurons via TRPC channels.

SUBMITTER: Sohn JW

PROVIDER: S-EPMC3184528 | biostudies-literature | 2011 Aug

REPOSITORIES: biostudies-literature

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Serotonin 2C receptor activates a distinct population of arcuate pro-opiomelanocortin neurons via TRPC channels.

Sohn Jong-Woo JW Xu Yong Y Jones Juli E JE Wickman Kevin K Williams Kevin W KW Elmquist Joel K JK

Neuron 20110801 3

<h4>Video abstract</h4>Serotonin 2C receptors (5-HT(2C)Rs) expressed by pro-opiomelanocortin (POMC) neurons of hypothalamic arcuate nucleus regulate food intake, energy homeostasis and glucose metabolism. However, the cellular mechanisms underlying the effects of 5-HT to regulate POMC neuronal activity via 5-HT(2C)Rs have not yet been identified. In the present study, we found the putative transient receptor potential C (TRPC) channels mediate the activation of a subpopulation of POMC neurons by ...[more]

PMID: 21835345

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Serotonin 2C receptors in pro-opiomelanocortin neurons regulate energy and glucose homeostasis.

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TRPC channels are not required for graded persistent activity in entorhinal cortex neurons.

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