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Xu, Yong; Jones, Juli E.; Kohno, Daisuke; Williams, Kevin W.; Lee, Charlotte E.; Choi, Michelle J.; Anderson, Jason G.; Heisler, Lora K.; Zigman, Jeffrey M.; Lowell, Bradford B.; Elmquist, Joel K.
Neuron (Cambridge, Mass.), 11/2008, Letnik: 60, Številka: 4Journal Article
Drugs activating 5-hydroxytryptamine 2C receptors (5-HT2CRs) potently suppress appetite, but the underlying mechanisms for these effects are not fully understood. To tackle this issue, we generated mice with global 5-HT2CR deficiency (2C null) and mice with 5-HT2CRs re-expression only in pro-opiomelanocortin (POMC) neurons (2C/POMC mice). We show that 2C null mice predictably developed hyperphagia, hyperactivity, and obesity and showed attenuated responses to anorexigenic 5-HT drugs. Remarkably, all these deficiencies were normalized in 2C/POMC mice. These results demonstrate that 5-HT2CR expression solely in POMC neurons is sufficient to mediate effects of serotoninergic compounds on food intake. The findings also highlight the physiological relevance of the 5-HT2CR-melanocortin circuitry in the long-term regulation of energy balance.
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