Title : Nicotine excites hypothalamic arcuate anorexigenic proopiomelanocortin neurons and orexigenic neuropeptide Y neurons: similarities and differences.

Pub. Date : 2011 Sep

PMID : 21653710






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1 Nicotine excites hypothalamic arcuate anorexigenic proopiomelanocortin neurons and orexigenic neuropeptide Y neurons: similarities and differences. Nicotine proopiomelanocortin Homo sapiens
2 Here we address the hypothesis that if weight-reducing actions of nicotine are mediated by anorexigenic proopiomelanocortin (POMC) neurons of the hypothalamic arcuate nucleus, nicotine should excite these cells. Nicotine proopiomelanocortin Homo sapiens
3 Here we address the hypothesis that if weight-reducing actions of nicotine are mediated by anorexigenic proopiomelanocortin (POMC) neurons of the hypothalamic arcuate nucleus, nicotine should excite these cells. Nicotine proopiomelanocortin Homo sapiens
4 Here we address the hypothesis that if weight-reducing actions of nicotine are mediated by anorexigenic proopiomelanocortin (POMC) neurons of the hypothalamic arcuate nucleus, nicotine should excite these cells. Nicotine proopiomelanocortin Homo sapiens
5 Here we address the hypothesis that if weight-reducing actions of nicotine are mediated by anorexigenic proopiomelanocortin (POMC) neurons of the hypothalamic arcuate nucleus, nicotine should excite these cells. Nicotine proopiomelanocortin Homo sapiens
6 Nicotine at concentrations similar to those found in smokers, 100-1,000 nM, excited POMC cells by mechanisms based on increased spike frequency, depolarization of membrane potential, and opening of ion channels. Nicotine proopiomelanocortin Homo sapiens
7 Nicotine exerted similar actions on POMC and NPY cells, with a slightly greater depolarizing action on POMC cells. Nicotine proopiomelanocortin Homo sapiens
8 Nicotine exerted similar actions on POMC and NPY cells, with a slightly greater depolarizing action on POMC cells. Nicotine proopiomelanocortin Homo sapiens
9 Together, these results indicate that nicotine has a number of similar actions, but also a few different actions, on POMC and NPY neurons that could contribute to the weight loss associated with smoking. Nicotine proopiomelanocortin Homo sapiens