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Publication : Genetically and functionally defined NTS to PBN brain circuits mediating anorexia.

First Author  Roman CW Year  2016
Journal  Nat Commun Volume  7
Pages  11905 PubMed ID  27301688
Mgi Jnum  J:239889 Mgi Id  MGI:5881993
Doi  10.1038/ncomms11905 Citation  Roman CW, et al. (2016) Genetically and functionally defined NTS to PBN brain circuits mediating anorexia. Nat Commun 7:11905
abstractText  The central nervous system controls food consumption to maintain metabolic homoeostasis. In response to a meal, visceral signals from the gut activate neurons in the nucleus of the solitary tract (NTS) via the vagus nerve. These NTS neurons then excite brain regions known to mediate feeding behaviour, such as the lateral parabrachial nucleus (PBN). We previously described a neural circuit for appetite suppression involving calcitonin gene-related protein (CGRP)-expressing PBN (CGRP(PBN)) neurons; however, the molecular identity of the inputs to these neurons was not established. Here we identify cholecystokinin (CCK) and noradrenergic, dopamine beta-hydroxylase (DBH)-expressing NTS neurons as two separate populations that directly excite CGRP(PBN) neurons. When these NTS neurons are activated using optogenetic or chemogenetic methods, food intake decreases and with chronic stimulation mice lose body weight. Our optogenetic results reveal that CCK and DBH neurons in the NTS directly engage CGRP(PBN) neurons to promote anorexia.
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