作者
Alfonso Abizaid, Zhong-Wu Liu, Zane B Andrews, Marya Shanabrough, Erzsebet Borok, John D Elsworth, Robert H Roth, Mark W Sleeman, Marina R Picciotto, Matthias H Tschöp, Xiao-Bing Gao, Tamas L Horvath
发表日期
2006/12/1
期刊
The Journal of clinical investigation
卷号
116
期号
12
页码范围
3229-3239
出版商
American Society for Clinical Investigation
简介
The gut hormone ghrelin targets the brain to promote food intake and adiposity. The ghrelin receptor growth hormone secretagogue 1 receptor (GHSR) is present in hypothalamic centers controlling energy metabolism as well as in the ventral tegmental area (VTA), a region important for motivational aspects of multiple behaviors, including feeding. Here we show that in mice and rats, ghrelin bound to neurons of the VTA, where it triggered increased dopamine neuronal activity, synapse formation, and dopamine turnover in the nucleus accumbens in a GHSR-dependent manner. Direct VTA administration of ghrelin also triggered feeding, while intra-VTA delivery of a selective GHSR antagonist blocked the orexigenic effect of circulating ghrelin and blunted rebound feeding following fasting. In addition, ghrelin- and GHSR-deficient mice showed attenuated feeding responses to restricted feeding schedules. Taken …
引用总数
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