Brainstem nutrient sensing in the nucleus of the solitary tract inhibits feeding.

Brainstem nutrient sensing in the nucleus of the solitary tract inhibits feeding.
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DOI:
10.1016/j.cmet.2012.10.003
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发表时间:
2012-11-07
期刊:
影响因子:
29
通讯作者:
Schwartz GJ
Schwartz GJ
中科院分区:
生物学1区
文献类型:
--
作者:
Blouet C;Schwartz GJ

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Direct detection of circulating nutrients by the central nervous system has been implicated in the regulation of energy balance, and the mediobasal hypothalamus is considered the primary sensing site mediating these effects. Neurons sensitive to energy-related signals have also been identified outside the hypothalamus, particularly within the caudomedial nucleus of the solitary tract (cmNTS) in brainstem, but the consequences of direct NTS nutrient detection on energy balance remain poorly characterized. Here we determined the behavioral and metabolic consequences of direct L-leucine detection by the cmNTS and investigated the intracellular signaling and neurochemical pathways implicated in cmNTS L-leucine sensing in rats. Our results support the distributed nature of central nutrient detection, evidence a role for the cmNTS S6K1 pathway in the regulation of meal size and body weight, and suggest that the cmNTS integrates direct cmNTS nutrient detection with gut-derived, descending forebrain, and adiposity signals of energy availability to regulate food intake.
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