An integrated serotonin and octopamine neuronal circuit directs the release of an endocrine signal to control C. elegans body fat.
An integrated serotonin and octopamine neuronal circuit directs the release of an endocrine signal to control C. elegans body fat.
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DOI:
10.1016/j.cmet.2013.09.007
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发表时间:
2013-11-05
期刊:
影响因子:
29
通讯作者:
Srinivasan S
中科院分区:
文献类型:
--
作者:
Noble T;Stieglitz J;Srinivasan S
Serotonin (5-hydroxytryptamine, 5-HT) is an ancient and conserved neuromodulator of energy balance. Despite its importance, the neural circuits and molecular mechanisms underlying 5-HT-mediated control of body fat remain poorly understood. Here we decipher the serotonergic neural circuit for body fat loss in C. elegans and show that the effects of 5-HT require signaling from octopamine, the invertebrate analog of adrenaline, to sustain body fat loss. Our results provide a potential molecular explanation for the long-observed potent effects of combined serotonergic and adrenergic weight loss drugs. In metabolic tissues we find that the conserved regulatory adipocyte triglyceride lipase ATGL-1 drives serotonergic fat loss. We show that the serotonergic chloride channel MOD-1 relays a long-range endocrine signal via C. elegans body cavity neurons to control distal ATGL-1 function, via the nuclear receptor NHR-76. Our findings establish a conserved neuroendocrine axis operated by neural serotonergic and adrenergic-like signaling, to regulate body fat.
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