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A hindbrain dopaminergic neural circuit prevents weight gain by reinforcing food satiation

Sci Adv. 2021-05; 
Yong Han, Guobin Xia, Yanlin He, Yang He, Monica Farias, Yong Xu, Qi Wu
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摘要

The neural circuitry mechanism that underlies dopaminergic (DA) control of innate feeding behavior is largely uncharacterized. Here, we identified a subpopulation of DA neurons situated in the caudal ventral tegmental area (cVTA) directly innervating DRD1-expressing neurons within the lateral parabrachial nucleus (LPBN). This neural circuit potently suppresses food intake via enhanced satiation response. Notably, this cohort of DA neurons is activated immediately before the cessation of each feeding bout. Acute inhibition of these DA neurons before bout termination substantially suppresses satiety and prolongs the consummatory feeding. Activation of postsynaptic DRD1 neurons inhibits feeding, whereas genetic de... More

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