A Neural Circuit for Gut-Induced Reward.

A Neural Circuit for Gut-Induced Reward.
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DOI:
10.1016/j.cell.2018.08.049
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发表时间:
2018-10-18
期刊:
影响因子:
64.5
通讯作者:
de Araujo IE
de Araujo IE
中科院分区:
生物学1区
文献类型:
--
作者:
Han W;Tellez LA;Perkins MH;Perez IO;Qu T;Ferreira J;Ferreira TL;Quinn D;Liu ZW;Gao XB;Kaelberer MM;Bohórquez DV;Shammah-Lagnado SJ;de Lartigue G;de Araujo IE

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The gut is now recognized as a major regulator of motivational and emotional states. However, the relevant gut-brain neuronal circuitry remains unknown. We show that optical activation of gut-innervating vagal sensory neurons recapitulates the hallmark effects of stimulating brain reward neurons. Specifically, right, but not left, vagal sensory ganglion activation sustained self-stimulation behavior, conditioned both flavor and place preferences, and induced dopamine release from Substantia nigra. Cell-specific transneuronal tracing revealed asymmetric ascending pathways of vagal origin throughout the central nervous system. In particular, transneuronal labeling identified the glutamatergic neurons of the dorsolateral parabrachial region as the obligatory relay linking the right vagal sensory ganglion to dopamine cells in Substantia nigra. Consistently, optical activation of parabrachio-nigral projections replicated the rewarding effects of right vagus excitation. Our findings establish the vagal gut-to-brain axis as an integral component of the neuronal reward pathway. They also suggest novel vagal stimulation approaches to affective disorders. A gut to brain neural circuit establishes vagal neurons as an essential component of the reward neuronal circuitry linking sensory neurons in the upper gut to striatal dopamine release.
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