A central control circuit for encoding perceived food value.

A central control circuit for encoding perceived food value.
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DOI:
10.1126/sciadv.aau9180
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发表时间:
2018-11
期刊:
影响因子:
13.6
通讯作者:
Kemenes G
Kemenes G
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Crossley M;Staras K;Kemenes G

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编码饥饿状态的中枢多巴胺能神经元改变潜在食物刺激的感知值。饥饿状态可以实质上改变刺激的感知价值,甚至达到相同的感官提示可以触发对抗行为的程度。神经系统如何利用这些分级的感知转变在相反的运动模式之间进行选择仍然是个谜。在这里,我们挑战的食物剥夺和饱食之间的两个相互排斥的行为,摄取或排泄,由相同的喂养中央模式发生器的选择。解码潜在的神经回路揭示了中枢多巴胺能中间神经元的活动定义了饥饿状态并驱动网络重构,使饱足的动物偏向于拒绝被食物剥夺的动物认为可口的刺激。通过阻断这些神经元的作用,饱食的动物可以被重新配置为表现出饥饿的动物表型。这种集中的机制发生在完全没有感觉重新调整和概括在不同的感觉方式,允许食物剥夺的动物,以增加他们的食物价值的感知刺激独立的方式,以最大限度地提高潜在的热量摄入。
Central dopaminergic neurons encoding hunger state alter the perceived value of a potential food stimulus. Hunger state can substantially alter the perceived value of a stimulus, even to the extent that the same sensory cue can trigger antagonistic behaviors. How the nervous system uses these graded perceptual shifts to select between opposed motor patterns remains enigmatic. Here, we challenged food-deprived and satiated Lymnaea to choose between two mutually exclusive behaviors, ingestion or egestion, produced by the same feeding central pattern generator. Decoding the underlying neural circuit reveals that the activity of central dopaminergic interneurons defines hunger state and drives network reconfiguration, biasing satiated animals toward the rejection of stimuli deemed palatable by food-deprived ones. By blocking the action of these neurons, satiated animals can be reconfigured to exhibit a hungry animal phenotype. This centralized mechanism occurs in the complete absence of sensory retuning and generalizes across different sensory modalities, allowing food-deprived animals to increase their perception of food value in a stimulus-independent manner to maximize potential calorific intake.
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