Sensory detection of food rapidly modulates arcuate feeding circuits.

Sensory detection of food rapidly modulates arcuate feeding circuits.
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食物的感官检测快速调节弧形喂食电路。

DOI:
10.1016/j.cell.2015.01.033
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发表时间:
2015-02-26
期刊:
影响因子:
64.5
通讯作者:
Knight ZA
Knight ZA
中科院分区:
生物学1区
文献类型:
--
作者:
Chen Y;Lin YC;Kuo TW;Knight ZA

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饥饿是由专门的神经回路控制的,这种神经回路将体内平衡需求转化为动机行为。这些回路由营养状态的循环信号长期控制,但它们在行为时间尺度上的快速动力学仍不清楚。在这里,我们报告了控制食物摄入的两种关键细胞类型-AgRP和POMC神经元-在清醒行为小鼠中的自然活动的光学记录。我们意外地发现,对食物的感官检测足以迅速逆转这些神经元因能量不足而产生的激活状态。这种快速调节是特定细胞类型的,受食物适口性和营养状态的调节,发生在任何食物被消费之前。这些数据表明,AgRP和POMC神经元接收关于外部世界食物可获得性的实时信息,这表明这些神经元在控制促进食物发现的觅食等食欲行为方面发挥了主要作用。
Hunger is controlled by specialized neural circuits that translate homeostatic needs into motivated behaviors. These circuits are under chronic control by circulating signals of nutritional state, but their rapid dynamics on the timescale of behavior remain unknown. Here we report optical recording of the natural activity of two key cell types that control food intake, AgRP and POMC neurons, in awake behaving mice. We find unexpectedly that the sensory detection of food is sufficient to rapidly reverse the activation state of these neurons induced by energy deficit. This rapid regulation is cell-type-specific, modulated by food palatability and nutritional state, and occurs before any food is consumed. These data reveal that AgRP and POMC neurons receive real-time information about the availability of food in the external world, suggesting a primary role for these neurons in controlling appetitive behaviors such as foraging that promote the discovery of food.
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