Branch-specific plasticity of a bifunctional dopamine circuit encodes protein hunger.

Branch-specific plasticity of a bifunctional dopamine circuit encodes protein hunger.
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DOI:
10.1126/science.aal3245
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发表时间:
2017-05-05
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Wu MN
Wu MN
中科院分区:
其他
文献类型:
--
作者:
Liu Q;Tabuchi M;Liu S;Kodama L;Horiuchi W;Daniels J;Chiu L;Baldoni D;Wu MN

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自由生活的动物不仅要调节它们的食物摄入量,还要选择摄取哪种食物。由特定营养饥饿驱动的食物偏好的转变可能对生存至关重要,但对潜在机制知之甚少。我们确定了一个多巴胺回路,编码蛋白质特异性饥饿的果蝇。这些神经元的活性在大量蛋白质剥夺后增加。这一回路的激活通过向不同的下游神经元发出信号,同时促进蛋白质摄入和限制糖的消耗。蛋白质饥饿引发了这些多巴胺能神经元的分支特异性可塑性变化,从而实现了持续的蛋白质消耗。这些研究揭示了动物调整饮食策略以维持蛋白质稳态的关键电路机制。
Free-living animals must not only regulate the amount of food they consume, but also choose which types of food to ingest. The shifting of food preference driven by nutrient-specific hunger can be essential for survival, yet little is known about the underlying mechanisms. We identified a dopamine circuit that encodes protein-specific hunger in Drosophila. The activity of these neurons is increased following substantial protein deprivation. Activation of this circuit simultaneously promoted protein intake and restricted sugar consumption, via signaling to distinct downstream neurons. Protein starvation triggered branch-specific plastic changes in these dopaminergic neurons, thus enabling sustained protein consumption. These studies reveal a crucial circuit mechanism by which animals adjust their dietary strategy to maintain protein homeostasis.
两种多巴胺能神经元向背扇形身体发出信号,以促进果蝇的清醒。
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