Four GABAergic interneurons impose feeding restraint in Drosophila.

Four GABAergic interneurons impose feeding restraint in Drosophila.
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DOI:
10.1016/j.neuron.2014.05.006
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发表时间:
2014-07-02
期刊:
影响因子:
16.2
通讯作者:
Scott K
Scott K
中科院分区:
医学1区
文献类型:
--
作者:
Pool AH;Kvello P;Mann K;Cheung SK;Gordon MD;Wang L;Scott K

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饲料是由食物来源的适口性和动物的生理需要动态调节的。消耗是如何受外部感官信号和内部代谢状态控制的,目前仍在深入研究中。在这里,我们确定了果蝇大脑中的四个gaba能中间神经元,它们建立了抑制消耗所需的中央摄食阈值。这些细胞的失活导致不分青红皂白和过量摄入所有化合物,而不受味道质量或营养状况的影响。相反,这些神经元的急性激活会抑制水和营养物质的消耗。这些神经元的输出是控制进食起始和消耗的运动神经元的活动所必需的。因此,我们的研究揭示了进食回路中一种新的抑制控制层,它需要抑制不受限制和非选择性消费的潜在状态。
Feeding is dynamically regulated by the palatability of the food source and the physiological needs of the animal. How consumption is controlled by external sensory cues and internal metabolic state remains under intense investigation. Here, we identify four GABAergic interneurons in the Drosophila brain that establish a central feeding threshold which is required to inhibit consumption. Inactivation of these cells results in indiscriminate and excessive intake of all compounds, independent of taste quality or nutritional state. Conversely, acute activation of these neurons suppresses consumption of water and nutrients. The output from these neurons is required to gate activity in motor neurons that control meal initiation and consumption. Thus, our study reveals a new layer of inhibitory control in feeding circuits that is required to suppress a latent state of unrestricted and non-selective consumption.
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