Motor control in a Drosophila taste circuit.

Motor control in a Drosophila taste circuit.
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DOI:
10.1016/j.neuron.2008.12.033
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发表时间:
2009-02-12
期刊:
影响因子:
16.2
通讯作者:
Scott, Kristin
Scott, Kristin
中科院分区:
医学1区
文献类型:
--
作者:
Gordon, Michael D.;Scott, Kristin

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味觉引发的先天行为对于引导动物摄取营养物质和拒绝有毒化合物至关重要,但这些行为的神经基础尚不清楚。在此,我们利用一种神经沉默筛选方法来确定一种简单的果蝇味觉行为所必需的神经元,并对控制这种行为特定子程序的一个神经群体进行了表征。通过沉默和激活所定义的细胞群体的亚群,我们将参与味觉行为的神经元确定为位于咽下神经节(SOG)的一对运动神经元。运动神经元被味觉神经元的糖刺激激活,并被苦味化合物抑制;然而,利用分裂绿色荧光蛋白(split - GFP)进行的实验未检测到运动神经元和初级感觉神经元之间的直接连接,这表明有必要进一步研究以阐明连接这些群体的神经回路。综合来看,这些结果为未来的味觉回路分析提供了一种通用策略和一个有价值的起点。
Tastes elicit innate behaviors critical for directing animals to ingest nutritious substances and reject toxic compounds, but the neural basis of these behaviors is not understood. Here, we use a neural silencing screen to identify neurons required for a simple Drosophila taste behavior, and characterize a neural population that controls a specific subprogram of this behavior. By silencing and activating subsets of the defined cell population, we identify the neurons involved in the taste behavior as a pair of motor neurons located in the subesophageal ganglion (SOG). The motor neurons are activated by sugar stimulation of gustatory neurons and inhibited by bitter compounds; however, experiments utilizing split-GFP detect no direct connections between the motor neurons and primary sensory neurons, indicating that further study will be necessary to elucidate the circuitry bridging these populations. Combined, these results provide a general strategy and a valuable starting point for future taste circuit analysis.
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