Optical interrogation of neural circuits in Caenorhabditis elegans.

Optical interrogation of neural circuits in Caenorhabditis elegans.
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DOI:
10.1038/nmeth.1397
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发表时间:
2009-12
期刊:
影响因子:
48
通讯作者:
Ramanathan, Sharad
Ramanathan, Sharad
中科院分区:
生物学1区
文献类型:
--
作者:
Guo, Zengcai V.;Hart, Anne C.;Ramanathan, Sharad

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秀丽隐杆线虫(Caelophabditis elegans)有一个紧凑的神经系统,只有302个神经元。而这些神经元之间的突触连接已被确定的电子显微镜系列重建,功能连接已推断只有少数神经元之间的组合,通过电生理学,细胞消融,在体内钙成像和遗传分析。为了绘制神经元之间的功能连接,我们将体内光学刺激与同步钙成像相结合。我们分析了从ASH感觉神经元和RIM中间神经元到命令中间神经元AVA和AVD的连接。使用通道视紫红质-2(ChR 2)刺激ASH或RIM神经元导致AVA神经元激活,引起回避行为。我们的研究结果表明,我们可以激发表达ChR 2的特定神经元,同时监测其他几个神经元中的G-CaMP荧光,从而有可能快速破译C.神经回路
The nematode Caenorhabditis elegans has a compact nervous system with only 302 neurons. Whereas most of the synaptic connections between these neurons have been identified by electron microscopy serial reconstructions, functional connections have been inferred between only a few neurons through combinations of electrophysiology, cell ablation, in vivo calcium imaging and genetic analysis. To map functional connections between neurons, we combined in vivo optical stimulation with simultaneous calcium imaging. We analyzed the connections from the ASH sensory neurons and RIM interneurons to the command interneurons AVA and AVD. Stimulation of ASH or RIM neurons using channelrhodopsin-2 (ChR2) resulted in activation of AVA neurons, evoking an avoidance behavior. Our results demonstrate that we can excite specific neurons expressing ChR2 while simultaneously monitoring G-CaMP fluorescence in several other neurons, making it possible to rapidly decipher functional connections in C. elegans neural circuits.
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