Optogenetic manipulation of neural circuits and behavior in Drosophila larvae.

Optogenetic manipulation of neural circuits and behavior in Drosophila larvae.
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DOI:
10.1038/nprot.2012.079
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发表时间:
2012-07-12
期刊:
影响因子:
14.8
通讯作者:
Tracey, William Daniel, Jr.
Tracey, William Daniel, Jr.
中科院分区:
生物学1区
文献类型:
--
作者:
Honjo, Ken;Hwang, Richard Y.;Tracey, William Daniel, Jr.

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光遗传学是一种强大的工具,能够在行为动物中时空控制神经元活动和电路。在这里,我们描述了我们的协议在果蝇幼虫的神经元的光学激活。作为一个例子,我们讨论了使用光遗传学激活幼虫的伤害感受器和伤害行为的第三个幼虫龄。我们之前已经表明,使用我们实验室开发的空间定义的GAL 4驱动程序和有效的UAS-通道视紫红质-2的YFP转基因菌株,可以操纵神经元群体响应蓝光照射,并测试定义的神经回路的激活是否足以塑造感兴趣的行为。虽然我们只在幼虫阶段使用了这里描述的协议,但该程序可以适用于研究成年苍蝇的神经元-需要注意的是,蓝光可能无法充分穿透成年角质层以刺激大脑深处的神经元。这个过程需要一周的时间来培养光遗传学动物,每组大约一个小时的时间来进行行为测定。
Optogenetics is a powerful tool that enables spatiotemporal control of neuronal activity and circuits in behaving animals. Here, we describe our protocol for optical activation of neurons in Drosophila larvae. As an example, we discuss the use of optogenetics to activate larval nociceptors and nociception behaviors in the third larval instar. We have previously shown that, using spatially-defined GAL4 drivers and potent UAS-channelrhodopsin-2∷YFP transgenic strains developed in our laboratory, it is possible to manipulate neuronal populations in response to illumination by blue light and to test whether activation of defined neural circuits is sufficient to shape behaviors of interest. Although we have only used the protocol described here in larval stages, the procedure can be adapted to study neurons in adult flies – with the caveat that blue light may not sufficiently penetrate the adult cuticle to stimulate neurons deep in the brain. This procedure takes a week to culture optogenetic animals and about an hour per group for the behavioral assays.
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