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首页> 外文期刊>Neuron >Selective photostimulation of genetically chARGed neurons.
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Selective photostimulation of genetically chARGed neurons.

机译:遗传改变的神经元的选择性光刺激。

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摘要

To permit direct functional analyses of neural circuits, we have developed a method for stimulating groups of genetically designated neurons optically. Coexpression of the Drosophila photoreceptor genes encoding arrestin-2, rhodopsin (formed by liganding opsin with retinal), and the alpha subunit of the cognate heterotrimeric G protein--an explosive combination we term "chARGe"--sensitizes generalist vertebrate neurons to light. Illumination of a mixed population of neurons elicits action potentials selectively and cell-autonomously in its genetically chARGed members. In contrast to bath-applied photostimulants or caged neurotransmitters, which act indiscriminately throughout the illuminated volume, chARGe localizes the responsiveness to light. Distributed activity may thus be fed directly into a circumscribed population of neurons in intact tissue, irrespective of the spatial arrangement of its elements.
机译:为了允许对神经回路进行直接功能分析,我们开发了一种光学上刺激遗传指定神经元组的方法。果蝇感光细胞基因的共表达,其编码抑制蛋白2,视紫红质(视蛋白与视网膜配体形成)和同源异源三聚体G蛋白的α亚基(一种爆炸性组合,我们称为“ chARGe”)使通体脊椎动物神经元对光敏感。混合神经元群体的照明在其遗传改变的成员中选择性地和细胞自主地引发动作电位。与在整个照明范围内不加区别地作用于浴的光刺激剂或笼中神经递质相反,chARGe可以定位对光的响应能力。因此,无论其元素的空间排列如何,都可以将分布的活动直接馈入完整组织中的神经元的限定群体中。

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