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Imaging brain electric signals with genetically targeted voltage-sensitive fluorescent proteins

机译:使用遗传靶向的电压敏感荧光蛋白对脑电信号进行成像

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摘要

Cortical information processing relies on synaptic interactions between diverse classes of neurons with distinct electrophysiological and connection properties. Uncovering the operational principles of these elaborate circuits requires the probing of electrical activity from selected populations of defined neurons. Here we show that genetically encoded voltage-sensitive fluorescent proteins (VSFPs) provide an optical voltage report from targeted neurons in culture, acute brain slices and living mice. By expressing VSFPs in pyramidal cells of mouse somatosensory cortex, we also demonstrate that these probes can report cortical electrical responses to single sensory stimuli in vivo. These protein-based voltage probes will facilitate the analysis of cortical circuits in genetically defined cell populations and are hence a valuable addition to the optogenetic toolbox.
机译:皮质信息处理依赖于具有不同电生理和连接特性的不同种类的神经元之间的突触相互作用。揭示这些复杂电路的工作原理需要从选定的定义神经元群体中探查电活动。在这里,我们显示了遗传编码的电压敏感荧光蛋白(VSFP)提供了来自培养中的目标神经元,急性脑切片和活小鼠的光电压报告。通过在小鼠体感皮层的锥体细胞中表达VSFPs,我们还证明了这些探针可以报告体内对单个感觉刺激的皮层电响应。这些基于蛋白质的电压探针将有助于分析遗传定义的细胞群中的皮层回路,因此是光遗传学工具箱的宝贵补充。

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