High-fidelity optical reporting of neuronal electrical activity with an ultrafast fluorescent voltage sensor.

High-fidelity optical reporting of neuronal electrical activity with an ultrafast fluorescent voltage sensor.
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DOI:
10.1038/nn.3709
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发表时间:
2014-06
影响因子:
25
通讯作者:
Lin, Michael Z.
Lin, Michael Z.
中科院分区:
医学1区
文献类型:
--
作者:
St-Pierre, Francois;Marshall, Jesse D.;Yang, Ying;Gong, Yiyang;Schnitzer, Mark J.;Lin, Michael Z.

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在遗传定义的神经元群体中精确的光学报告电活动是神经科学的长期目标。在这里,我们描述了加速传感器的动作电位1(ASAP 1),一种新型的电压传感器设计,其中一个循环排列的绿色荧光蛋白插入细胞外环的电压传感域,使荧光响应膜电位。ASAP 1显示了2.1和2.0 ms的开启和关闭动力学,可靠地检测单个动作电位和阈下电位变化,并在单次试验中跟踪高达200 Hz的动作电位波形序列。凭借亮度、动态范围和速度的良好组合,ASAP 1能够使用标准落射荧光显微镜以KHz帧率连续监测神经元中的膜电位。
Accurate optical reporting of electrical activity in genetically defined neuronal populations is a long-standing goal in neuroscience. Here we describe Accelerated Sensor of Action Potentials 1 (ASAP1), a novel voltage sensor design in which a circularly permuted green fluorescent protein is inserted within an extracellular loop of a voltage-sensing domain, rendering fluorescence responsive to membrane potential. ASAP1 demonstrates on- and off- kinetics of 2.1 and 2.0 ms, reliably detects single action potentials and subthreshold potential changes, and tracks trains of action potential waveforms up to 200 Hz in single trials. With a favorable combination of brightness, dynamic range, and speed, ASAP1 enables continuous monitoring of membrane potential in neurons at KHz frame rates using standard epifluorescence microscopy.
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影响因子: 16.8
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