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首页> 外文期刊>Neuron >Nanoscale-Targeted Patch-Clamp Recordings of Functional Presynaptic Ion Channels
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Nanoscale-Targeted Patch-Clamp Recordings of Functional Presynaptic Ion Channels

机译:功能性突触前离子通道的纳米级靶向膜片钳记录。

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摘要

Direct electrical access to presynaptic ion channels has hitherto been limited to large specialized terminals such as the calyx of Held or hippo-campal mossy fiber bouton. The electrophysiology and ion-channel complement of far more abundant small synaptic terminals (<1 u.m) remain poorly understood. Here we report a method based on superresolution scanning ion conductance imaging of small synapses in culture at approximately 100-150 nm 3D resolution, which allows presynaptic patch-clamp recordings in all four configurations (cell-attached, inside-out, outside-out, and whole-cell). Using this technique, we report presynaptic recordings of K~+, Na~+, Cr, and Ca~(2+) channels. This semiautomated approach allows direct investigation of the distribution and properties of presynaptic ion channels at small central synapses.
机译:迄今为止,直接电连接突触前离子通道仅限于大型专用终端,例如Held的花萼或海马-生苔藓纤维钮扣。仍然很少了解更丰富的小突触末端(<1μm)的电生理和离子通道互补。在这里,我们报告了一种基于小分辨率突触的超分辨扫描离子电导成像技术,可在大约100-150 nm的3D分辨率下进行成像,该方法可在所有四种配置(细胞附着,内向外,外向外,和整个单元格)。使用这种技术,我们报告了K〜+,Na〜+,Cr和Ca〜(2+)通道的突触前录音。这种半自动化的方法可以直接研究小的中央突触处的突触前离子通道的分布和性质。

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