Ion channel probes for scanning ion conductance microscopy.

Ion channel probes for scanning ion conductance microscopy.
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DOI:
10.1021/la504097f
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发表时间:
2014-12-23
期刊:
Langmuir : the ACS journal of surfaces and colloids
影响因子:
--
通讯作者:
Baker LA
Baker LA
中科院分区:
其他
文献类型:
--
作者:
Zhou Y;Bright LK;Shi W;Aspinwall CA;Baker LA

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离子通道的灵敏度和选择性为传感器的发展提供了一个诱人的机会。在这里,我们描述了离子通道探针(icp),它由多个离子通道组成,重组成脂质双层,悬浮在全氟玻璃微移液管的开口上。当与扫描离子电导显微镜(SICM)结合时,icp显示出依赖于膜中离子通道数量的距离依赖电流响应。与距离相关的电流作为反馈,探针横向平移,以证明与icp成像的可能性。ICP平台为SICM提供了几个潜在的优势,这将为将化学信息纳入成像和高分辨率成像提供令人兴奋的机会。
The sensitivity and selectivity of ion channels provide an appealing opportunity for sensor development. Here, we describe ion channel probes (ICPs), which consist of multiple ion channels reconstituted into lipid bilayers suspended across the opening of perflourinated glass micropipets. When incorporated with a scanning ion conductance microscope (SICM), ICPs displayed a distance-dependent current response that depended on the number of ion channels in the membrane. With distance-dependent current as feedback, probes were translated laterally, to demonstrate the possibility of imaging with ICPs. The ICP platform yields several potential advantages for SICM that will enable exciting opportunities for incorporation of chemical information into imaging and for high-resolution imaging.
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