Integration of autopatching with automated pipette and cell detection in vitro.

Abstract:

:Patch clamp is the main technique for measuring electrical properties of individual cells. Since its discovery in 1976 by Neher and Sakmann, patch clamp has been instrumental in broadening our understanding of the fundamental properties of ion channels and synapses in neurons. The conventional patch-clamp method requires manual, precise positioning of a glass micropipette against the cell membrane of a visually identified target neuron. Subsequently, a tight "gigaseal" connection between the pipette and the cell membrane is established, and suction is applied to establish the whole cell patch configuration to perform electrophysiological recordings. This procedure is repeated manually for each individual cell, making it labor intensive and time consuming. In this article we describe the development of a new automatic patch-clamp system for brain slices, which integrates all steps of the patch-clamp process: image acquisition through a microscope, computer vision-based identification of a patch pipette and fluorescently labeled neurons, micromanipulator control, and automated patching. We validated our system in brain slices from wild-type and transgenic mice expressing channelrhodopsin 2 under the Thy1 promoter (line 18) or injected with a herpes simplex virus-expressing archaerhodopsin, ArchT. Our computer vision-based algorithm makes the fluorescent cell detection and targeting user independent. Compared with manual patching, our system is superior in both success rate and average trial duration. It provides more reliable trial-to-trial control of the patching process and improves reproducibility of experiments.

journal_name

J Neurophysiol

authors

Wu 吴秋雨 Q,Kolb I,Callahan BM,Su Z,Stoy W,Kodandaramaiah SB,Neve R,Zeng H,Boyden ES,Forest CR,Chubykin AA

doi

10.1152/jn.00386.2016

subject

Has Abstract

pub_date

2016-10-01 00:00:00

pages

1564-1578

issue

4

eissn

0022-3077

issn

1522-1598

pii

jn.00386.2016

journal_volume

116

pub_type

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