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High-fidelity patch-clamp recordings from neurons cultured on a polymer microchip

Martinez, Dolores and Py, Christophe and Denhoff, Mike W. and Martina, Marzia and Monette, Robert and Comas, Tanya and Luk, Collin and Syed, Naweed and Mealing, Geoff (2010) High-fidelity patch-clamp recordings from neurons cultured on a polymer microchip. Biomedical Microdevices, 12 (6). pp. 977-985.

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Official URL: http://www.springerlink.com/content/m681p733097267...

Abstract

We present a polymer microchip capable of monitoring neuronal activity with a fidelity never before obtained on a planar patch-clamp device. Cardio-respiratory neurons Left Pedal Dorsal 1 (LPeD1) from mollusc Lymnaea were cultured on the microchip’s polyimide surface for 2 to 4 hours. Cultured neurons formed high resistance seals (gigaseals) between the cell membrane and the surface surrounding apertures etched in the polyimide. Gigaseal formation was observed without applying external force, such as suction, on neurons. The formation of gigaseals, as well as the low access resistance and shunt capacitance values of the polymer microchip resulted in high-fidelity recordings. On-chip culture of neurons permitted, for the first time on a polymeric patch-clamp device, the recording of high fidelity physiological action potentials. Microfabrication of the hybrid poly(dimethylsiloxane)—polyimide (PDMS-PI) microchip is discussed, including a two-layer PDMS processing technique resulting in minimized shrinking variations.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:9894
Deposited By:JNCASR
Deposited On:26 Nov 2010 05:41
Last Modified:26 Nov 2010 05:41

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