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Parallel Recordings of Transmembrane hERG Channel Currents Based on Solvent-Free Lipid Bilayer Microarray
Ryusuke Miyata1, Daisuke Tadaki1, Daichi Yamaura1
1Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan.
Micromachines
|January 22, 2021
Summary
Researchers developed a new microarray system using silicon chips to create stable, solvent-free bilayer lipid membranes (BLMs). This improved system enables efficient, parallel functional analysis of ion channels, like the hERG potassium channel, for drug screening.
Area of Science:
- Biophysics
- Nanotechnology
- Pharmacology
Background:
- Reconstituting ion-channel proteins in artificial bilayer lipid membranes (BLMs) is crucial for functional analysis and drug screening.
- Existing BLM systems face challenges in efficiency and stability for high-throughput applications.
Purpose of the Study:
- To enhance the efficiency of BLM reconstitution systems for ion channel analysis.
- To develop a stable, solvent-free BLM microarray platform for parallel recordings.
Main Methods:
- Fabrication of micro-apertured silicon (Si) chips with nano- and micro-tapered edges.
- Formation of a microarray of 16 stable, solvent-free BLMs within microfabricated wells.
- Simultaneous parallel recordings of ion-channel activities using the human ether-a-go-go-related gene (hERG) potassium channel.
Main Results:
- Successfully formed 11 to 16 BLMs simultaneously, achieving an average of 13.1 BLMs with an 82% formation probability.
- Demonstrated parallel recordings of ion-channel activities from multiple BLMs.
- Validated the system using the hERG potassium channel, known for its role in drug-induced arrhythmias.
Conclusions:
- The developed Si chip-based microarray system significantly improves the efficiency and throughput of BLM reconstitution for ion channel studies.
- This platform offers a robust tool for functional analysis of ion channels and screening drug effects.
- The system holds promise for advancing research into ion channel function and drug safety, particularly for channels like hERG.
