Catch and Patch: A Pipette-Based Approach for Automating Patch Clamp That Enables Cell Selection and Fast Compound...

Area of Science:

• Electrophysiology
• Ion Channel Research
• Biophysics

Background:

• Manual patch clamp is the gold standard for recording ion channel activity.
• Current automation solutions sacrifice cell selection versatility for random cell usage.
• There is a need for automated patch clamp that preserves cell selection and versatility.

Purpose of the Study:

• To develop an automated patch clamp system that enables parallel recordings from purposely selected cells.
• To maintain the full versatility of manual patch clamp in an automated system.
• To integrate high-quality gigaseal recordings with ultrafast solution switching.

Main Methods:

• Developed an automated pipette positioning system for micrometer-precision electrode placement.
• Utilized a microfluidic cell handling device for targeted cell selection.
• Employed a patch pipette array on a conventional micromanipulator to mimic manual patch clamp.
• Designed the system for extensibility and integration with specialized equipment.

Main Results:

• Achieved fully automated patch clamp recordings from purposely selected cells.
• Enabled parallel recordings from multiple patch electrodes simultaneously.
• Combined high-quality gigaseal recordings with millisecond-timescale solution switching.
• Demonstrated extensibility for integration with tools like ultrafast compound application.

Conclusions:

• The developed automated patch clamp system successfully preserves the versatility of manual patch clamp.
• This approach allows for high-throughput electrophysiology on selected cells with precise control over solution exchange.
• The system offers a significant advancement for ion channel research and drug discovery.