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Related Experiment Videos

Open-access microfluidic patch-clamp array with raised lateral cell trapping sites.

Adrian Y Lau1, Paul J Hung, Angela R Wu

  • 1Biomolecular Nanotechnology Center, Berkeley Sensor & Actuator Center, Department of Bioengineering, University of California-Berkeley, Berkeley, CA 94720, USA.

Lab on a Chip
|January 5, 2007
PubMed
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A new microfluidic patch-clamp chip enables efficient whole-cell recordings and drug profiling. This innovative open-access system simplifies ion channel research and drug screening processes.

Area of Science:

  • Biotechnology
  • Microfluidics
  • Electrophysiology

Background:

  • Traditional patch-clamp techniques are labor-intensive and time-consuming.
  • Existing microfluidic devices often face challenges with cell trapping and seal formation.

Purpose of the Study:

  • To develop and validate a novel open-access microfluidic patch-clamp array chip.
  • To demonstrate its capability for efficient whole-cell patch-clamp measurements and drug profiling.

Main Methods:

  • Fabrication involved microscale soft-lithography and macroscale polymer methods.
  • Open-access patch-clamp sites were created using polydimethylsiloxane (PDMS) with macroscale hole patterning.
  • Seal resistances were characterized and correlated with aperture dimensions.
  • Whole-cell patch-clamp recordings were performed on CHO cells expressing Kv2.1 ion channels.

Related Experiment Videos

Main Results:

  • The developed microfluidic chip successfully enabled whole-cell patch-clamp measurements.
  • Seal resistances were found to correlate with aperture dimensions.
  • Dosage response of Kv2.1 ion channel blocker (TEA) was characterized, demonstrating binding activity.
  • The system proved efficient for drug profiling compared to traditional methods.

Conclusions:

  • The novel open-access microfluidic patch-clamp chip is a viable platform for electrophysiological studies.
  • This system offers a more efficient approach for ion channel research and pharmaceutical drug screening.