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Related Experiment Videos

Silicon chip-based patch-clamp electrodes integrated with PDMS microfluidics.

Rigo Pantoja1, John M Nagarah, Dorine M Starace

  • 1Department of Chemistry and Biochemistry, School of Medicine, The California NanoSystems Institute, University of California, Los Angeles, CA 90095-1569, USA.

Biosensors & Bioelectronics
|October 21, 2004
PubMed
Summary

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A novel silicon chip device enables recording of ion channel activity in various cell types. This technology offers advantages over traditional methods for biophysics research and drug screening.

Area of Science:

  • Biophysics
  • Cellular Electrophysiology
  • Biosensor Technology

Background:

  • Traditional methods for recording ion channel activity, such as micropipette techniques, face limitations in throughput and versatility.
  • Understanding ion channel function is crucial for numerous biological processes and disease mechanisms.

Purpose of the Study:

  • To develop and validate a silicon wafer-based device for high-performance recording of macroscopic ion channel protein activities.
  • To demonstrate the device's capability across diverse cell types and electrophysiological configurations.
  • To integrate microfluidics for enhanced cell handling and targeted recordings.

Main Methods:

  • Fabrication of silicon chips with integrated micropores for cell interfacing.
  • Achieving high-resistance (gigaohm) seals with various cell lines (CHO-K1, RIN m5F).

Related Experiment Videos

  • Utilizing both cell-attached and whole-cell recording configurations.
  • Coupling polydimethylsiloxane (PDMS) microfluidics for precise cell positioning and recording.

    • Main Results:

    • Successful gigaohm seal formation and demonstration of cell-attached and whole-cell modes in CHO-K1 and RIN m5F cells.
    • Recording of two distinct intrinsic potassium ion channels in HIT-T15 and RAW 264.7 cells using whole-cell mode.
    • Demonstration of selective cell-to-micropore targeting and subsequent membrane protein current recording using integrated PDMS microfluidics.

    Conclusions:

    • The developed silicon chip device provides a robust platform for recording ion channel activity in diverse cell types.
    • This technology surpasses traditional micropipette methods, offering significant advantages for research.
    • The device holds potential as a combinatorial tool for membrane biophysics, pharmaceutical screening, and advanced bio-sensing applications.