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Quantitative comparison between microfluidic and microtiter plate formats for cell-based assays.

Huabing Yin1, Nicola Pattrick, Xunli Zhang

  • 1Department of Electronics, University of Glasgow, Glasgow, G12 8LT, UK.

Analytical Chemistry
|December 7, 2007
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Summary

This study compares microfluidic and microtiter plate assays for measuring calcium (Ca2+) responses in cells. Results show excellent agreement, with on-chip methods offering faster screening and subcellular Ca2+ flux insights.

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Area of Science:

  • Biotechnology
  • Cell Biology
  • Assay Development

Background:

  • Quantitative cell-based assays are crucial for drug discovery and biological research.
  • Measuring intracellular calcium (Ca2+) flux is a common method to study cellular responses.
  • Microfluidic and microtiter plate formats offer different advantages for cell-based assays.

Purpose of the Study:

  • To compare the performance of microfluidic and microtiter plate formats for a quantitative cell-based assay.
  • To assess the agreement between on-chip and traditional well-plate assay results.
  • To explore the potential of microfluidic assays for faster screening and subcellular analysis.

Main Methods:

  • A quantitative cell-based assay was developed to measure intracellular Ca2+ response.
  • The assay utilized uridine 5'-triphosphate as the agonist in Chinese hamster ovary (CHO) cells.
  • Experiments were conducted in both microfluidic and microtiter plate formats, using suspended immobilized and cultured adherent cells.

Main Results:

  • Excellent agreement was observed between microfluidic (on-chip) and microtiter plate (well-plate) assay results under optimized hydrodynamic conditions.
  • Both suspended immobilized cells and cultured adherent cells yielded comparable data across formats.
  • The on-chip assay with adherent cells demonstrated potential for accelerated screening protocols.

Conclusions:

  • Microfluidic assays provide a viable and accurate alternative to traditional microtiter plate assays for quantitative cell-based measurements.
  • On-chip assays offer enhanced capabilities, including faster screening and the potential to resolve subcellular Ca2+ flux dynamics.
  • This technology can advance high-throughput screening and detailed cellular mechanism studies.