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A serial dilution microfluidic device for cytotoxicity assays.

Adrian T O'Neill1, Nancy Monteiro-Riviere, Glenn M Walker

  • 1Dept. of Biomed. Eng., North Carolina Univ., Chapel Hill, NC, USA. atoneill@ncsu.edu

Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference
|October 20, 2007
PubMed
Summary

A new microfluidic device precisely generates linear serial dilutions for high-throughput cytotoxicity testing. This validated platform offers custom dilution schemes with exceptional linearity and flow rate consistency.

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Area of Science:

  • Biotechnology
  • Microfluidics
  • Assay Development

Background:

  • High-throughput screening requires precise fluid handling.
  • Existing methods for serial dilutions can be time-consuming and less accurate.
  • Microfluidic devices offer miniaturization and enhanced control for biological assays.

Purpose of the Study:

  • To develop and validate a novel microfluidic device for generating linear serial dilutions.
  • To integrate this device into a high-throughput cytotoxicity testing strategy.
  • To provide a modeling solution for custom linear dilution schemes.

Main Methods:

  • Design and fabrication of a microfluidic device for serial dilution.
  • Implementation of a two-input fluid stream system.

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  • Validation using precise dilution measurements and statistical analysis.
  • Testing device performance across a range of flow rates.

    • Main Results:

    • The microfluidic device successfully created linear serial dilutions from 1:9 to 9:1 across nine discrete steps.
    • Dilution linearity was validated with a high R2 value of 0.9993.
    • The device demonstrated consistent performance across flow rates from 0.5 to 16 microl/min, with an average standard deviation of 0.76%.

    Conclusions:

    • The novel microfluidic device provides a highly accurate and reproducible method for generating linear serial dilutions.
    • This platform significantly enhances productivity for high-throughput cytotoxicity testing.
    • The device's robustness across various flow rates makes it suitable for diverse experimental conditions.