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Continuous perfusion microfluidic cell culture array for high-throughput cell-based assays.

Paul J Hung1, Philip J Lee, Poorya Sabounchi

  • 1Berkeley Sensor & Actuator Center, Department of Bioengineering, University of California, 485 Evans Hall, Berkeley, CA 94720, USA.

Biotechnology and Bioengineering
|December 8, 2004
PubMed
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This study introduces a novel microfluidic cell culture array for long-term monitoring of 100 experiments simultaneously. This platform enables integrated cell growth, reagent delivery, and real-time analysis for diverse biological assays.

Area of Science:

  • Biotechnology
  • Cell Biology
  • Microfluidics

Background:

  • Traditional cell culture methods are labor-intensive and limit high-throughput analysis.
  • There is a need for integrated systems that can perform multiple cell-based assays concurrently and over extended periods.

Purpose of the Study:

  • To develop and validate a novel microfluidic cell culture array for parallel, long-term cellular monitoring.
  • To demonstrate the system's capability for integrated cell culture processes, including growth, passage, and real-time analysis.

Main Methods:

  • A 10x10 microfluidic array with individual chambers, perfusion channels, and fluidic ports was designed and fabricated.
  • Human carcinoma (HeLa) cells were cultured under continuous perfusion at 37°C.
  • Cell growth, passage using trypsin, and fluorescence-based assays (calcein AM) were monitored over time.

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Main Results:

  • The microfluidic array successfully supported long-term culture of HeLa cells with a doubling time of 1.4 ± 0.1 days and a peak density of 2.5*10^5 cells/cm^2.
  • Demonstrated stable cell passage and regrowth within the chambers, indicating suitability for continuous operation.
  • Real-time monitoring of fluorescence localization was achieved from 1 minute to 10 days post-reagent introduction.

Conclusions:

  • The developed microfluidic cell culture array provides a robust platform for high-throughput, long-term cellular monitoring.
  • The system integrates essential cell culture functions, enabling parallel assays for applications in drug screening, bioinformatics, and quantitative cell biology.