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A microfluidic device enabling high-efficiency single cell trapping.

D Jin1, B Deng2, J X Li3

  • 1Department of Precision Instruments, Tsinghua University , Beijing, China.

Biomicrofluidics
|January 23, 2015
PubMed
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This study introduces a new microfluidic device for efficient single cell trapping, improving cell sample utilization and throughput. The optimized design enhances cell trapping speed and space efficiency for various cell types.

Area of Science:

  • Biotechnology
  • Microfluidics
  • Cell Biology

Background:

  • Single cell analysis is crucial for cell studies.
  • Microfluidic devices are widely used for single cell immobilization.
  • Improving single cell trapping efficiency is an ongoing challenge.

Purpose of the Study:

  • To develop a passive hydrodynamic microfluidic device for enhanced single cell trapping efficiency.
  • To optimize device geometry for different cell types using computational fluid dynamics.
  • To demonstrate the device's effectiveness with HeLa and HEK-293T cells.

Main Methods:

  • Design of a passive hydrodynamic microfluidic device utilizing T and inverse T junctions.
  • Optimization of geometric parameters using computational fluid dynamics (CFD) simulations.

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  • Fabrication of polydimethylsiloxane (PDMS) microfluidic devices for experimental validation.

    • Main Results:

    • Achieved 100% cell trapping and 90% single cell trapping efficiency across 400 trap sites for HeLa and HEK-293T cells.
    • Demonstrated a 2-fold space saving and a 3-fold increase in cell trapping speed compared to existing devices.
    • Validated the device's capability for trapping diverse cell types and scaling to tens of thousands of cells on a 1-cm² area.

    Conclusions:

    • The developed microfluidic device offers a space-saving and high-throughput solution for single cell trapping.
    • The deterministic trapping mechanism conserves valuable cell samples.
    • This technology facilitates large-scale single cell patterning and on-chip cellular assays.