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Related Experiment Video

Updated: Aug 30, 2025

A Microfluidic Chip for the Versatile Chemical Analysis of Single Cells
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A Resistance-Based Microfluidic Chip for Deterministic Single Cell Trapping Followed by Immunofluorescence Staining.

Xiange Sun1, Bowen Li1, Wenman Li1

  • 1Department of Laboratory Medicine, Daping Hospital, Army Medical University, Chongqing 400042, China.

Micromachines
|August 26, 2022
PubMed
Summary

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This study introduces a novel microfluidic chip for deterministic single-cell trapping, improving efficiency for cell analysis. The chip utilizes flow resistance principles to enhance cell capture and reduce loss during immunofluorescence staining.

Area of Science:

  • Biotechnology and Biomedical Engineering
  • Single-cell analysis technologies

Background:

  • Microfluidic chips are essential for single-cell analysis but often lack deterministic single-cell trapping capabilities.
  • Existing methods struggle with precise cell isolation, limiting downstream applications like immunofluorescence staining.

Purpose of the Study:

  • To develop a novel microfluidic chip enabling deterministic single-cell trapping.
  • To implement immunofluorescence staining on trapped single cells with high efficiency and minimal cell loss.

Main Methods:

  • Designed a resistance-based microfluidic chip featuring specific channel geometries (circular structure, serpentine channel) to exploit the least flow resistance principle.
  • Utilized numerical simulations to optimize geometric parameters for enhanced cell trapping.
Keywords:
immunofluorescence stainingleast flow resistancemicrofluidic chipsingle-cell trapping

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  • Validated chip performance using A549 and K562 cell lines, incorporating cell immobilization techniques.

    • Main Results:

    • Achieved high single-cell trapping efficiencies of (82.7 ± 2.4)% for A549 and (84 ± 3.3)% for K562 cells.
    • Demonstrated successful real-time tracking of immobilized cells during multistep immunofluorescence staining.
    • Confirmed reduced cell movement and loss due to effective cell immobilization.

    Conclusions:

    • The developed microfluidic chip offers a simple, high-efficiency solution for deterministic single-cell trapping.
    • The chip facilitates robust immunofluorescence staining, minimizing cell loss.
    • This technology holds potential as an analytical platform for studying tumor cell heterogeneity and clinical diagnostics.