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Controllable and Stable Fusion Strategy on Microfluidics.

Yaqi Bai1, Xiaoling Zhang2, Xuefeng Wang1

  • 1Key Laboratory of Biorheological Science and Technology, Ministry of Education and Bioengineering College, Chongqing University, Chongqing 400044, China.

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|March 19, 2024
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Summary

A novel microfluidic device enables stable cell electrofusion, achieving high fusion efficiencies. This method precisely positions cells for reliable electroporation and membrane recombination, simplifying complex cell fusion processes.

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Area of Science:

  • Biotechnology
  • Microfluidics
  • Cell Biology

Background:

  • Traditional cell electrofusion methods face challenges with stability and precise cell manipulation.
  • Achieving high efficiency and reproducibility in cell fusion is crucial for various biotechnological applications.

Purpose of the Study:

  • To develop a simple, stable, and efficient microfluidic electrofusion method.
  • To enhance cell pairing and fusion efficiency using a microfluidic device with cell cages.

Main Methods:

  • Design and fabrication of a microfluidic device featuring 200 individual cell "cage" structures.
  • Utilizing hydrodynamic forces for precise cell positioning within the cages.
  • Implementing a modulated hypotonic solution substitution and microstructure for stable cell membrane recombination during electroporation.

Main Results:

  • Efficient cell pairing achieved with approximately 80.0 ± 4.6% success rate under hydrodynamic force.
  • High cell fusion efficiency demonstrated at approximately 88.3 ± 0.6% upon pulse signal application.
  • The microfluidic design ensured stable cell positioning, enabling repeated electroporation in the same contact region.

Conclusions:

  • The developed microfluidic electrofusion method offers a simple and stable platform for high-efficiency cell fusion.
  • Precise cell manipulation and controlled microenvironment provided by the device are key to successful and reproducible electrofusion.
  • This technique holds promise for advancing cell-based therapies and synthetic biology applications.