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Updated: Aug 14, 2025

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Optically driven microtools with an antibody-immobilised surface for on-site cell assembly.

Shuntaro Mori1, Takumi Ito1, Hidekuni Takao1,2

  • 1Department of Intelligent Mechanical Systems Engineering, Kagawa University, Takamatsu, Japan.

IET Nanobiotechnology
|January 17, 2023
PubMed
Summary

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Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference·2023

Researchers developed a novel microfluidic platform for precise single-cell assembly using optically driven microtools. This breakthrough advances regenerative medicine and drug screening by enabling the creation of complex cell clusters for in vitro organoid development.

Area of Science:

  • Biotechnology
  • Regenerative Medicine
  • Microfluidics

Background:

  • Accurate in vitro organ reproduction and efficient drug screening are crucial for advancing regenerative medicine.
  • Current methods lack the capability for single-cell resolution assembly required for complex tissue formation.

Purpose of the Study:

  • To develop a novel platform for on-site cell assembly at the single-cell level.
  • To enable the creation of cell clusters for improved in vitro organoid models and drug screening.

Main Methods:

  • Fabrication of optically driven microtools using SU-8 photolithography.
  • Immobilization of antibodies (targeting CD51/61 and CD44) onto microtool surfaces for specific cell capture.
  • Utilizing optical tweezers to manipulate microtools for capturing and assembling cells within a microfluidic device.
Keywords:
bioMEMSlaser beam applicationsmicrochannel flowmicrofabrication

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Main Results:

  • Demonstrated superior cell adhesion rates with antibody-immobilized microtools compared to other surface treatments.
  • Successfully assembled multiple cells into clusters by repeating the cell capture process.
  • Validated the platform's capability for precise, single-cell level assembly.

Conclusions:

  • The developed platform offers a viable method for on-site, single-cell level assembly.
  • This technology has significant potential applications in regenerative medicine and drug screening for creating in vivo-like cell clusters.
  • The microtool's adaptable geometry and surface function allow for customized cell assembly requirements.