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Advanced Microfluidic Device Designed for Cyclic Compression of Single Adherent Cells.

Kenneth K Y Ho1, Ying Lin Wang1, Jing Wu1,2

  • 1Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, United States.

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|November 3, 2018
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Summary

This study developed a new microfluidic device for single-cell mechanical testing. Researchers found that breast epithelial cells do not undergo permanent deformation after cyclic compression, advancing cell mechanics research.

Keywords:
cell mechanicscompressionmechanobiologymicrocontact printingmicrofluidicssingle-cell analysis

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Area of Science:

  • Mechanobiology
  • Cell mechanics
  • Biomaterials

Background:

  • Cells experience mechanical stresses like compression and tension.
  • Previous research showed permanent deformation after tensile load, but not after cyclic compression.
  • Limited tools exist for single-cell cyclic compression studies.

Purpose of the Study:

  • To develop a novel microfluidic device for precise single-cell cyclic compression.
  • To investigate whether cells exhibit plastic deformation after repetitive compressive loading.
  • To advance the field of cell mechanics and mechanobiology.

Main Methods:

  • Designed and optimized a single-cell microfluidic compression device with elastomeric membrane blocks and microcontact printing.
  • Utilized computational simulations to optimize device geometry.
  • Employed step-wise pneumatically controlled cell trapping for minimal mechanical perturbation.
  • Applied cyclic planar compression to breast epithelial MCF10A cells.

Main Results:

  • Successfully trapped and compressed single MCF10A cells within the microfluidic device.
  • Demonstrated that cells do not exhibit permanent deformation after 0.5 Hz cyclic compression for 6 minutes.
  • Validated the efficacy of the new device for mechanobiology studies.

Conclusions:

  • The developed single-cell microfluidic compression device is effective for studying cell mechanical responses.
  • Cells do not show plastic deformation under the tested cyclic compressive loading conditions.
  • This technology opens new avenues for research in cell mechanics and mechanobiology.