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Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly
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Surface engineering within a microchannel for hydrodynamic and self-assembled cell patterning.

Xilal Y Rima1, Nicole Walters1, Luong T H Nguyen1

  • 1William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, USA.

Biomicrofluidics
|January 15, 2020
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Summary

This study introduces a novel microstamping technique for precise cell patterning, enabling high-throughput analysis of cell interactions. The platform revealed how lung cancer cells impede neutrophil swarming, highlighting the tumor microenvironment

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Area of Science:

  • Biotechnology
  • Cell Biology
  • Microfluidics

Background:

  • Cell patterning is crucial for high-throughput biological studies and understanding cellular mechanisms.
  • Existing methods offer limited resolution and throughput for complex cellular interactions.
  • Investigating the tumor microenvironment requires advanced tools to study cell-cell dynamics.

Purpose of the Study:

  • To develop a reproducible microstamping technique for large-scale cell patterning in microchannels.
  • To investigate the interaction between H1568 lung cancer cells and neutrophils.
  • To elucidate the role of inflammatory mediators in the non-small cell lung cancer tumor microenvironment.

Main Methods:

  • Engineered artificial surfaces using surface chemistry and microstamping for cell patterning.
  • Utilized hydrodynamic patterning with immunoaffinity for H1568 cells (93% efficiency).
  • Employed self-assembly via chemotaxis for neutrophil patterning (68% efficiency).

Main Results:

  • Demonstrated high patterning efficiencies and reproducibility with minimal secondary adhesion.
  • Visualized and quantified H1568 and neutrophil interactions within the microchannel.
  • Observed significant hindrance in neutrophil swarming when H1568 cells were introduced.

Conclusions:

  • The microstamping platform enables precise, large-scale cell patterning for studying cell-cell interactions.
  • H1568 cells significantly impair neutrophil swarming, suggesting a role in immune evasion within the tumor microenvironment.
  • This technique provides insights into the non-small cell lung cancer tumor microenvironment and inflammatory mediator roles.