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Blood Cell Separation Using Polypropylene-Based Microfluidic Devices Based on Deterministic Lateral Displacement.

Koji Matsuura1, Koji Takata2

  • 1Department of Bioscience, Faculty of Life Science, Okayama University of Science, Okayama 700-0005, Japan.

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Summary

This study introduces microfluidic deterministic lateral displacement (DLD) devices for separating mammalian blood cells, offering a new method for diagnosing and treating diseases in animals and humans.

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blood cell separationdeterministic lateral displacementmicroscopic analysis of blood cellspolypropylene-based microfluidic device

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Area of Science:

  • Biomedical Engineering
  • Microfluidics
  • Cell Separation Technology

Background:

  • Mammalian blood cell separation is crucial for disease diagnosis and treatment.
  • Microfluidic deterministic lateral displacement (DLD) devices offer label-free cell sorting based on particle diameter.
  • Existing methods may require electric devices or lack efficiency.

Purpose of the Study:

  • To develop and evaluate microfluidic DLD devices for separating bovine and human blood cells.
  • To determine the critical cut-off diameter (Dc) of the developed DLD devices.
  • To assess the potential clinical applicability of these devices.

Main Methods:

  • Fabrication of microfluidic DLD devices using a poly(propylene)-based resin.
  • Utilized immunobeads (1-20 μm) to determine the critical cut-off diameter (Dc).
  • Performed blood cell separation experiments on diluted whole bovine and human blood.

Main Results:

  • Experimental Dc values for immunobeads closely matched calculated values (8-10 μm).
  • Successfully separated lymphocytes and neutrophils from diluted whole bovine blood.
  • Demonstrated separation of human neutrophils and partial separation of lymphocytes, with occasional human red blood cells observed.

Conclusions:

  • Microfluidic DLD devices made from poly(propylene)-based resin can separate mammalian blood cells without electric devices.
  • The devices show potential for clinical applications in animal and human disease diagnosis and treatment.
  • Further microfluidic channel optimization is needed for enhanced cell concentration.