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Magnetophoretic Sorting of Single Cell-Containing Microdroplets.

Younggeun Jo1, Fengshan Shen2, Young Ki Hahn3

  • 1Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea. ygjo@kaist.ac.kr.

Micromachines
|November 9, 2018
PubMed
Summary
This summary is machine-generated.

This study presents a magnetophoretic method for high-purity single-cell sorting in droplet microfluidics. The technique efficiently separates droplets containing single cells from those without, improving single-cell analysis.

Keywords:
Thalassiosira eccentricamagnetic nanoparticlesmagnetophoresisseparationsingle cell

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Area of Science:

  • Biotechnology
  • Microfluidics
  • Cell Biology

Background:

  • Droplet microfluidics offers a powerful platform for single-cell analysis by compartmentalizing cells in small volumes.
  • A significant challenge in droplet microfluidics for single-cell analysis is the low ratio of droplets containing single cells, hindering efficiency.

Purpose of the Study:

  • To develop a simple, robust, and highly pure single-cell sorting platform utilizing droplet microfluidics and magnetophoresis.
  • To overcome the limitations of low single-cell encapsulation ratios in microfluidic systems.

Main Methods:

  • The platform employs monodisperse magnetic nanoparticles (MNPs) within droplets for magnetophoretic separation.
  • Droplets containing single cells exhibit a reduced MNP concentration due to cell volume displacement, leading to a lower magnetic force compared to cell-free droplets.

Main Results:

  • Achieved a single-cell sorting purity exceeding 94%.
  • Demonstrated effective separation of single cell-encapsulated droplets from cell-free droplets based on differential magnetic force.
  • The system utilizes a simple permanent magnet, eliminating the need for complex apparatus.

Conclusions:

  • The developed magnetophoretic droplet microfluidic platform provides an effective and convenient method for high-purity single-cell sorting.
  • This technology has the potential for seamless integration into advanced single-cell analysis systems.