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Scaling Effects on Single-Cell Manipulation Using Magnetic Forces at Edge of Flat Plate With Elliptically

Satoshi Ota1, Hiroki Yasuga2, Takeshi Akagawa3

  • 1Department of Electrical and Electronic Engineering, Shizuoka University, Hamamatsu, Japan.

Biotechnology and Bioengineering
|September 2, 2025
PubMed
Summary
This summary is machine-generated.

This study demonstrates precise single-cell manipulation at the edge of microfabricated plates using magnetic nanoparticles and magnetic fields. This novel method overcomes limitations of conventional techniques, enabling advanced cellular analyses.

Keywords:
magnetic forcemagnetic nanoparticlesmicrofabricated flat platesingle‐cell manipulationsurface tension

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Area of Science:

  • Biotechnology
  • Microfluidics
  • Cell Biology

Background:

  • Conventional single-cell manipulation is limited to the center of culture devices.
  • Surface tension at the edge of culture plates impedes cell manipulation.
  • A need exists for versatile single-cell manipulation methods applicable to various device geometries.

Purpose of the Study:

  • To develop a novel method for single-cell manipulation at the edge of microfabricated plates.
  • To investigate the influence of projection geometry on cell motion under magnetic force and surface tension.
  • To establish design guidelines for microfabricated structures enabling precise cell manipulation.

Main Methods:

  • Single cells were labeled with magnetic nanoparticles.
  • Cell manipulation was performed at the edge of projecting microfabricated plates using an external magnetic field.
  • The effects of projection shape and scale on cell motion were analyzed, considering surface tension and magnetic forces.

Main Results:

  • Successful manipulation of single cells at the edge of projecting microfabricated plates was achieved.
  • Design guidelines for projections were derived based on energy minimization principles governing liquid-air and solid-liquid interfaces.
  • The study demonstrated accurate single-cell manipulation on plates with varying projection shapes.

Conclusions:

  • This technique offers a less invasive and more versatile approach to single-cell manipulation, not restricted by culture device shape.
  • The findings contribute to the advancement of single-cell analyses, including applications like single-cell-based polymerase chain reactions.
  • The developed design guidelines facilitate the creation of optimized microfabricated structures for enhanced cell manipulation.