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Substrate curvature regulates cell migration.

Xiuxiu He1, Yi Jiang

  • 1Department of Mathematics and Statistics, Georgia State University, Atlanta, GA, United States of America.

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|May 24, 2017
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Summary
This summary is machine-generated.

Cell migration is regulated by substrate curvature. Cells migrate more persistently on concave surfaces due to geometric constraints that bias protrusion force direction, offering a novel biomechanical explanation for this phenomenon.

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Area of Science:

  • Cell Biology
  • Biophysics
  • Mechanobiology

Background:

  • Cell migration is a fundamental biological process crucial for development and disease.
  • Substrate topography, including curvature, significantly influences cell motility.
  • Understanding the biomechanical basis of how cells respond to topographical cues is essential.

Purpose of the Study:

  • To investigate the effect of micrometer-scale substrate curvature on single-cell migration.
  • To develop a biomechanical model explaining the regulation of cell motility by curved surfaces.
  • To elucidate the relationship between cell shape, protrusion force, and migration persistence on varied curvatures.

Main Methods:

  • Development of a 3D mechanical model for single-cell migration simulation.
  • Simulation of cell migration on substrates with varying degrees of concave and convex curvature.
  • Analytical calculation of cell shape and protrusion force on curved substrates.

Main Results:

  • Cell migration exhibits greater persistence on concave surfaces compared to convex surfaces.
  • Cells spread more extensively on convex surfaces than on concave surfaces.
  • The magnitude of protrusion force in the direction of migration is higher on concave surfaces.

Conclusions:

  • Substrate curvature at the micrometer scale directly impacts cell migration persistence.
  • Geometric constraints imposed by curved substrates bias the direction of cellular protrusion forces.
  • This study provides a novel biomechanical explanation for how substrate geometry regulates cell motility and persistence.