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Nanotopographical Modulation of Cell Function through Nuclear Deformation.

Kai Wang1, Allison Bruce1, Ryan Mezan1

  • 1Department of Chemical Engineering, West Virginia University , Morgantown, West Virginia 26506, United States.

ACS Applied Materials & Interfaces
|February 5, 2016
PubMed
Summary
This summary is machine-generated.

Nanotopography influences cell behavior by altering focal adhesions and nuclear shape. This study reveals how nanotopography modulates cell functions like proliferation and collagen production through nuclear deformation.

Keywords:
cell spreadingfocal adhesionsnanotopographynuclear deformationproliferationtransfectiontype I collagen

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Area of Science:

  • Biomaterials Science
  • Cell Biology
  • Nanotechnology

Background:

  • Nanotopography regulates cell behavior, but mechanisms involving focal adhesions and nuclear response are unclear.
  • Current methods for nanotopography application are largely empirical.

Purpose of the Study:

  • To investigate how nanotopography, focal adhesions, and nuclear deformation influence cell phenotype and function.
  • To establish correlations between nuclear deformation and cell functions like proliferation and collagen production.

Main Methods:

  • Engineered nanotopographies (gratings, pillars) with varied dimensions (feature size, spacing, height).
  • Investigated cell spreading, focal adhesion organization, and nuclear deformation in human primary fibroblasts.
  • Examined cell proliferation, transfection, and type I collagen production.

Main Results:

  • Nanoscale gratings and pillars facilitated focal adhesion elongation and nuclear orientation.
  • Nanogratings oriented focal adhesions and nuclei based on feature size and spacing.
  • Discrete nanopillars had less effect on focal adhesions and nuclear deformation compared to gratings.
  • Nuclear volume was modulated by nanotopography height.
  • Cell proliferation, transfection, and collagen production correlated with nuclear volume.

Conclusions:

  • Nanotopography regulates cell phenotype and function by modulating nuclear deformation via focal adhesions.
  • The nucleus acts as a critical mechanosensor for cell regulation.
  • Provides insights for rational design of nanotopography in biomaterials and medical devices.