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Updated: Sep 4, 2025

Nanotopology of Cell Adhesion upon Variable-Angle Total Internal Reflection Fluorescence Microscopy VA-TIRFM
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TiO2 Nanotopography-Driven Osteoblast Adhesion through Coulomb's Force Evolution.

Jiajun Luo1,2, Shudong Zhao1,3, Xiangsheng Gao1,4

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ACS Applied Materials & Interfaces
|July 22, 2022
PubMed
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Nanotopography on titanium (Ti) implants influences human osteoblast (HOb) cell behavior. Nanoconvex surfaces promote HOb adhesion and spreading by enhancing Coulomb

Keywords:
Ti implantcell adhesioncell−material interactionnanotopographyprotein adsorption

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Area of Science:

  • Biomaterials Science
  • Cell Biology
  • Surface Engineering

Background:

  • Nanotopography on titanium (Ti) substrates can regulate cellular behavior for improved orthopaedic implant performance.
  • The precise mechanisms governing cell-matrix interactions with nanotopography, particularly concerning cell adhesion, remain incompletely understood.

Purpose of the Study:

  • To investigate the interactive mechanisms between nanotopography and human osteoblast (HOb) cells to understand cell adhesion and spreading.
  • To develop and analyze novel nanotopographic features on Ti substrates for enhanced cellular responses.

Main Methods:

  • Fabrication of TiO2 nanotopographies including nanoflat, nanoconvex, and nanoconcave features on Ti substrates.
  • Estimation and comparative analysis of Coulomb's force evolution between extracellular matrix components and the nanotopographies.
  • Assessment of HOb adhesion, spreading, focal adhesion maturation, and actin cytoskeleton organization on different nanotopographies.

Main Results:

  • HOb cells demonstrated significantly greater adhesion and spreading on nanoconvex nanotopographic surfaces.
  • Cells on nanoconvex surfaces exhibited super-matured focal adhesions and a highly ordered actin cytoskeleton.
  • Coulomb's force evolution was more intense and concentrated on nanoconvex features compared to nanoconcave features, potentially leading to increased fibronectin distribution.

Conclusions:

  • Nanotopography, specifically nanoconvex features, plays a crucial role in modulating HOb cell adhesion and spreading.
  • The enhanced cellular response on nanoconvex surfaces is linked to the intensity and concentration of Coulomb's force, influencing extracellular matrix interactions.
  • This research provides valuable insights for designing novel Ti-based orthopaedic implants with improved surface characteristics for better in vivo performance.