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Cell type specific adhesion to surfaces functionalised by amine plasma polymers.

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Area of Science:

  • Biomaterials Science
  • Cell Biology
  • Surface Chemistry

Background:

  • Previous studies showed increased C2C12 myoblast adhesion to amine plasma polymers (PPs).
  • Further investigation is needed to understand cell behavior on various amine PPs.

Purpose of the Study:

  • To investigate cell resistance to trypsinization, proliferation, motility, and attachment rates.
  • To evaluate fibroblast (LF), keratinocytes (HaCaT), smooth muscle cells (VSMC), and endothelial cells (HUVEC, HSVEC, CPAE) on three amine PPs.
  • To elucidate the mechanism behind enhanced cell adhesion on amine PPs.

Main Methods:

  • Cell culture and standard assays for proliferation, motility, and attachment.
  • Trypsinization resistance assays.
  • Single-cell force spectroscopy.
  • Surface characterization of amine PPs.

Main Results:

  • Non-endothelial cells (LF, HaCaT, VSMC) showed significantly higher resistance to trypsinization compared to endothelial cells.
  • Increased trypsin resistance correlated with a higher attachment rate for non-endothelial cells.
  • Cell adhesion and trypsin resistance were independent of serum presence, suggesting non-specific interactions.
  • Single-cell force spectroscopy and attachment rate confirmed differences among PPs with varying amine group densities.

Conclusions:

  • Amine PPs enhance non-specific cell adhesion, likely via electrostatic interactions between cells and amine groups.
  • The observed effects are distinct from receptor-mediated adhesion involving serum proteins.
  • Amine PPs show potential for applications requiring robust cell attachment and resistance.