Laser-engineered topography: correlation between structure dimensions and cell control

J Mater Sci Mater Med. 2012 Nov;23(11):2813-9. doi: 10.1007/s10856-012-4737-9. Epub 2012 Aug 10.

Abstract

Topographical cues have a significant impact on cell responses and by this means, on the fabrication of innovative implant materials. However, analysis of cell-topography interactions in dependence of the surface feature dimensions is still challenging due to limitations in the fabrication technology. Here, we introduce surface structuring via picosecond laser systems, which enable a fast production of micro-sized topologies. Changes in the processing parameters further control the feature sizes of so-called spikes. Using surfaces with big and small spike-to-spike-distances for comparisons, we focussed on cell adhesion via extracellular matrix adsorption and focal adhesion complexes, morphology, localisation and proliferation of fibroblasts. The observed cell control was dependent on a turnover point related to the structure dimensions: only big spike-to-spike-distances reduced cell behaviour. Therefore, this technology offers a platform to study cell and tissue interactions with a defined microenvironment.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adsorption
  • Cell Adhesion*
  • Cells, Cultured
  • Enzyme-Linked Immunosorbent Assay
  • Extracellular Matrix / metabolism
  • Fibronectins / metabolism
  • Lasers*
  • Microscopy, Electron, Scanning
  • Surface Properties
  • Tissue Scaffolds

Substances

  • Fibronectins