Osteogenesis of human mesenchymal stem cells on micro-patterned surfaces

J Biomater Appl. 2013 Mar;27(7):862-71. doi: 10.1177/0885328211428094. Epub 2011 Nov 15.

Abstract

Osteogenic responses of human mesenchymal stromal cells (hMSCs) were compared on square-patterned, inverse square-patterned, and planar titanium, chromium, diamond-like carbon (DLC), and tantalum; hypothesis was that both the materials and patterns affect osteogenesis. Samples were produced using photolithography and physical vapor deposition. Early-marker alkaline phosphatase (ALP) and mid-markers, small body size and mothers against decapentaplegic-related protein-1 (SMAD1), runt-related transcription factor-2 (RUNX2), and osteopontin were studied using quantitative real-time polymerase chain reaction. ALP and hydroxyapatite, were colorimetrically studied. ALP reached highest values on both patterned titanium samples, but mid-markers disclosed that it was already lagging behind planar and inverse patterned tantalum. Hydroxyapatite formation disclosed that osteo-induced hMSCs passed all the differentiation stages (except on planar chromium). Presence of hydroxyapatite disclosed that both types of patterning promoted (p < 0.001) osteogenesis compared to planar samples. Results suggest that the osseocompatibility/integration of implants could be improved by changing the monotonous and featureless implant-host interface into micro-patterned interface to provide physical differentiation cues.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alkaline Phosphatase / metabolism
  • Biocompatible Materials / chemistry*
  • Biocompatible Materials / metabolism
  • Carbon / chemistry*
  • Carbon / metabolism
  • Cell Differentiation
  • Cell Line
  • Chromium / chemistry*
  • Chromium / metabolism
  • Humans
  • Mesenchymal Stem Cells / cytology*
  • Mesenchymal Stem Cells / drug effects
  • Mesenchymal Stem Cells / metabolism
  • Osteogenesis / drug effects*
  • Surface Properties
  • Tantalum / chemistry*
  • Tantalum / metabolism
  • Titanium / chemistry*
  • Titanium / metabolism

Substances

  • Biocompatible Materials
  • Chromium
  • Tantalum
  • Carbon
  • Titanium
  • Alkaline Phosphatase