A collagen-glycosaminoglycan scaffold supports adult rat mesenchymal stem cell differentiation along osteogenic and chondrogenic routes

Eric Farrell, Fergal J. O'Brien, Paul Doyle, Jan Fischer, Ionnais Yannas, Brendan A. Harley, Brian O'Connell, Patrick J. Prendergast, Veronica A. Campbell

Research output: Contribution to journalArticlepeer-review

Abstract

Adult mesenchymal stem cells have the proclivity to differentiate along multiple lineages giving rise to new bone, cartilage, muscle, or fat. Collagen, a normal constituent of bone, provides strength and structural stability and is therefore a potential candidate for use as a substrate on which to engineer bone and cartilage from their respective mesenchymal-derived precursors. In this study, a collagen-glycosaminoglycan scaffold was used to provide a suitable three-dimensional (3-D) environment on which to culture adult rat mesenchymal stem cells and induce differentiation along the osteogenic and chondrogenic lineages. The results demonstrate that adult rat mesenchymal stem cells can undergo osteogenesis when grown on the collagen-glycosaminoglycan scaffold and stimulated with osteogenic factors (dexamethasone, ascorbic acid, β-glycerophosphate), as evaluated by the temporal induction of the bone-specific proteins, collagen I and osteocalcin, and subsequent matrix mineralization. The osteogenic factors were coupled to activation of the extracellular-regulated protein kinase (ERK), and this kinase was found to play a role in the osteogenic process. As well as supporting osteogenesis, when the cell-seeded scaffold was exposed to chondrogenic factors (dexamethasone and TGF-1β), collagen II immunoreactivity was increased, providing evidence that the scaffold can also provide a suitable 3-D environment that supports chondrogenesis.

Original languageEnglish (US)
Pages (from-to)459-468
Number of pages10
JournalTissue Engineering
Volume12
Issue number3
DOIs
StatePublished - Mar 2006
Externally publishedYes

ASJC Scopus subject areas

  • Biotechnology
  • Biophysics
  • Cell Biology

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