Regulation of osteogenic and chondrogenic differentiation of mesenchymal stem cells in PEG-ECM hydrogels

Nathaniel S. Hwang, Shyni Varghese, Hanwei Li, Jennifer Elisseeff

Research output: Contribution to journalArticle

Abstract

Bone-marrow-derived mesenchymal stem cells (MSCs) are candidates for regeneration applications in musculoskeletal tissue such as cartilage and bone. Various soluble factors in the form of growth factors and cytokines have been widely studied for directing the chondrogenic and osteogenic differentiation of MSCs, but little is known about the way that the composition of extracellular matrix (ECM) components in three-dimensional microenvironments plays a role in regulating the differentiation of MSCs. To define whether ECM components influence the regulation of osteogenic and chondrogenic differentiation by MSCs, we encapsulated MSCs in poly-(ethylene glycol)-based (PEG-based) hydrogels containing exogenous type I collagen, type II collagen, or hyaluronic acids (HA) and cultured them for up to 6 weeks in chondrogenic medium containing transforming growth factor-β1 (10 ng/ml) or osteogenic medium. Actin cytoskeleton organization and cellular morphology were strongly dependent on which ECM components were added to the PEG-based hydrogels. Additionally, chondrogenic differentiation of MSCs was marginally enhanced in collagen-matrix-based hydrogels, whereas osteogenic differentiation, as measured by calcium accumulation, was induced in HA-containing hydrogels. Thus, the microenvironments created by exogenous ECM components seem to modulate the fate of MSC differentiation.

Original languageEnglish (US)
Pages (from-to)499-509
Number of pages11
JournalCell and Tissue Research
Volume344
Issue number3
DOIs
StatePublished - Jun 2011

Keywords

  • Chondrogenesis
  • Extracellular microenvironment
  • Goat
  • Hyaluronic acids
  • Mesenchymal stem cells
  • Osteogenesis
  • Type I collagen
  • Type II collagen

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Histology
  • Cell Biology

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