Article thumbnail

Surface mobility regulates skeletal stem cell differentiation

By C. Gonzalez-Garcia, D. Moratal, R.O.C. Oreffo, M.J. Dalby and M. Salmerón-Sánchez


A family of polymer substrates which consists of a vinyl backbone chain with the side groups –COO(CH2)xH, with x = 1, 2, 4, was prepared. Substrates with similar chemical groups but decreasing stiffness, characterized by their elastic modulus at 37 °C, as well as surface mobility, characterized by the glass transition temperature, were obtained. We have investigated whether these subtle variations in polymer chemistry lead to alterations in fibronectin (FN) adsorption and mesenchymal stem cell response. The same FN density was adsorbed on every substrate ([similar]450 ng cm−2) although the supramolecular organization of the protein at the material interface, as obtained with AFM, was different for x = 1 and the other two surfaces (x = 2, 4). Consequently, this allows one to investigate the effect of physical properties of the matrix on stem cell differentiation after ruling out any influence of protein activity. Cell adhesion was quantified by calculating the size distribution of focal adhesions. Mesenchymal stem cell differentiation to the osteoblastic lineage was determined by quantifying protein levels for osteocalcin, osteopontin and Runx2, in the absence of any additional osteogenic soluble factors in the culture media, but as a direct effect of material properties. The findings indicate the potential to modulate skeletal progenitor cell commitment to the osteoblastic lineage through surface mobility of the underlying material surface

Publisher: 'Royal Society of Chemistry (RSC)'
Year: 2012
DOI identifier: 10.1039/c2ib00139j
OAI identifier:
Provided by: Enlighten
Sorry, our data provider has not provided any external links therefore we are unable to provide a link to the full text.

Suggested articles

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.