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Acta Biomater. 2013 Dec;9(12):9547-57. doi: 10.1016/j.actbio.2013.07.027. Epub 2013 Jul 31.

A novel strontium(II)-modified calcium phosphate bone cement stimulates human-bone-marrow-derived mesenchymal stem cell proliferation and osteogenic differentiation in vitro.

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  • 1Centre for Translational Bone, Joint and Soft Tissue Research, Medical Faculty and University Hospital, Technische Universit√§t Dresden, Dresden, Germany.


In the present study, the in vitro effects of novel strontium-modified calcium phosphate bone cements (SrCPCs), prepared using two different approaches on human-bone-marrow-derived mesenchymal stem cells (hMSCs), were evaluated. Strontium ions, known to stimulate bone formation and therefore already used in systemic osteoporosis therapy, were incorporated into a hydroxyapatite-forming calcium phosphate bone cement via two simple approaches: incorporation of strontium carbonate crystals and substitution of Ca(2+) by Sr(2+) ions during cement setting. All modified cements released 0.03-0.07 mM Sr(2+) under in vitro conditions, concentrations that were shown not to impair the proliferation or osteogenic differentiation of hMSCs. Furthermore, strontium modification led to a reduced medium acidification and Ca(2+) depletion in comparison to the standard calcium phosphate cement. In indirect and direct cell culture experiments with the novel SrCPCs significantly enhanced cell proliferation and differentiation were observed. In conclusion, the SrCPCs described here could be beneficial for the local treatment of defects, especially in the osteoporotic bone.

Copyright © 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.


Calcium phosphate bone cement; Cell biological evaluation; Human mesenchymal stem cells; Osteoblasts; Strontium

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