, Volume 38, Issue 3, pp 640-648

Effects of Hydroxyapatite and Biostite® on Osteogenic Induction of hMSC

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Abstract

When isolated from the iliac crest human mesenchymal stem cells (hMSC) differentiate into osteoblast-like cells with appropriate stimulation in culture. This in vitro study tested the hypothesis that Biostite® and hydroxyapatite (HA) affect proliferation and differentiation of hMSC into osteoblastic cells. Cell proliferation was determined by measuring 3H-thymidine incorporation into DNA and typical markers of osteoblastic phenotype were determined by RT-PCR assay. No differences emerged in cell proliferation cultures with Biostite® or hydroxyapatite (HA), but gene expression analysis revealed higher expression of collagen, alkaline phosphatase (ALP), osteopontin and bone sialoprotein (BSP) in the presence of Biostite®. TGFβ2 production, as assessed by an Elisa kit, and Runx2 expression by RT-PCR, were greater in Biostite cultures, suggesting Biostite® provides a better environment for hMSC differentiation into osteoblasts and is, potentially, a more promising bone-filling material than HA.

Associate Editor Larry V. McIntire oversaw the review of this article.