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자료유형
학술저널
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대한구강생물학회 International Journal of Oral Biology International Journal of Oral Biology 제38권 제3호
발행연도
2013.1
수록면
111 - 119 (9page)

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Objective. To investigate the effects of the hypoxia inducible factor-1 (HIF-1) activation–mimicking agent cobalt chloride (CoCl2) on the osteogenic differentiation of human mesenchymal stem cells (hMSCs) and elucidate the underlying molecular mechanisms. Study design. The dose and exposure periods for CoCl2 in hMSCs were optimized by cell viability assays. After confirmation of CoCl2-induced HIF-1α and vascular endothelial growth factor expression in these cells by RT-PCR, the effects of temporary preconditioning with CoCl2on hMSC osteogenic differentiation were evaluated by RTPCR analysis of osteogenic gene expression, an alkaline phosphatase (ALP) activity assay and by alizarin red S staining. Results. Variable CoCl2 dosages (up to 500 μM) and exposure times (up to 7 days) on hMSC had little effect on hMSC survival. After CoCl2 treatment of hMSCs at 100 μM for 24 or 48hours, followed by culture in osteogenic differentiating media, several osteogenic markers such as Runx-2, osteocalcin and osteopontin, bone sialoprotein mRNA expression level were found to be up-regulated. Moreover, ALP activity was increased in these treated cells in which an accelerated osteogenic capacity was also verified by alizarin red S staining. Conclusions. The osteogenic differentiation potential of hMSCs could be preserved and even enhanced by CoCl2 treatment.

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