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Title: Culture media conditioned by heat-shocked osteoblasts enhances the osteogenesis of bone marrow-derived mesenchymal stromal cells
Authors: Chao, P.Y.
Boon, C.H. 
Liu, H. 
Wei, S.T. 
Cao, T. 
Keywords: Conditioned media
Heat shock
Stromal cells
Issue Date: May-2007
Citation: Chao, P.Y., Boon, C.H., Liu, H., Wei, S.T., Cao, T. (2007-05). Culture media conditioned by heat-shocked osteoblasts enhances the osteogenesis of bone marrow-derived mesenchymal stromal cells. Cell Biochemistry and Function 25 (3) : 267-276. ScholarBank@NUS Repository.
Abstract: Osteogenic cells differentiated from bone marrow-derived mesenchymal stromal cells (MSC) hold much promise in bone tissue engineering and reconstructive surgery. There is a dire need for well-defined and efficient protocols to promote the osteogenesis of ex vivo cultured MSC. Hence, this study investigated whether a combination of chemical stimuli (ascorbic acid, beta-glycerophosphate and dexamethasone) and culture media conditioned by a human foetal osteoblast cell line (hFOB) had any synergistic effect on the osteogenesis of MSC. Conditioned media with or without prior heat shock treatment (42°C for 1 h) of the hFOB cell line, were collected and tested on rabbit MSC cultures, in the presence and absence of chemical stimuli. Osteogenic differentiation of MSC was assessed on both day 14 and 21 of ex vivo culture. The results showed conclusively that conditioned media promoted osteogenesis of MSC, which was further enhanced by prior heat shock-treatment of the hFOB cells, as well as by the presence of chemical stimuli. Among all experimental groups, the combination of culture medium conditioned by heat shocked hFOB cells together with chemical stimuli, exhibited the highest level of calcium mineralization, as assessed by Von Kossa staining. This provides clear evidence of a synergistic effect of conditioned media, heat shock and chemical stimuli. It is hoped that the data may contribute to the development of a more well-defined and efficient in vitro culture protocol to promote the osteogenesis of MSC for both clinical and non-clinical applications. Copyright © 2006 John Wiley & Sons, Ltd.
Source Title: Cell Biochemistry and Function
ISSN: 02636484
DOI: 10.1002/cbf.1330
Appears in Collections:Staff Publications

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