The Effects of Dexamethasone, Ascorbic Acid, and β-Glycerophosphate on Osteoblastic Differentiation by Regulating Estrogen Receptor and Osteopontin Expression

被引:59
|
作者
Park, Jun-Beom [1 ]
机构
[1] Seoul Natl Univ, Dept Mol Med & Biopharmaceut Sci, Grad Sch Convergence Sci & Technol, Seoul, South Korea
关键词
ascorbic acid; beta-glycerophosphate; dexamethasone; differentiation; mineralization; osteoblast; CELLS; FABRICATION;
D O I
10.1016/j.jss.2010.09.010
中图分类号
R61 [外科手术学];
学科分类号
摘要
Background. Ascorbic acid (AA), beta-glycerophosphate (GP), and dexamethasone (DEX) are the compounds known to favor the expression of the osteoblastic phenotype in several bone cell systems. Materials and Methods. In this report, the combination effects of differentiation agents on osteoprecursor cells were evaluated. The effect on cell proliferation was determined by a cell viability test with morphologic analysis. Differentiation and mineralization were evaluated using an alkaline phosphatase activity test and alizarin red-S staining. Protein expressions related to bone formation, such as transforming growth factor-beta (TGF-beta), estrogen receptor-alpha (ER-alpha), and osteopontin (OPN) were evaluated by using a Western blot analysis. Results and Conclusion. AA and GP provided an inductive effect for differentiation of osteoprecusor cells, while short-term application of DEX seemed to lead to a dose-dependent increase of cellular differentiation. Long-term use of DEX seemed to reduce mineralization. These effects mayseem to be regulated by the expression of ER-alpha, OPN, and TGF-beta. Further studies related to this mechanism within the in vivo model may be necessary to ascertain greater detail. (C) 2012 Elsevier Inc. All rights reserved.
引用
收藏
页码:99 / 104
页数:6
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