期刊
JOURNAL OF STEROID BIOCHEMISTRY AND MOLECULAR BIOLOGY
卷 174, 期 -, 页码 153-160出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jsbmb.2017.08.014
关键词
1 alpha,25-Dihydroxyvitamin D-3; Forkhead transcription factor 1; High glucose; Reactive oxygen species; Osteogenesis
资金
- National Natural Science Foundation of China [NSFC 81400543]
- Youth Scientific Foundation of Sichuan University [2014SCU11033]
Diabetes mellitus (DM) remarkably affects bone metabolism and causes multiple skeletal disorders, which are associated with the increased oxidative stress that activates Forkhead family of transcription factors (FoxOs). 1 alpha,25-Dihydroxy vitamin D-3 (1,25(OH)(2)D-3), the hormonally active form of vitamin D, plays a potential role in the prevention of glucose tolerance. However, its mechanism of action in high glucose-induced energy disorders remains unclear. In vitro study shows that 1,25(OH)(2)D-3 promotes osteogenesis in high glucose-induced oxidative stress mainly results from increased osteoblasts proliferation and decreased apoptosis. Cells treated with 1,25(OH)(2)D-3 exhibit an increased osteogenic differentiation capacity and an elevated level of osteogenic phenotype (ie. alkaline phosphatase, collagen 1, osteocalcin, and osteopontin). We also found that the effect of 1,25(OH)(2)D-3 on osteogenesis is achieved by FoxO1 inactivation and nuclear exclusion through PI3 K/Akt pathway in a time- and dose-dependent manner. Moreover, the diversion of beta-catenin from FoxOl- to Wnt/TCF4-mediated transcription was indirectly promoted by the inactivation of FoxOl. These data together reveals that the activated Wnt/beta-catenin signaling is involved in the regulatory action of 1,25(OH)(2)D-3 on osteogenesis in oxidative stress. This study also provides a novel understanding of the effect of 1,25(OH)(2)D-3 on skeleton in oxidative stress condition.
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