期刊
PHYTOMEDICINE
卷 21, 期 3, 页码 217-224出版社
ELSEVIER GMBH
DOI: 10.1016/j.phymed.2013.08.026
关键词
Flavane; Osteoporosis; Oxidative stress; Green tea
资金
- Science & Technology Innovation Fund of Guangdong Medical College [STIF 201104]
- National Natural Science Foundation of China [NSFC 81273518]
Epidemiological evidence has shown an association between tea consumption and the prevention of bone loss in the elderly. Previous studies indicated that green tea exerted osteoprotective effect in vivo. This study aims to investigate the constituents in Huangshan Maofeng tea and systemically evaluate their antioxidative and osteogenic effects in vitro. Five flavanes, isolated from Huangshan Maofeng tea, showed effects on proliferation of osteoblastic cells and ameliorated H2O2-induced C2C12 mouse myoblast cell apoptosis at 3.125-50 mu g/ml. (-)-Epicatechin observably increased alkaline phosphatase (ALP) activity and hydroxyproline content. (-)-Epiafzelechin at 25 mu g/ml significantly increased the area of mineralized bone nodules. The activities of flavanes in promoting osteblastic proliferation and differentiation are positively correlated with activities in protecting against apoptosis in C2C12 cells. It indicates that anti-osteoporosis effect of these flavanes may be linked to their antioxidative activity. The observed effects of these flavanes suggest that these flavanes may have beneficial effects on bone health. (C) 2013 Published by Elsevier GmbH.
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