Tanshinone prevents cancellous bone loss induced by ovariectomy in rats
Tanshinone prevents cancellous bone loss induced by ovariectomy in rats作者机构：四川大学 Chengdu 610041 Department of Pharmacology Guangdong Medical College Zhanjiang 524023 Department of Pharmacology Guangdong Medical College Zhanjing 524023 Guangdong Medical College Guangdong Key Laboratory for Research and Development of Natural Drugs Zhanjiang 524023
出 版 物：《Acta Pharmacologica Sinica》 (中国药理学报(英文版))
年 卷 期：2004年第25卷第5期
页 面：136-142页
核心收录：
学科分类：1007[医学-药学(可授医学、理学学位)] 1006[医学-中西医结合] 1002[医学-临床医学] 10[医学] 100602[医学-中西医结合临床]
基 金：Project supported by the Guangdong Natural Science Founda-tion No 020554.
主 题：tanshinone cryptotanshinone 2-fluoro-17alpha-ethynylestradiol ovariectomy bone and bones osteoclasts osteoporosis histocytochemistry morphology
摘 要：AIM: To investigate the skeletal effects of total tanshinone in ovariectomized rats by analyzing cancellous bonehistomorphometry of fourth lumbar vertebrae (LV4) and proximal tibial metaphyses (PTM). METHODS: Four-month-old Sprague-Dawley female rats were sham-operated and treated with vehicle or ovariectomized and treatedwith either vehicle, total tanshinone (200 mgkg-1d-1, equivalent to 35 gkg-1d-1 of tanshinone II A and 16 mgkg -1d-1 ofcryptotanshinone), or 17a-ethynylestradiol (30 gkg-1d-1 as positive treatment group) starting one day post-sur-gery for 10 weeks. Double in vivo fluorochrome labeling was administered to all rats. The undecalcified longitu-dinal LV4 and PTM sections were cut and stained with Goldners Trichrome (4-m thickness) or unstained (8-mthickness) for the bone histomorphometric analysis. RESULTS: A significant decrease in trabecular bone volume(BV/TV) and trabecular number (Tb.N) and a significant increase in osteoclast surface (OCS/BS) and mineralizingsurface (MS/BS) were found in both LV and PTM of vehicle-treated OVX rats compared with sham controls.Tanshinone completely prevented the decreases in BV/TV and Tb.N and the increase in OCS/BS in the LV4, andpartially prevented the decreases in BV/TV and Tb.N in the PTM of OVX rats. In addition, tanshinone increasedtrabecular thickness (Tb.Th) whereas it did not alter MS/BS. Moreover, tanshinone had no effect on uterine weightand body weight of OVX rats. Estrogen treatment increased BV/TV and Tb.N and decreased OCS/BS, but, alsomarkedly decreased MS/BS and increased uterine weight in OVX rats. CONCLUSION: The current study demon-strated that the adequate supply of tanshinone prevented OVX-induced cancellous bone loss in rats through inhibi-tion of elevated bone resorption.
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