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http://dx.doi.org/10.3746/jkfn.2005.34.9.1350

Effect of Isoflavone Supplementation on Bone Metabolism in Ovariectomized Rats at Different Ages  

Byun, Jae-Soon (Dept. of Food and Nutrition, Chungang University)
Rho, Sook-Nyung (Dept. of Food and Nutrition, Chungang University)
Park, Jong-Seong (Laboratory Animal Research Center, Samsung Biomedical Research Institute)
Park, Hyoung-Moo (Dept. of Obstetrics & Gynecology, Yongsan Hospital College of Medicine, Chungang University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.34, no.9, 2005 , pp. 1350-1356 More about this Journal
Abstract
Osteoporosis that is associated with estrogen deficiency in menopause is by far the most common cause of age-related bone loss. Since isoflavone had been reported as a natural substance that minimizes bone loss, we have begun this study to examine the effect of the substance on bone metabolism in ovariectomized rats. Five week-old (n=22) and 25 week-old (n=22) Sprage-Dawley female rats were classified into young (Y) and adult (A) groups. Each group consisted of three subgroups : sham operated group (SH), ovariectomized group (OVX), and isoflavone supplemented group (OVX+ISO 80 mg/kg B.W.). They were fed chow for 9 weeks. The result showed that body weight gain was increased in YOVX in comparison to YSH group, (p<0.05) serum osteocalcin concentration and urinal deoxypyridinoline (DPD) excretion had significantly increased in YOVX more than in YSH group, and significantly decrease in OVX+ISO than in YOVX group (p<0.05). We concluded that soy isoflavones may decrease bone turnover in young rats. However, isoflavone supplement didn't show significant influence on bone metabolism of adult rats.
Keywords
isoflavone; bone density; ovariectomized rats; osteoporosis;
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