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http://dx.doi.org/10.3746/jkfn.2008.37.12.1560

Effect of Green Tea Products on Bone Metabolism Marker in Ovariectomized Rats with High Cholesterol Diet Intake  

Noh, Kyung-Hee (BK21 Center of Smart Foods and Drugs, Food Science Institute, and Biohealth Product Research Center, Inje University)
Jang, Ji-Hyun (BK21 Center of Smart Foods and Drugs, Food Science Institute, and Biohealth Product Research Center, Inje University)
Cho, Mi-Kyung (BK21 Center of Smart Foods and Drugs, Food Science Institute, and Biohealth Product Research Center, Inje University)
Song, Young-Sun (BK21 Center of Smart Foods and Drugs, Food Science Institute, and Biohealth Product Research Center, Inje University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.37, no.12, 2008 , pp. 1560-1567 More about this Journal
Abstract
This study was designed to evaluate the effect of green tea products (GTP) on bone metabolism marker in ovariectomized (OVX) rats fed high cholesterol diet. Forty Sprague-Dawley female rats, 10 weeks of age ($279{\pm}2g$), were divided into 4 groups and fed on the experimental diets for 6 weeks: sham operated control (Sham-C) and OVX-control (OVX-C) groups treated high cholesterol diet. OVX-GTP 5% (OVX-G5) and OVX-GTP 20% (OVX-G20) groups were treated with high cholesterol diet containing 5% GTP and 20% GTP, respectively. Food efficient ratio was significantly (p<0.05) lower in OVX-G20 than in the other OVX groups. Bone mineral density of femur was not significantly different among the experimental groups in the order of Sham-C>OVX-G5 and OVX-G20>OVX-C. Alkaline phosphatase activities on serum was lower in the GTP supplement groups than in the OVX-C. Estradiol levels of serum were higher in the GTP supplement groups than in the OVX-C. Osteocalcin levels of serum was the lowest in the OVX-G20. Deoxypyridinoline crosslink values of urine, indicator of bone absorption, was the lowest in the OVX-G20 group. The GTP supplemented groups had a lower bone resorption ratio than in the OVX-C group. From the above results, these findings suggest the possibility of using GTP as a functional food materials related to bone metabolism in menopause.
Keywords
green tea products; bone metabolism; ovariectomized rat; functional food;
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