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http://dx.doi.org/10.5352/JLS.2013.23.9.1155

The Effects of Seaweed Gongjindan on Estrogen like Activities, Platelet Aggregation and Serum Lipid Levels in Ovariectomized Rats  

Jeon, Myeongjeong (Department Food and Nutrition, Silla University)
Kim, Seoyeon (Department Food and Nutrition, Silla University)
Kim, Bo-Kyung (Department Food and Nutrition, Silla University)
Cheon, Jihyeon (Department Food and Nutrition, Silla University)
Park, Seong-Hwan (Department of Pharmaceutical Engineering, Silla University)
Oh, Eunjin (Korea Traditional Food & Medicine, Pukyeong National University)
Lee, Sang-Hyeon (Department of Pharmaceutical Engineering, Silla University)
Kim, Mihyang (Department Food and Nutrition, Silla University)
Publication Information
Journal of Life Science / v.23, no.9, 2013 , pp. 1155-1162 More about this Journal
Abstract
Estrogen like activities were evaluated using ethanol and hot water extracts of gongjindan (GJD) and 3 types of brown algae by an in vitro detection system. Laminaria japonica and Undaria pinnatifida represented statistically significant (p<0.001) estrogen like activities, while GJD and Ecklonia stolonifera did not. Furthermore, activities of hot water extracts ($500{\mu}g/ml$) of Laminaria japonica and three mixture (Ecklonia stolonifera : Undaria pinnatifida : Laminaria japonica, 1: 1: 1) were stronger than that of $10^{-7}M$ $17{\beta}$-estradiol. These results suggest that Laminaria japonica contain estrogen like compounds. Based on these results, the prepared seaweed GJD were used for animal experiments about the effects on inhibition of platelet aggregation and serum lipid levels in ovariectomized rats. 9-week Old female SD-rats were randomly assigned to 3 groups as sham-operated rats, ovariectomized rats and ovariectomized rats that were treated with GJD. The rats were placed on prescribed diets for 5 weeks following ovariectomy. Total cholesterol and triglyceride contents on serum decreased in the SHAM group compared to the OVX-CON group. 5 weeks feeding of GJD resulted in significant lowering of triglyceride and a decreasing tendency of total cholesterol level. The level of HDL-cholesterol on serum increased significantly by feeding diets containing the GJD. The ability of platelet aggregation of group treated with GJD was less than that of the OVX-CON group. These results suggest that the beneficial effects of seaweed gongjindan may be used to improve menopausal syndrome.
Keywords
Seaweed gongjindan; estrogen like activities; platelet aggregation; serum lipids; ovariectomized rats;
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