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논문 기본 정보

자료유형
학술저널
저자정보
Oh, Seung-Min (College of Pharmacy, Sungkyunkwan University) Kim, Ha-Ryong (College of Pharmacy, Sungkyunkwan University) Chung, Kyu-Hyuck (College of Pharmacy, Sungkyunkwan University)
저널정보
대한약학회 Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea 제31권 제2호
발행연도
2008.1
수록면
216 - 224 (9page)

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Ginkgo biloba extract (GBE) has a selective estrogen receptor modulator (SERM)-like biphasic effect on estrogen, and could be a potential alternative to hormone replacement therapy (HRT). Here, we investigated whether GBE can ameliorate estrogen-depleted osteoporosis in in vitro osteoblast cells and in estrogen-deprived ovariectomized (OVX) rats, a classical animal model for postmenopausal osteoporosis. GBE (50-150 ${\mu}g/mL$) significantly increased ALP (Alkaline phosphatase) activity of osteoblast cells, indicating that GBE promotes osteoblast mineralization. OVX rats exposed to GBE (100 and 200 mg/kg/day, oral treatment), raloxifene (3 mg/kg/day, oral treatment) or estradiol ($E_2,\;10\;{\mu}g/kg/day$, subcutaneous injection) decreased osteoclast resorptive activity compared with OVX rats. GBE and raloxifene did not increase uterine weight compared with OVX rats, while $E_2$ and Sham control did, suggesting that GBE has no uterotrophic activity, which is a disadvantage of estrogen therapy. In OVX rats, GBE did not restore severe bone density loss induced by OVX, indicating that GBE may be insufficient as therapeutic material for severe osteoporosis. However, despite its no effects on bone density loss in OVX rats, GBE did stimulate osteoblast differentiation and antiosteoclastic activity in vitro. Therefore, GBE may have preventive potential on osteoporosis as do other phytoestrogens.

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