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  • Title: Abeliophyllum distichum Nakai alleviates postmenopausal osteoporosis in ovariectomized rats and prevents RANKL-induced osteoclastogenesis in vitro.
    Author: Kim EY, Kim JH, Kim M, Park JH, Sohn Y, Jung HS.
    Journal: J Ethnopharmacol; 2020 Jul 15; 257():112828. PubMed ID: 32268206.
    Abstract:
    ETHNOPHARMACOLOGICAL RELEVANCE: Abeliophyllum distichum Nakai (AD), called Miseon, is one of Korea's monotypic endemic species. As a folk remedy, the AD has been used to treat inflammatory disease, stomachaches, diarrhea, and gynecologic disease in Korea. Some researchers have reported that the AD has anti-cancer, anti-inflammatory, and anti-oxidant effects. But the protective effect of AD leaf for osteoporosis has not been reported yet. AIM OF THE STUDY: This study aimed to analyze the effects and mechanism of AD-ethyl acetate fraction (EA) extract on the osteoporosis, one of the gynecologic disease. MATERIALS AND METHODS: The RAW 264.7 cells were used as a model for RANKL-induced osteoclastogenesis. We measured the TRAcP activity, expressions of NFATc1, c-fos, and MAPK to investigate the effect of AD-EA. OVX-induced osteoporosis rat model was used as menopausal osteoporosis. After both ovaries were removed through a surgical procedure, and AD-EA or 17b-estradiol was orally administered for 8 weeks. BMD of femurs was measured as well as the bone morphometric parameter, such as BV/TV, trabecular thickness, number and surface using a micro CT. RESULTS: AD-EA significantly inhibited TRAcP activity, actin ring formation, pit formation and the expressions of osteoclast-related genes in a dose-dependent manner through the inhibition of the MAPK and c-fos/NFATc1 pathway. In addition, low dose administration of AD-EA improved the deterioration of trabecular bone microarchitecture caused by OVX through the inhibition of bone resorption by TRAcP and CTK. CONCLUSIONS: These results suggest that AD-EA may contribute to the therapy of osteoporosis caused by menopause in women.
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