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- W2075588585 abstract "In most developing countries, 70-80% of the population still resort to traditional medicine for their primary health care. This medicine utilises medicinal plants which are traditionally taken as concoction and infusion. The root and stem bark of Millettia griffoniana (Leguminosae), has been reported to contain isoflavonoids, alkaloids, and diterpenoids. The possible benefit of some bioactive isoflavones derived from M. griffoniana prompted us to screen them for estrogenic activity. Six isoflavones and coumarin derived from M. griffoniana (bail) namely, compound nos. 1-6 (Fig. 1) were tested for their potential estrogenic activities in three different estrogen receptor alpha (ERalpha)-dependent assays. In a yeast-based ERalpha assay, all test substances and 17beta-estradiol as endogenous agonist, showed a significant induction of beta-galactosidase activity. The test compounds at the concentration of 5 x 10(-6) M could achieve 59-121% of the beta-galactosidase induction obtained with 10(-8) M 17beta-estradiol (100%). In the reporter gene assay based on stably transfected MCF-7 cells (MVLN cells), the estrogen responsive induction of luciferase was also stimulated by the M. griffoniana isoflavones. In Ishikawa cells, all substances exhibited estrogenic activity revealed by the induction of alkaline phosphatase (AlkP) activity. The estrogenic activities of isoflavones from M. griffoniana could be completely suppressed by the pure estrogen antagonist, ICI 182,780, suggesting that the compounds exert their activities through ERalpha. Although all substances showed estrogenic effects, 4'-methoxy-7-O-[(E)-3-methyl-7-hydroxymethyl-2,6-octadienyl]isoflavone (7-O-DHF), Griffonianone C (GRIF-C), and 3',4'-dihydroxy-7-O-[(E)-3,7-dimethyl-2,6-octadienyl]isoflavone (7-O-GISO) were found to be the most potent of tested substances. In summary, estrogenic activities of the isoflavones derived from M. griffoniana were described for the first time using reporter gene assays and the estrogen-inducible AlkP Ishikawa model." @default.
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- W2075588585 date "2006-02-01" @default.
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- W2075588585 title "Estrogenic properties of isoflavones derived from Millettia griffoniana" @default.
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- W2075588585 doi "https://doi.org/10.1016/j.phymed.2005.06.003" @default.
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