02081nas a2200217 4500008004100000245009900041210006900140260001400209300001200223490000600235520137500241653002401616653001701640653002701657100002501684700002601709700001901735700002301754700001901777856006701796 2011 eng d00aScreening for Estrogenic and Antiestrogenic Activities of Plants Growing in Egypt and Thailand0 aScreening for Estrogenic and Antiestrogenic Activities of Plants cJune,2011 a107-1130 v33 a

Background: There is a growing demand for the discovery of new phytoestrogens to be used as a safe and effective hormonal replacement therapy. Materials and Methods: The methanol extracts of 40 plants from the Egyptian and Thailand folk medicines were screened for their estrogen agonist and antagonist activities. The estrogenic and antiestrogenic effects of the tested extracts were carried out using the yeast two-hybrid assay system expressing ERα and ERβ. In addition, all the extracts were subjected to a naringinase treatment and retested for their estrogenic activity. Results: The methanol extracts of Derris reticulata and Dracaena lourieri showed the most potent estrogenic activity on both estrogen-receptor subtypes, while, the methanol extracts of Butea monosperma, Erythrina fusca, and Dalbergia candenatensis revealed significant estrogenic activity on ERβ only. Nigella sativa, Sophora japonica, Artabotrys harmandii, and Clitorea hanceana showed estrogenic effect only after naringinase treatment. The most potent antiestrogenic effect was revealed by Aframomum melegueta, Dalbergia candenatensis, Dracena loureiri, and Mansonia gagei.

10aEstrogenic activity10aLeguminoseae10aYeast two-hybrid assay1 aEl-Halawany, Ali, M.1 aDine, Riham, Salah El1 aChung, Mi, Hwa1 aNishihara, Tsutomu1 aHattori, Masao uhttps://www.phcogres.com/article/2011/3/2/1041030974-849081958