Liu, Xiyuan Nam, Joo-Won Song, Yun Seon Viswanath, Ambily Nath Indu Pae, Ae Nim Kil, Yun-Seo Kim, Hee-Doo Park, Jong Hoon Seo, Eun-Kyoung Chang, Minsun 2024-01-20T10:04:23Z 2024-01-20T10:04:23Z 2021-09-05 2014-03-01 0960-894X https://pubs.kist.re.kr/handle/201004/127011 A novel biological activity of psoralidin as an agonist for both estrogen receptor (ER)alpha and ER beta agonist has been demonstrated in our study. Psoralidin has been characterized as a full ER agonist, which activates the classical ER-signaling pathway in both ER-positive human breast and endometrial cell lines as well as non-human cultured cells transiently expressing either ERa or ERb. The estrogenic activity was determined using the relative expression levels of either reporter or the endogenous genes dependent on the agonist-bound ER to the estrogen response element (ERE). Psoralidin at 10 mu M was able to induce the maximum reporter gene expression corresponding to that of E-2-treated cells and such activation of the ERE-reporter gene by psoralidin was completely abolished by the cotreatment of a pure ER antagonist, implying that the biological activities of psoralidin are mediated by ER. Psoralidin was also able to induce the endogenous estrogen-responsive gene, pS2, in human breast cancer cells MCF-7. It was observed that activation of the classical ER-signaling pathway by psoralidin is mediated via induction of ER conformation by psoralidin and direct binding of the psoralidin-ER complex to the EREs present in the promoter region of estrogen-responsive genes, as shown by chromatin immunoprecipitation assay results. Finally, molecular docking of psoralidin to the ligand binding pocket of the ERa showed that psoralidin is able to mimic the binding interactions of E-2, and thus, it could act as an ER agonist in the cellular environment. (C) 2014 Elsevier Ltd. All rights reserved. English Pergamon Press Ltd. HEALTHY POSTMENOPAUSAL WOMEN BREAST-CANCER PLUS PROGESTIN PROLIFERATION BENEFITS EXTRACT TRIAL L. Psoralidin, a coumestan analogue, as a novel potent estrogen receptor signaling molecule isolated from Psoralea corylifolia Article 10.1016/j.bmcl.2014.01.029 1 Bioorganic & Medicinal Chemistry Letters, v.24, no.5, pp.1403 - 1406 Bioorganic & Medicinal Chemistry Letters 24 5 1403 1406 scie scopus 000331705200032 2-s2.0-84894545489 Chemistry, Medicinal Chemistry, Organic Pharmacology & Pharmacy Chemistry Article HEALTHY POSTMENOPAUSAL WOMEN BREAST-CANCER PLUS PROGESTIN PROLIFERATION BENEFITS EXTRACT TRIAL L. Psoralea corylifolia Psoralidin Phytoestrogen Estrogen receptor Hormone replacement therapy