Estrogenic activities of four components from pregnant mare’s urine extract / 中国药理学通报

ABSTRACT

Aim To investigate the estrogenic activities of four components from pregnant mare’s urine extract. Methods The estrogenic activities of four components were assessed using two in vitro teststhe MCF-7 cell proliferation assay (E-screen test)and the luciferase transfected CHO cell gene reporter assay.In the lucifer-ase reporter gene assay,the reporter gene plasmids PGM-ERE-Luc and ERαor ERβand a control plasmid (pRL-cmv)were transiently co-transfected into CHO cells to establish an ERα-or ERβ-cell screening system which was used to measure estrogenic activity of four compounds.Results MCF-7 cells treated with HP, DHP,PT and HA significantly proliferated,thereby of-fering in vitro evidence for the estrogenic activities of HP,DHP,PT and HA,and they showed dose-depend-ent activities.Compared EC50 of PE and RPE with that of E2 ,HP,DHP,PT and HA exerted relatively weak estrogenic activities.The in vitro ER-mediated reporter gene assay revealed that HP,DHP,PT and HA dis-played estrogenic activities mediated by ERβor ERα. Compared with the EC50 of E2 ,HP,DHP,PT and HA exhibited lower estrogenic potencies.Conclusion HP, DHP,PT and HA possess weaker estrogenic activities than E2 .