alexa Comparison of the reporter gene assay for ER-alpha antagonists with the immature rat uterotrophic assay of 10 chemicals.
Toxicology

Toxicology

Journal of Clinical Toxicology

Author(s): Yamasaki K, Takeyoshi M, Yakabe Y, Sawaki M, Takatsuki M

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Abstract We performed a reporter gene assay for estrogen receptor (ER)-alpha agonists and antagonists of 10 chemicals that showed both estrogen agonistic and reduced the estrogenic effect of ethinyl estradiol in a rat uterotrophic assay. The chemicals tested by the immature uterotrophic assay were p-(tert-pentyl)phenol, 4,4'-thiobis-phenol, 4,4'-(hexafluoroisopropylidene)diphenol, 2,2-bis(4-hydroxyphenyl)-4-methyl-n-pentane, 4,4'-(octahydro-4,7-methano-5H-inden-5-ylidene)bisphenol, 4-(phenylmethyl)phenol, 4,4'-dihydroxybenzophenone, 2,2',4,4'-tetrahydroxybenzophenone, 4-hydroxybenzophenone and 2,4,4'-trihydroxybenzophenone. Although all chemicals examined in this study were positive in the reporter gene assay for ER-alpha agonists, 4,4'-(octahydro-4,7-methano-5H-inden-5-ylidene)bisphenol was only positive in the reporter gene assay for ER-alpha antagonists. These findings demonstrate that results of the reporter gene assay for ER-alpha agonists correlated well with those of the uterotrophic assay, but antagonistic change of 9 of 10 chemicals in the uterotrophic assay was not detected by the reporter gene assay for ER-alpha antagonists.
This article was published in Toxicol Lett and referenced in Journal of Clinical Toxicology

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