alexa Comparative study of the uterotrophic potency of 14 chemicals in a uterotrophic assay and their receptor-binding affinity.
Toxicology

Toxicology

Journal of Clinical Toxicology

Author(s): Yamasaki K, Noda S, Imatanaka N, Yakabe Y

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Abstract We performed an immature rat uterotrophic assay of 14 chemicals having various receptor-binding affinities in order to assess the relationship between their uterotrophic potency and receptor-binding affinity. The chemicals tested were phthalic acid di-n-hexyl ester, phthalic acid di-n-amyl ester, phthalic acid di-n-propyl ester, 2-ethylhexyl-p-hydroxybenzoate, 4,4'-biphenol, 4,4'-sulfonyldiphenol, 4,4'-dihydroxydiphenylmethane, 2,4-dihydroxybenzophenone, 4,4'-cyclohexylidenebisphenol, 4-t-butylpyrocatechol, clomiphene citrate, 4,4'-(1,3-phenylenediisopropylidene)bisphenol, p-t-butylphenol, and diallylterephthlate. Two of the 14 chemicals, phthalic acid di-n-propyl ester and diallylterephthlate, exhibited no receptor-binding affinity, and the receptor-binding affinity of phthalic acid di-n-hexyl ester and phthalic acid di-n-amyl ester was lower than that of the other chemicals. Ten of the chemicals showed uterotrophic potency, the exceptions being phthalic acid di-n-propyl ester, diallylterephthlate, phthalic acid di-n-hexyl ester, and phthalic acid di-n-amyl ester. The results of the present study demonstrate that the affinity of the chemicals in the receptor-binding assay correlated well with their potency in the uterotrophic assay except for a few chemicals with very low receptor-binding affinity.
This article was published in Toxicol Lett and referenced in Journal of Clinical Toxicology

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