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Abstract Title:

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

Abstract Source:

Toxicol Lett. 2004 Jan 15 ;146(2):111-20. PMID: 14643963

Abstract Author(s):

Kanji Yamasaki, Shuji Noda, Nobuya Imatanaka, Yoshikuni Yakabe

Article Affiliation:

Chemicals Assessment Center, Chemicals Evaluation and Research Institute, 3-822 Ishii, Hita, 877-0061 Oita, Japan. yamasaki-kanji@ceri.jp

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.

Study Type : In Vitro Study

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Sayer Ji
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