title: Assessment of pubertal development in juvenile male rats after sub-acute exposure to bisphenol A and nonylphenol.
abstract: The effects of bisphenol A and nonylphenol on pubertal development in the intact juvenile/peripubertal male Sprague-Dawley rats was observed in this study from PND23-52/53. Two groups of rats were administered orally with either 100 mg/kg body weight of nonylphenol or bisphenol A. Another group of rats were administered orally with a mixture of 100 mg/kg body weight of nonylphenol and bisphenol A. Control group was administered with the vehicle of Tween-80 with corn oil (1:9 v/v). Observations made in this study included growth, age at preputial separation, thyroid, liver, testis and kidney weight and histology, epididymal and seminal vesicle plus coagulation gland weight. Nonylphenol and bisphenol A have been observed to cause delay in puberty onset as well as testicular damage in the treatment groups when compared to the control; spermatogenesis was affected in most treated rats. Bisphenol A also caused the enlargement of the kidney and hydronephrosis. Administration of nonylphenol and bisphenol A as a mixture has caused less than additive effects.
authors.affiliation: Department of Pharmacology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia. benjamintan@fastmail.fm
authors.forename: Benjamin L L
authors.initials: BL
authors.lastname: Tan
authors.forename: Normadiah M
authors.initials: NM
authors.lastname: Kassim
authors.forename: Mustafa Ali
authors.initials: MA
authors.lastname: Mohd
mesh_terms: D000818:Animals; D001559:Benzhydryl Compounds; D001835:Body Weight / Q000187:drug effects; D004968:Estrogens, Non-Steroidal / Q000633:toxicity*; D006651:Histocytochemistry; D007668:Kidney / Q000187:drug effects / Q000473:pathology; D008099:Liver / Q000187:drug effects / Q000473:pathology; D008297:Male; D009929:Organ Size / Q000187:drug effects; D010636:Phenols / Q000633:toxicity*; D051381:Rats; D017207:Rats, Sprague-Dawley; D012741:Sexual Maturation / Q000187:drug effects*; D013737:Testis / Q000187:drug effects / Q000473:pathology; D013961:Thyroid Gland / Q000187:drug effects / Q000473:pathology; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D004968:Estrogens, Non-Steroidal; D010636:Phenols; C025256:nonylphenol; C006780:bisphenol A; D000098826:Bisphenol A Compounds