title: [A 13-week subchronic toxicity study of bisphenol A in B6C3F1 mice].
abstract: A 13-week subchronic toxicity study of bisphenol A (BPA) was performed in male and female B6C3F1 mice at dose levels of 0, 0.2, 0.5, 1.0, 2.0 and 4.0% in the diet, to facilitate dose selection for a subsequent carcinogenicity study. Mice were randomly allocated to 6 groups, each consisting of 10 males and 10 females. Two 0.2% group males and two 4.0% group females died during the experimental period. Suppression of body weight gain and increase in food consumption were observed in males and females of the 4.0% groups. Hematological examination revealed decrease in number of erythrocytes, volume of hemoglobin and value of hematocrit in males and females of the groups receiving 1.0% or above, and an increase in number of platelets in males of 4.0% group. Decrease in number of erythrocytes and hematocrit value was also noticed in females of 0.5% group. Histopathologically, cystic dilatation, degeneration or regeneration of renal tublues were found in males and females of 1.0% or higher groups, multinucleated hepatocytes were increased in mice of both sexes treated with any dose of BPA, and fibrous osteodystrophy was observed in males and females of the 4.0% groups. Based on the results of the present study, it was concluded that the maximum tolerance dose (MTD) of BPA is 0.2% in diet, because the dose level of 0.5% proved to exert significant hematological toxicity.
authors.forename: F
authors.initials: F
authors.lastname: Furukawa
authors.forename: A
authors.initials: A
authors.lastname: Nishikawa
authors.forename: M
authors.initials: M
authors.lastname: Mitsui
authors.forename: M
authors.initials: M
authors.lastname: Sato
authors.forename: J
authors.initials: J
authors.lastname: Suzuki
authors.forename: T
authors.initials: T
authors.lastname: Imazawa
authors.forename: M
authors.initials: M
authors.lastname: Takahashi
mesh_terms: D000284:Administration, Oral; D000818:Animals; D001559:Benzhydryl Compounds; D001835:Body Weight / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D005260:Female; D006403:Hematologic Tests; D007668:Kidney / Q000187:drug effects / Q000473:pathology; D008099:Liver / Q000187:drug effects / Q000473:pathology; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D009929:Organ Size / Q000187:drug effects; D010636:Phenols / Q000008:administration & dosage / Q000633:toxicity*; D013997:Time Factors; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D010636:Phenols; C006780:bisphenol A; D000098826:Bisphenol A Compounds