title: Maternal-fetal disposition of bisphenol a in pregnant Sprague-Dawley rats.
abstract: This study describes the maternal-fetal disposition of bisphenol A and its distribution into the placenta and amniotic fluid after iv injection (2 mg/kg) to pregnant Sprague-Dawley rats. Bisphenol A was distributed extensively to the placenta and fetus, with their respective AUC values 4.4- and 2.2-fold greater than AUC for the maternal serum. In contrast, the distribution of bisphenol A into the amniotic fluid was low, with the mean amniotic fluid-to-maternal serum AUC ratio of 0.2. The decay curves of bisphenol A in the placenta, fetus, and amniotic fluid paralleled that of the maternal serum during the terminal elimination phase. A five-compartment open model consisting of the maternal central, maternal peripheral, placental, fetal, and amniotic fluid compartments was used to describe the disposition of bisphenol A in pregnant rats, with the elimination occurring from the maternal central and fetal compartments. Based on this model, bisphenol A delivered to the placenta was transferred primarily to the fetus [kpf/(kpf + kpc + kpa) = 65.4 %], with the remaining fraction transported to the maternal central (33.2%) and amniotic fluid (1.4%) compartments. Bisphenol A was eliminated from the amniotic fluid by the fetal (63.9%) and placental (36.1%) routes. On the other hand, bisphenol A was eliminated from the fetus primarily by the placental route back to mother [kfp/(kfp + kfa + kfo) = 100%], with the amniotic route playing an insignificant role in fetal elimination. The percent contribution of the fetal elimination to the total elimination in the maternal-fetal unit was 0.0% [CLfoAUCfetus/(CLcoAUCmaternal serum + CLfoAUCfetus)]. The pharmacokinetic model used in this study provides insights into the routes of elimination of bisphenol A in the maternal-fetal rat upon maternal administration.
authors.affiliation: College of Pharmacy and Department of Biology, Sungkyunkwan University, Kyonggi-do, Korea.
authors.forename: Beom Soo
authors.initials: BS
authors.lastname: Shin
authors.forename: Sun Dong
authors.initials: SD
authors.lastname: Yoo
authors.forename: Chang Youn
authors.initials: CY
authors.lastname: Cho
authors.forename: Ji Hoon
authors.initials: JH
authors.lastname: Jung
authors.forename: Byung Mu
authors.initials: BM
authors.lastname: Lee
authors.forename: Jung Ha
authors.initials: JH
authors.lastname: Kim
authors.forename: Kang Choon
authors.initials: KC
authors.lastname: Lee
authors.forename: Soon-Young
authors.initials: SY
authors.lastname: Han
authors.forename: Hyung Sik
authors.initials: HS
authors.lastname: Kim
authors.forename: Kui Lea
authors.initials: KL
authors.lastname: Park
mesh_terms: D000818:Animals; D019540:Area Under Curve; D001559:Benzhydryl Compounds; D004968:Estrogens, Non-Steroidal / Q000493:pharmacokinetics*; D005260:Female; D007700:Kinetics; D008431:Maternal-Fetal Exchange; D010636:Phenols / Q000493:pharmacokinetics*; D010920:Placenta / Q000737:chemistry / Q000502:physiology; D011247:Pregnancy; D051381:Rats; D017207:Rats, Sprague-Dawley; D014018:Tissue Distribution; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D004968:Estrogens, Non-Steroidal; D010636:Phenols; C006780:bisphenol A; D000098826:Bisphenol A Compounds