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Reprod Toxicol. 2014 Jun;45:105-16. doi: 10.1016/j.reprotox.2014.01.007. Epub 2014 Feb 25.

Bisphenol A (BPA) pharmacokinetics with daily oral bolus or continuous exposure via silastic capsules in pregnant rhesus monkeys: Relevance for human exposures.

Author information

1
Division of Biological Sciences, University of Missouri, Columbia, MO, United States. Electronic address: vomsaalF@missouri.edu.
2
Department of Obstetrics and Gynecology, University of California, Davis, CA, United States; California National Primate Research Center, University of California, Davis, CA, United States.
3
Division of Biological Sciences, University of Missouri, Columbia, MO, United States.
4
Department of Biomedical Sciences, University of Missouri, Columbia, MO, United States.
5
Université de Toulouse, INPT, ENVT, UPS, UMR1331, F- 31062 Toulouse, France; INRA, UMR1331, Toxalim, Research Centre in Food Toxicology, F- 31027 Toulouse, France.
6
School of Molecular Biosciences, Washington State University, Pullman, WA, United States.

Abstract

We measured serum dBPA in non-pregnant and pregnant female rhesus monkeys, fetuses and amniotic fluid. dBPA was administered by a daily oral bolus or sc implantation of Silastic capsules; both resulted in daily average serum unconjugated dBPA concentrations of <1ng/ml. We observed lower serum concentrations of unconjugated dBPA in pregnant females relative to pre-pregnancy values, and generally lower concentrations in fetal serum than in maternal serum. Differences in pharmacokinetics of dBPA were evident between pre-pregnancy, early and late pregnancy, likely reflecting changes in maternal, fetal and placental physiology. The serum ratio of conjugated to unconjugated dBPA after continuous sc release of dBPA was similar to values reported in human biomonitoring studies and markedly lower than with oral administration, suggesting oral bolus exposure is not an appropriate human exposure model. We report elsewhere that there were numerous adverse effects on fetuses exposed to very low serum dBPA in these studies.

KEYWORDS:

Bisphenol A; Fetus; Maternal; Pharmacokinetics; Pregnancy; Rhesus monkey

PMID:
24582107
PMCID:
PMC4035044
DOI:
10.1016/j.reprotox.2014.01.007
[Indexed for MEDLINE]
Free PMC Article
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