Determination of bisphenol A concentrations in human biological fluids reveals significant early prenatal exposure.
BACKGROUND
There is broad human exposure to bisphenol A (BPA), an estrogenic endocrine-disrupting chemical widely used for the production of plastic products. BPA is reported to affect preimplantation embryos or fetuses and alter their postnatal development at doses typically found in the environment. We measured contamination of BPA in various kinds of human biological fluids by a novel enzyme-linked immunosorbent assay.


METHODS
Blood samples were obtained from healthy premenopausal women, women with early and full-term pregnancy, and umbilical cord at full-term delivery. Ovarian follicular fluids obtained during IVF procedures and amniotic fluids obtained at mid-term and full-term pregnancy were also subject to BPA measurements.


RESULTS
BPA was present in serum and follicular fluid at approximately 1-2 ng/ml, as well as in fetal serum and full-term amniotic fluid, confirming passage through the placenta. Surprisingly, an approximately 5-fold higher concentration, 8.3 +/- 8.7 ng/ml, was revealed in amniotic fluid at 15-18 weeks gestation, compared with other fluids.


CONCLUSIONS
These results suggest accumulation of BPA in early fetuses and significant exposure during the prenatal period, which must be considered in evaluating the potential for human exposure to endocrine-disrupting chemicals.
Ikezuki
Yumiko
Y
Department of Obstetrics and Gynecology, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
Tsutsumi
Osamu
O
Takai
Yasushi
Y
Kamei
Yoshimasa
Y
Taketani
Yuji
Y
D000395:Air Pollutants, Occupational / Q000032:analysis* / Q000097:blood; D000653:Amniotic Fluid / Q000737:chemistry; D001559:Benzhydryl Compounds; D001826:Body Fluids / Q000737:chemistry*; D036861:Delivery, Obstetric; D005260:Female; D005312:Fetal Blood / Q000737:chemistry; D005333:Fetus / Q000378:metabolism*; D015571:Follicular Fluid / Q000737:chemistry; D006801:Humans; D009994:Osmolar Concentration; D010636:Phenols / Q000032:analysis* / Q000097:blood; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011262:Pregnancy Trimester, Second; D011263:Pregnancy Trimester, Third; D000098826:Bisphenol A Compounds
D000395:Air Pollutants, Occupational; D001559:Benzhydryl Compounds; D010636:Phenols; C006780:bisphenol A; D000098826:Bisphenol A Compounds