The weeks shown in color represent the start and end points of chemical exposure for each study.
|Study Results||Study Details||References|
Results for Bisphenol ADecreased percent of methylated CpG sites in oocytes of Igf2r at 20.0 and 40.0 μg/kg and Peg3 at 40.0 μg/kg. ERα mRNA levels were increased at 40.0 μg/kg with increased ER protein levels at both 20.0 and 40.0 μg/kg dose levels. Alterations in the percentages of primordial, primary, secondary, and antral follicles with increases in oocyte diameter at both doses. Mice treated with 40.0μ/kg had decreased numbers of GVBD stage oocytes. There were increased numbers of abnormal GVBDs at 20.0 and 40.0 μg/kg treatment groups.
Subjects: CD-1 mice
Chemical: Bisphenol A
Low doses tested: 20.0 or 40.0 μg/kg bw/d
Route of administration: dissolved in DMSO and delivered hypodermically
Exposure duration: post-natal day 5 – post-natal day 20 (comparable to human prenatal development from approximately day 1 of week 21 to day 1 of week 38)
Age of measurement: post-natal day 21
|Reference [PubMed Link]
Chao HH, Zhang XF, Chen B, Pan B, Zhang LJ, Li L, Sun XF, Shi QH, Shen W. 2012. Bisphenol A exposure modifies methylation of imprinted genes in mouse oocytes via the estrogen receptor signaling pathway. Histochem Cell Biol 137(2):249-259.