Continuous exposure to bisphenol A during in vitro follicular development induces meiotic abnormalities

Sandy Lenie, Rita Cortvrindt, U. Eichenlaub-Ritter, Johan Smitz

Research output: Contribution to journalArticlepeer-review

130 Citations (Scopus)

Abstract

Bisphenol A (BPA), a widely used environmental contaminant, may exert weak estrogenic, anti-androgenic and anti-thyroidic activities. BPA is suspected to possess aneugenic properties that may affect somatic cells and mammalian oocytes. Oocyte growth and maturation depend upon a complex bi-directional signaling between the oocyte and its companion somatic cells. Consequently, disturbances in oocyte maturation may originate either from direct effects of BPA at the level of the oocyte or from indirect influences at the follicular level, such as alterations in hormonal homeostasis. This study aimed to analyze the effects of chronic BPA exposure (3 nM to 30 microM) on follicle-enclosed growth and maturation of mouse oocytes in vitro. Oocytes were cultured and their spindle and chromosomes were stained by alpha-tubulin immunofluorescence and ethidium homodimer-2, respectively. Confocal microscopy was utilized for subsequent analysis. Only follicles that were exposed to 30 microM BPA during follicular development showed a slightly reduced granulosa cell proliferation and a lower total estrogen production, but they still developed and formed antral-like cavities. However, 18% of oocytes were unable to resume meiosis after stimulation of oocyte maturation, and 37% arrested after germinal vesicle breakdown, significantly different from controls (p
Original languageEnglish
Pages (from-to)71-81
Number of pages11
JournalMutation Research
Volume651
Publication statusPublished - 2008

Keywords

  • bisphenol
  • meiotic
  • in vitro

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