Bisphenol A induces otolith malformations during vertebrate embryogenesis
Yann Gibert1, Sana Sassi-Messai, Jean-Baptiste Fini
1Institut de Génomique Fonctionnelle de Lyon; Université de Lyon; Université Lyon 1; CNRS; INRA; Ecole Normale Supérieure de Lyon; 46 allée d'Italie, 69364 Lyon Cedex 07, France. vincent.laudet@ens-lyon.fr
BMC Developmental Biology
|January 29, 2011
Summary
Bisphenol A (BPA) causes developmental defects in otolith formation in zebrafish and Xenopus embryos. These effects are independent of estrogen and thyroid hormone pathways, highlighting broader endocrine disruption concerns.
Area of Science:
- Developmental Biology
- Endocrinology
- Toxicology
Background:
- Bisphenol A (BPA) is a widely produced plastic monomer and plasticizer.
- BPA is a suspected endocrine disruptor affecting developmental and reproductive processes.
- Evidence suggests BPA interferes with estrogen and thyroid hormone signaling.
Purpose of the Study:
- Investigate the effects of BPA on embryonic development.
- Utilize zebrafish and Xenopus models to study BPA's impact.
- Determine the mechanisms underlying BPA's developmental toxicity.
Main Methods:
- Exposed zebrafish and Xenopus embryos to varying concentrations of BPA.
- Observed otic vesicle and otolith development.
- Tested the role of estrogen and thyroid hormone receptors.
- Investigated the involvement of Na+/K+ ATPases.
Main Results:
- BPA exposure caused dose-dependent defects in otolith formation, including aggregation and failure to form.
- Effects were independent of estrogen and thyroid hormone receptor signaling.
- Inhibition of Na+/K+ ATPases with ouabain rescued BPA-induced otolith defects.
Conclusions:
- BPA's developmental effects extend beyond previously understood mechanisms.
- The findings suggest BPA acts through pathways independent of estrogen and thyroid hormone receptors.
- A systematic survey of BPA's developmental effects is warranted.
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