Bisphenol A is released from polycarbonate drinking bottles and mimics the neurotoxic actions of estrogen in developing cerebellar neurons.
Level 5 - mechanism / opinion, no new human data
Bench laboratory chemical migration and in vitro neuronal assays (no human subjects).
PubMed 18155859 · doi:10.1016/j.toxlet.2007.11.001
What was done
Researchers measured the migration of bisphenol A (BPA) into water stored in new and used consumer polycarbonate bottles using a competitive enzyme-linked immunosorbent assay (ELISA). They evaluated migration rates at room temperature and following exposure to boiling water (100 °C). The biological activity of the leached BPA was assessed using an in vitro assay measuring rapid estrogenic signaling and neurotoxicity in developing cerebellar neurons.
What was found
BPA migrated into water from polycarbonate bottles at room temperature at rates ranging from 0.20 ng/h to 0.79 ng/h, which did not differ between new and previously used bottles. Exposure to boiling water (100 °C) increased the BPA migration rate by up to 55-fold. Leached substances exhibited functional estrogenic bioactivity and neurotoxic actions in developing cerebellar neurons in vitro.
Why it matters
This study demonstrates that polycarbonate beverage containers contribute directly to oral BPA exposure, and that heating these containers drastically accelerates chemical leaching.
Limits
The abstract does not state the sample size of bottles tested or the precise concentrations of leached BPA reaching the neuronal culture assays. Findings rely on in vitro neuronal models and chemical migration assays, which cannot establish direct in vivo physiological or clinical neurotoxic outcomes in humans.
Cited by
- supports Heating polycarbonate bottles to 100°C increases the release of BPA by up to 55 times.
- supports Heating liquids causes BPA leaching to be up to 55 times higher compared to cold liquids.