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In vivo Characterization of Endocrine Disrupting Chemical Effects via Thyroid Hormone Action Indicator Mouse
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Bisphenol A interferes with thyroid specific gene expression.

Daniela Gentilcore1, Immacolata Porreca, Francesca Rizzo

  • 1IRGS, Biogem, Via Camporeale, 83031 Ariano Irpino, Avellino, Italy.

Toxicology
|December 15, 2012
PubMed
Summary
This summary is machine-generated.

Bisphenol A (BPA), an endocrine disruptor, directly impacts thyroid follicular cells even at low environmental doses. This study reveals BPA alters thyroid hormone synthesis gene expression, suggesting a novel detection method for pollutants.

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Area of Science:

  • Endocrinology
  • Environmental Health
  • Toxicology

Background:

  • Bisphenol A (BPA) is an endocrine-disrupting chemical with widespread human exposure.
  • BPA is known to affect metabolism and thyroid hormone synthesis, but its direct impact on thyroid follicular cells is unstudied.
  • Emerging evidence suggests environmental pollutants like BPA can disrupt thyroid function.

Purpose of the Study:

  • To investigate the effects of low-dose Bisphenol A (BPA) on thyroid follicular cells.
  • To examine BPA's regulation of genes involved in thyroid hormone synthesis and their transcriptional regulators.
  • To assess BPA's impact using both in vitro and in vivo (zebrafish) models.

Main Methods:

  • Utilized in vitro cell cultures and in vivo zebrafish models.
  • Exposed models to environmentally relevant, low doses of BPA (starting at 10(-9)M).
  • Analyzed the expression of genes critical for thyroid hormone synthesis and thyroid-specific transcriptional factors.

Main Results:

  • Detected altered gene expression related to thyroid hormone synthesis in a dose- and time-dependent manner.
  • Demonstrated that thyroid follicular cells can sense and respond to very low concentrations of BPA.
  • Observed significant changes in thyroid-specific transcriptional factors following BPA exposure.

Conclusions:

  • Bisphenol A exerts a direct effect on thyroid follicular cells.
  • Thyroid follicular cells represent a promising in vitro system for detecting low-level thyroid-disrupting pollutants.
  • The study provides insights into BPA's mechanism of action and its disruption of physiological processes.