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Related Experiment Video

Updated: Jun 27, 2026

Detecting the Ligand-binding Domain Dimerization Activity of Estrogen Receptor Alpha Using the Mammalian Two-Hybrid Assay
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Atrazine interaction with estrogen expression systems.

J Charles Eldridge1, James T Stevens, Charles B Breckenridge

  • 1Department of Physiology and Pharmacology, Wake Forest University School of Medicine, Winston-Salem, NC 27157-1083, USA. eldridge@wfubmc.edu

Reviews of Environmental Contamination and Toxicology
|November 26, 2008
PubMed
Summary
This summary is machine-generated.

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Atrazine does not act as an estrogen agonist in numerous studies. While it may weakly antagonize estrogen at very high concentrations, this is unlikely to occur in natural environmental exposures.

Area of Science:

  • Environmental Toxicology
  • Endocrinology
  • Molecular Biology

Background:

  • Extensive research has investigated atrazine's effects on estrogen-dependent systems.
  • Over 40 publications and numerous in vitro studies have examined atrazine's interaction with estrogen receptors.

Purpose of the Study:

  • To synthesize findings on atrazine's estrogenic and anti-estrogenic activities.
  • To determine if atrazine acts as an estrogen receptor agonist or antagonist.

Main Methods:

  • Review of over 40 publications detailing atrazine responses in 17 estrogen-dependent systems.
  • Analysis of in vitro reporter and estrogen receptor-binding studies.
  • Examination of various in vivo and in vitro models across multiple species.

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Main Results:

  • Consistent failure to demonstrate atrazine as an estrogen receptor agonist across diverse systems.
  • Equivocal results regarding atrazine's ability to antagonize estrogen-mediated responses.
  • In vivo studies more consistently show inhibition of estrogenic responses, but only at high, environmentally unrealistic concentrations.

Conclusions:

  • Atrazine is not an estrogen receptor agonist.
  • Atrazine may act as a weak antagonist at high concentrations under specific conditions, unlikely in normal environmental exposure.
  • Observed inhibitory effects likely result from low-affinity, non-specific interactions.