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Elucidating the Metabolism of 2,4-Dibromophenol in Plants
06:54

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Hormonal activities of new brominated flame retardants

M Ezechiáš1, K Svobodová, T Cajthaml

  • 1Laboratory of Environmental Biotechnology, Institute of Microbiology ASCR, v.v.i., Vídeňská 1083, 142 20 Prague, Czech Republic.

Chemosphere
|January 13, 2012
PubMed

Insights

Alternative flame retardants were tested for hormonal activity. 2,4,6-tribromophenol showed anti-estrogenic and anti-androgenic effects, indicating potential endocrine disruption that warrants environmental monitoring.

Area of Science:

  • Environmental Chemistry
  • Toxicology
  • Endocrinology

Background:

  • Commercial brominated flame retardants are being phased out.
  • Numerous alternative flame retardants lack thorough hormonal activity testing.
  • Assessing endocrine disruption potential of new chemicals is crucial.

Purpose of the Study:

  • To evaluate the endocrine-disrupting potential of eleven alternative flame retardants.
  • To investigate interference with estrogenic and androgenic pathways.
  • To identify specific compounds with significant hormonal activity.

Main Methods:

  • Utilized two distinct yeast reporter-gene assays.
  • Assessed the impact of eleven compounds on human estrogen and androgen receptors.
  • Quantified anti-estrogenic and anti-androgenic activity using luciferase and β-galactosidase reporters.

Main Results:

  • 2,4,6-tribromophenol demonstrated significant anti-estrogenic and anti-androgenic activity.
  • Nominal IC(50) values for anti-estrogenic activity were 14.1 μM (luciferase) and 9.2 μM (β-galactosidase).
  • A nominal IC(50) value of 3.9 μM for anti-androgenic activity was observed.

Conclusions:

  • 2,4,6-tribromophenol exhibits endocrine-disrupting effects.
  • This compound interferes with the transcriptional activity of estrogen and androgen receptors.
  • Environmental monitoring of 2,4,6-tribromophenol is recommended due to its endocrine activity.

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