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Updated: Jun 2, 2026

Microbead Implantation in the Zebrafish Embryo
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Microbead Implantation in the Zebrafish Embryo

Published on: July 30, 2015

PBDE developmental effects on embryonic zebrafish.

Crystal Y Usenko1, Eleanor M Robinson, Sascha Usenko

  • 1Baylor University, Waco, Texas, USA.

Environmental Toxicology and Chemistry
|May 12, 2011
PubMed
Summary
This summary is machine-generated.

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Polybrominated diphenyl ethers (PBDEs) cause developmental issues in zebrafish, with lower brominated congeners inducing malformations and mortality. Toxicity is linked to physical-chemical properties, suggesting receptor-mediated effects.

Area of Science:

  • Environmental Toxicology
  • Developmental Biology
  • Ecotoxicology

Background:

  • Polybrominated diphenyl ethers (PBDEs) are widespread environmental contaminants.
  • PBDEs exhibit bioaccumulation and maternal-fetal transfer potential.
  • Regulatory actions have led to bans and phase-outs of PBDE mixtures.

Purpose of the Study:

  • To evaluate the developmental toxicity of six environmentally relevant PBDE congeners in embryonic zebrafish.
  • To investigate the relationship between PBDE physical-chemical properties and observed developmental effects.
  • To explore structure-activity relationships for PBDE toxicity.

Main Methods:

  • Embryonic zebrafish were exposed to six PBDE congeners (BDE 28, 47, 99, 100, 153, 183).
  • Developmental endpoints including behavior, physical malformations, and mortality were assessed daily up to 168 hours postfertilization (hpf).

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  • Concentration-dependent effects and correlations between log K(OW), LC50, and EC50 were analyzed.

    • Main Results:

    • PBDE exposure caused concentration-dependent increases in spontaneous movement and altered swimming rates.
    • Lower brominated congeners (BDE 28, 47, 99, 100) induced curved body axis malformations and mortality.
    • Higher brominated congeners (BDE 153, 183) did not elicit significant adverse effects.

    Conclusions:

    • PBDE developmental toxicity in zebrafish is congener-specific and influenced by bromination levels.
    • Structure-activity relationships suggest PBDE acute toxicity may involve receptor-mediated pathways.
    • Further research is needed to elucidate the specific mechanisms of PBDE developmental toxicity.