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ZFIN ID: ZDB-PUB-140130-10
Effects of BDE-209 contaminated sediments on zebrafish development and potential implications to human health
Garcia-Reyero, N., Escalon, B.L., Prats, E., Stanley, J.K., Thienpont, B., Melby, N.L., Barón, E., Eljarrat, E., Barceló, D., Mestres, J., Babin, P.J., Perkins, E.J., and Raldúa, D.
Date: 2014
Source: Environment International 63: 216-223 (Journal)
Registered Authors: Babin, Patrick J., Raldúa, Demetrio, Thienpont, Bernard
Keywords: none
Microarrays: GEO:GSE39169
MeSH Terms:
  • Acetylcholinesterase/metabolism
  • Animals
  • Basic Helix-Loop-Helix Transcription Factors/agonists
  • Cholinesterase Inhibitors/toxicity
  • Computer Simulation
  • Female
  • Flame Retardants/toxicity*
  • Gene Expression/drug effects
  • Geologic Sediments*
  • Halogenated Diphenyl Ethers/toxicity*
  • Humans
  • Neurons/drug effects
  • Receptors, Aryl Hydrocarbon/agonists
  • Receptors, Estrogen/agonists
  • Risk Assessment
  • Water Pollutants, Chemical/toxicity*
  • Water Pollution, Chemical*
  • Zebrafish/embryology*
PubMed: 24317228 Full text @ Environ. Int.

Polybrominated diphenyl ethers are compounds widely used as flame-retardants, which are of increasing environmental concern due to their persistence, and potential adverse effects. This study had two objectives. First, we assessed if BDE-209 in sediment was bioavailable and bioaccumulated into zebrafish embryos. Secondly, we assessed the potential impact on human and environmental health of bioavailable BDE-209 using human in vitro cell assays and zebrafish embryos. Zebrafish were exposed from 4 h to 8 days post-fertilization to sediments spiked with 12.5 mg/kg of BDE-209. Zebrafish larvae accumulated ten fold more BDE-209 than controls in unspiked sediment after 8 days. BDE-209 impacted expression of neurological pathways and altered behavior of larvae, although BDE-209 had no visible affect on thyroid function or motoneuron and neuromast development. Zebrafish data and in silico predictions suggested that BDE-209 would also interact with key human transcription factors and receptors. We therefore tested these predictions using mammalian in vitro assays. BDE-209 activated human aryl hydrocarbon receptor, peroxisome proliferator activating receptors, CF/b-cat, activator protein 1, Oct-MLP, and the estrogen receptor-related alpha (ERRα) receptor in cell-based assays. BDE-209 also inhibited human acetylcholinesterase activity. The observation that BDE-209 can be bioaccumulated from contaminated sediment highlights the need to consider this as a potential environmental exposure route. Once accumulated, our data also show that BDE-209 has the potential to cause impacts on both human and environmental health.