NDLI: Comparison of PBDE congeners as inducers of oxidative stress in zebrafish.

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Comparison of PBDE congeners as inducers of oxidative stress in zebrafish.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Usenko, Crystal Y. Abel, Erika L. Kudela, Molly Janise, Annie Bruce, Erica D.
Description	Country affiliation: United States Author Affiliation: Usenko CY ( Department of Biology, Baylor University, Waco, Texas, USA.)
Abstract	A proposed primary pathway through which polybrominated diphenyl ethers (PBDEs) disrupt normal biological functions is oxidative stress. In the present study, 4 PBDE congeners were evaluated for their potential to initiate oxidative stress in zebrafish during development: BDE 28, BDE 47, BDE 99, and BDE 100. N-acetylcysteine (NAC) was used to increase intracellular glutathione concentrations and only decreased the effects of BDE 28 at 10 ppm and 20 ppm and BDE 47 at 20 ppm. N-acetylcysteine coexposure did not alter the rates of mortality or curved body axis compared with PBDE exposure alone. The activity of glutathione-S-transferase (GST) was not altered at 24 h postfertilization (hpf), but increased following 10 ppm BDE 28 exposure at 120 hpf. Transcription of several genes associated with stress was also evaluated. At 24 hpf, cytochrome c oxidase subunit 6a (COX6a) transcription was up-regulated in embryos exposed to BDE 99, and BDE 28 exposure up-regulated the transcription of Glutathione-S-transferase-pi (GSTpi). At 24 hpf, glutamate-cysteine ligase (GCLC) was slightly down-regulated by all congeners evaluated. At 120 hpf, TNF receptor-associated protein 1 (TRAP1) and COX6A were up-regulated by all congeners, however GSTpi was down-regulated by all congeners. The results of quantitative real-time transcription polymerase chain reaction are mixed and do not strongly support a transcriptional response to oxidative stress. According to the authors' data, PBDEs do not induce oxidative stress. Oxidative stress may occur at high exposure concentrations; however, this does not appear to be a primary mechanism of action for the PBDE congeners tested.
File Format	HTM / HTML
ISSN	07307268
Issue Number	5
Volume Number	34
e-ISSN	15528618
Journal	Environmental Toxicology and Chemistry
Language	English
Publisher	Wiley
Publisher Date	2015-05-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Research Support, Non-u.s. Gov't Oxidative Stress Toxicity Discipline Environmental Health Electron Transport Complex Iv Acetylcysteine Discipline Toxicology Zebrafish Metabolism Drug Effects Journal Article Growth & Development Chemistry Animals Down-regulation Tnf Receptor-associated Factor 1 Up-regulation Discipline Chemistry Polybrominated Biphenyls Halogenated Diphenyl Ethers Glutamate-cysteine Ligase Glutathione S-transferase Pi Toxicity Tests Glutathione
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis

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