Document Detail


Polybrominated Diphenyl Ether Congener (BDE-100) Induces Mitochondrial Impairment.
MedLine Citation:
PMID:  23302053     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Brominated flame retardants are used in various consumer products to increase their resistance to fire and/or high temperatures. Polybrominated Diphenyl Ethers (PBDEs) are representatives of this class and among the most widely used congeners, and BDE-100 is produced on a large scale. There is a lack of toxicological data about these compounds, which has recently become a matter of concern to the scientific community. The mitochondria are recognized as the main energy-producing organelles, as well as playing a vital role in the maintenance of many cell functions. Therefore, mitochondria were used in the present work as an experimental model to evaluate the effects of the BDE-100 congeners at concentrations ranging from 0.1 μM to 50 μM. The results showed that high concentrations of BDE-100 were able to induce mitochondrial alterations. It was observed that the substance had an affinity for the hydrophilic portion of the mitochondrial membrane, as monitored by ANS, inhibiting the glutamate + malate stimulated mitochondrial respiration and also inducing dissipation of the mitochondrial membrane potential, deregulation of calcium homeostasis and mitochondrial swelling, the latter being insensitive to cyclosporin A (CsA) but partially inhibited by Ruthenium Red and N-ethyl maleimide. In addition, a significant reduction in mitochondrial ATP content was found, but on the other hand, no oxidative stress was observed after exposure of the mitochondria to BDE-100. These results show the key role of mitochondria in the cytotoxicity induced by BDE-100.
Authors:
L C Pereira; A O Souza; D J Dorta
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-10
Journal Detail:
Title:  Basic & clinical pharmacology & toxicology     Volume:  -     ISSN:  1742-7843     ISO Abbreviation:  Basic Clin. Pharmacol. Toxicol.     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101208422     Medline TA:  Basic Clin Pharmacol Toxicol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2013 The Authors Basic & Clinical Pharmacology & Toxicology © 2013 Nordic Pharmacological Society.
Affiliation:
Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Universidade de São Paulo, Av. Bandeirantes, 3900, Bairro Monte Alegre, CEP:14040-903, Ribeirão Preto, São Paulo, Brazil.
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