Document Detail


Developmental neurotoxicity of polybrominated diphenyl ether (PBDE) flame retardants.
MedLine Citation:
PMID:  17904639     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Polybrominated diphenyl ethers (PBDEs) are a class of flame retardants used in a variety of consumer products. In the past 25 years, PBDEs have become ubiquitous environmental contaminants. They have been detected in soil, air, sediments, birds, marine species, fish, house dust, and human tissues, blood and breast milk. Diet and house dust appear to be the major sources of PBDE exposure in the general population, though occupational exposure can also occur. Levels of PBDEs in human tissues are particularly high in North America, compared to Asian and European countries, and have been increasing in the past 30 years. Concentrations of PBDEs are particularly high in breast milk, resulting in high exposure of infants. In addition, for toddlers, dust has been estimated to account for a large percentage of exposure. PBDEs can also cross the placenta, as they have been detected in fetal blood and liver. Tetra-, penta- and hexaBDEs are most commonly present in human tissues. The current greatest concern for potential adverse effects of PBDEs relates to their developmental neurotoxicity. Pre- or postnatal exposure of mice or rats to various PBDEs has been shown to cause long-lasting changes in spontaneous motor activity, mostly characterized as hyperactivity or decreased habituation, and to disrupt performance in learning and memory tests. While a reduction in circulating thyroid hormone (T(4)) may contribute to the developmental neurotoxicity of PBDEs, direct effects on the developing brain have also been reported. Among these, PBDEs have been shown to affect signal transduction pathways and to cause oxidative stress. Levels of PBDEs causing developmental neurotoxicity in animals are not much dissimilar from levels found in highly exposed infants and toddlers.
Authors:
Lucio G Costa; Gennaro Giordano
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Review     Date:  2007-08-24
Journal Detail:
Title:  Neurotoxicology     Volume:  28     ISSN:  0161-813X     ISO Abbreviation:  Neurotoxicology     Publication Date:  2007 Nov 
Date Detail:
Created Date:  2007-11-07     Completed Date:  2008-02-07     Revised Date:  2014-09-08    
Medline Journal Info:
Nlm Unique ID:  7905589     Medline TA:  Neurotoxicology     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  1047-67     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Behavior, Animal / drug effects
Biomarkers, Pharmacological / metabolism
Body Burden
Brain / drug effects,  embryology
Embryo, Mammalian / drug effects
Environmental Pollutants / pharmacokinetics,  toxicity*
Female
Flame Retardants / pharmacokinetics,  toxicity*
Humans
Nervous System / drug effects*,  embryology,  metabolism
Oxidative Stress / drug effects
Polybrominated Biphenyls / pharmacokinetics,  toxicity*
Pregnancy
Prenatal Exposure Delayed Effects
Risk Assessment
Signal Transduction / drug effects
Thyroid Hormones / metabolism
Grant Support
ID/Acronym/Agency:
P30 ES007033/ES/NIEHS NIH HHS; P30 ES007033-109011/ES/NIEHS NIH HHS; P30ES07033/ES/NIEHS NIH HHS
Chemical
Reg. No./Substance:
0/Biomarkers, Pharmacological; 0/Environmental Pollutants; 0/Flame Retardants; 0/Polybrominated Biphenyls; 0/Thyroid Hormones
Comments/Corrections

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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