Document Detail


Low-dose treatment with polybrominated diphenyl ethers (PBDEs) induce altered characteristics in MCF-7 cells.
MedLine Citation:
PMID:  16980705     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Polybrominated diphenyl ethers (PBDEs) are hydrophobic and persistent additive flame retardants that seemingly transfer into environmental compartments where they bioaccumulate i.e. in human biota. We examined the micronucleus-forming activities of low-dose PBDEs (congeners 47, 99, 153, 183 or 209) in MCF-7 cells along with their ability to modulate growth, cell biochemistry [by infrared (IR) microspectroscopy], clonogenic survival or quantitative expression of cytochrome P450 isoenzymes (CYP1A1, CYP1A2 and CYP1B1), cyclin-dependent kinase inhibitor 1A [CDKN1A (P21(WAF1/CIP1))], B-cell leukaemia/lymphoma-2 (BCL-2) and Bcl-2-associated X (BAX). Elevations in micronucleus formation were observed following treatment with 10(-12) to 10(-9) M PBDE concentrations despite the fact that less than one-fourth of the concentration of each test agent administered partitioned out of the media and into the incubating cells. However, low-dose treatment levels remained within the range of reported concentrations measured in UK serum samples collected in 2003. Clonogenic survival and gene expression was unaltered following 10(-12) to 10(-9) M PBDE treatment but significant (P < 0.05) elevations in growth kinetics were observed. Significant alterations in IR cell spectra were associated with treatments, and plotted clusters following principal component analysis highlighted these changes. Whether such in vitro effects point to an underlying ability of PBDEs to initiate and drive target-cell alterations in vivo now needs to be addressed.
Authors:
Jonathan L Barber; Michael J Walsh; Rebecca Hewitt; Kevin C Jones; Francis L Martin
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-09-16
Journal Detail:
Title:  Mutagenesis     Volume:  21     ISSN:  0267-8357     ISO Abbreviation:  Mutagenesis     Publication Date:  2006 Sep 
Date Detail:
Created Date:  2006-09-26     Completed Date:  2006-12-07     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8707812     Medline TA:  Mutagenesis     Country:  England    
Other Details:
Languages:  eng     Pagination:  351-60     Citation Subset:  IM    
Affiliation:
Department of Environmental Science, Lancaster University Lancaster LA1 4YQ, UK.
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MeSH Terms
Descriptor/Qualifier:
Cell Line, Tumor
Cell Proliferation / drug effects
Cell Survival / drug effects
Chromosome Aberrations / chemically induced
Drug Stability
Gene Expression / drug effects
Humans
Micronucleus Tests / methods
Microspectrophotometry / methods
Phenyl Ethers / toxicity*
Polybrominated Biphenyls / toxicity*
Spectroscopy, Fourier Transform Infrared / methods
Chemical
Reg. No./Substance:
0/Phenyl Ethers; 0/Polybrominated Biphenyls; 101-84-8/phenyl ether

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


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