Document Detail


Correlation of asbestos-induced cytogenetic effects with cell transformation of Syrian hamster embryo cells in culture.
MedLine Citation:
PMID:  6091868     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The cytogenetic effects of chrysotile asbestos on Syrian hamster embryo cells in vitro were investigated at doses which induced morphological and neoplastic transformation but which failed to induce measurable gene mutations in the cells at two genetic loci. Chrysotile asbestos treatment of the cells significantly induced chromosome changes in a dose-dependent manner. Up to 50% of the cells had chromosome abnormalities in number or structure following treatment with asbestos (2.0 micrograms/sq cm) for 48 hr. Numerical chromosome changes were the most pronounced abnormalities although significant increases in metaphases with other chromosome aberrations (breaks, fragments, exchanges, and/or dicentrics) and cells with binuclei or micronuclei were also observed. A linear relationship was observed between the incidences of cells with tetraploid metaphases and binucleated cells, suggesting that binucleation and tetraploidy are related. Cytogenetic effects of other mineral dusts were also tested 48 hr following treatment at a concentration of 2.0 micrograms/sq cm. Crocidolite asbestos was less potent than chrysotile asbestos in its ability to induce cell transformation and cytogenetic damage. Treatment of the cells with thin glass fibers (Code 100) was also able to induce cell transformation and cytogenetic effects, but thick glass fibers (Code 110) were much less potent for both endpoints. Milling of the thin glass fibers decreased the length of the fibers and abolished their ability to induce cell transformation and cytogenetic effects. Nonfibrous alpha-quartz induced neither cell transformation nor cytogenetic effects at the dose of 2.0 micrograms/sq cm. The results indicate that the physical characteristics of the fibers determine their ability to induce cell transformation and their ability to induce chromosome mutations, suggesting a possible mechanistic relationship.
Authors:
M Oshimura; T W Hesterberg; T Tsutsui; J C Barrett
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Cancer research     Volume:  44     ISSN:  0008-5472     ISO Abbreviation:  Cancer Res.     Publication Date:  1984 Nov 
Date Detail:
Created Date:  1984-11-28     Completed Date:  1984-11-28     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  2984705R     Medline TA:  Cancer Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  5017-22     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Asbestos / toxicity*
Asbestos, Crocidolite
Asbestos, Serpentine
Benzo(a)pyrene / toxicity
Cell Survival / drug effects
Cell Transformation, Neoplastic*
Cells, Cultured
Chromosome Aberrations*
Cricetinae
Embryo, Mammalian
Kinetics
Mesocricetus
Mutagens*
Mutation*
Chemical
Reg. No./Substance:
0/Asbestos, Serpentine; 0/Mutagens; 12001-28-4/Asbestos, Crocidolite; 1332-21-4/Asbestos; 50-32-8/Benzo(a)pyrene

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


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