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Proceedings of the National Academy of Sciences of the United States of America logoLink to Proceedings of the National Academy of Sciences of the United States of America
. 1978 Apr;75(4):2003–2007. doi: 10.1073/pnas.75.4.2003

Human bronchus-mediated mutagenesis of mammalian cells by carcinogenic polynuclear aromatic hydrocarbons.

I C Hsu, G D Stoner, H Autrup, B F Trump, J K Selkirk, C C Harris
PMCID: PMC392471  PMID: 148049

Abstract

Cultured human bronchial explants activated benzo[alpha]pyrene (BzaP) into electrophilic metabolites that bind to DNA in bronchial epithelial cells. Promutagenic and mutagenic metabolites of BzaP were also released into the culture medium. An increase in mutation frequency for ouabain resistance was found in Chinese hamster V-79 cells when they were cocultivated with bronchial explants in the presence of BzaP. The proximate carcinogenic form of BzaP, the 7,8-diol [(+/-)-r7,t8-dihyroxy-7,8-dihydrobenzo[a]pyrene], was 5-fold more potent as a promutagen than the parent compound. Neither BzaP nor the 7,8-diol increased the mutation frequency in V-79 cells when they were cultured without bronchial explants. The mutation frequency was directly related to the binding levels of BzaP to bronchial DNA and the concentratin of either BzaP or the 7,8-diol in the medium.

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2003

Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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