Evaluation of the Mutagenic Potential of the Principal DNA Adduct of Acrolein

Acrolein is produced extensively in the environment by incomplete combustion of organic materials, and it arises endogenously in humans as a metabolic by-product. Acrolein reacts with DNA at guanine residues to form the exocyclic adduct, 8-hydroxypropanodeoxyguanosine (HOPdG). Acrolein is mutagenic,...

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Bibliographic Details
Published in:The Journal of biological chemistry 2001-03, Vol.276 (12), p.9066-9070
Main Authors: VanderVeen, Laurie A., Hashim, Muhammed F., Nechev, Lubomir V., Harris, Thomas M., Harris, Constance M., Marnett, Lawrence J.
Format: Article
Language:English
Subjects:
8-hydroxypropanodeoxyguanosine
Acrolein
Acrolein - toxicity
base excision repair
Base Sequence
DNA Adducts - toxicity
DNA Primers
DNA Repair
DNA-Directed DNA Polymerase - metabolism
Escherichia coli
Escherichia coli - genetics
Evaluation Studies as Topic
Genetic Vectors
Mutagenicity Tests
Mutagens - toxicity
Salmonella typhimurium
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Summary:Acrolein is produced extensively in the environment by incomplete combustion of organic materials, and it arises endogenously in humans as a metabolic by-product. Acrolein reacts with DNA at guanine residues to form the exocyclic adduct, 8-hydroxypropanodeoxyguanosine (HOPdG). Acrolein is mutagenic, and a correlation exists between HOPdG levels in Salmonella typhimurium treated with acrolein and a resultant increase in mutation frequency. Site-specifically modified oligonucleotides were used to explore the mutagenic potential of HOPdG in Escherichia coli strains that were either wild-type for repair or deficient in nucleotide excision repair or base excision repair. Oligonucleotides modified with HOPdG were inserted into double-stranded bacteriophage vectors using the gapped-duplex method or into single-stranded bacteriophage vectors and transformed into SOS-induced E. coli strains. Progeny phage were analyzed by oligonucleotide hybridization to establish the mutation frequency and the spectrum of mutations produced by HOPdG. The correct base, dCMP, was incorporated opposite HOPdG in all circumstances tested. In contrast, in vitro lesion bypass studies showed that HOPdG causes misincorporation opposite the modified base and is a block to replication. The combination of these studies showed that HOPdG is not miscoding in vivo at the level of sensitivity of these site-specific mutagenesis assays.
ISSN:0021-9258
1083-351X
DOI:10.1074/jbc.M008900200