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HERO ID
80662
Reference Type
Journal Article
Subtype
Review
Title
DNA adducts from acetaldehyde: Implications for alcohol-related carcinogenesis
Author(s)
Brooks, P; Theruvathu, J
Year
2005
Is Peer Reviewed?
Yes
Journal
Alcohol
ISSN:
0741-8329
Book Title
Alcohol
Volume
35
Issue
3
Page Numbers
187-193
Language
English
PMID
16054980
DOI
10.1016/j.alcohol.2005.03.009
Web of Science Id
WOS:000231435900005
URL
https://www.proquest.com/scholarly-journals/dna-adducts-acetaldehyde-implications-alcohol/docview/68432168/se-2?accountid=171501
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Abstract
Alcoholic beverage consumption is classified as a known human carcinogen, causally related to an increased risk of cancer of the upper gastrointestinal tract. The formation of acetaldehyde from ethanol metabolism seems to be the major mechanism underlying this effect. Acetaldehyde is carcinogenic in rodents and causes sister chromatid exchanges and chromosomal aberrations in human cells. The best-studied DNA adduct from acetaldehyde is N2-ethyl-2?-deoxyguanosine, which is increased in liver DNA obtained from ethanol-treated rodents and in white blood cells obtained from human alcohol abusers. However, the carcinogenic relevance of this adduct is unclear in view of the lack of evidence that it is mutagenic in mammalian cells. A different DNA adduct, 1,N2-propano-2?-deoxyguanosine (PdG), can also be formed from acetaldehyde in the presence of histones and other basic molecules. PdG has been shown to be responsible for the genotoxic and mutagenic effects of crotonaldehyde. The PdG adduct can exist in either of two forms: a ring-closed form or a ring-opened aldehyde form. Whereas the ring-closed form is mutagenic, the aldehyde form can participate in the formation of secondary lesions, including DNAûprotein cross-links and DNA interstrand cross-links. The formation of these types of complex secondary DNA lesions resulting from PdG may explain many of the observed genotoxic effects of acetaldehyde described above. Repair of PdG and its associated adducts is complex, involving multiple pathways. Inherited variation in the genes encoding the proteins involved in the repair of PdG and its secondary adducts may contribute to susceptibility to alcoholic beverageûrelated carcinogenesis.
Keywords
DNA Adducts; Mutagens; Acetaldehyde; GO1N1ZPR3B; Index Medicus; Animals; Polymorphism, Genetic -- genetics; Risk Factors; Mutagens -- toxicity; DNA Repair -- genetics; Alcohol Drinking -- adverse effects; Neoplasms -- etiology; Neoplasms -- metabolism; Alcohol Drinking -- genetics; Acetaldehyde -- toxicity; DNA Adducts -- metabolism; Acetaldehyde -- metabolism; Neoplasms -- genetics
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NAAQS
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ISA-NOx (2016)
2008 Final
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