Alcohol and colorectal cancer: the role of alcohol dehydrogenase 1C polymorphism

Homann, Nils; König, Inke R; Marks, Michael; Benesova, Monika; Stickel, Felix; Millonig, Gunda; Mueller, Sebastian; Seitz, Helmut K (2009). Alcohol and colorectal cancer: the role of alcohol dehydrogenase 1C polymorphism. Alcoholism: clinical and experimental research, 33(3), pp. 551-6. Oxford: Wiley-Blackwell 10.1111/j.1530-0277.2008.00868.x

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BACKGROUND: Chronic alcohol consumption is a risk factor for colorectal cancer. Animal experiments as well as genetic linkage studies in Japanese individuals with inactive acetaldehyde dehydrogenase leading to elevated acetaldehyde concentrations following ethanol ingestion support the hypothesis that acetaldehyde may be responsible for this carcinogenic effect of alcohol. In Caucasians, a polymorphism of alcohol dehydrogenase 1C (ADH1C) exists resulting in different acetaldehyde concentrations following ethanol oxidation. METHODS: To evaluate whether the association between alcohol consumption and colorectal tumor development is modified by ADH1C polymorphism, we recruited 173 individuals with colorectal tumors diagnosed by colonoscopy and 788 control individuals without colorectal tumors. Genotyping was performed using genomic DNA extracted from whole blood followed by polymerase chain reaction. RESULTS: Genotype ADH1C*1/1 was more frequent in patients with alcohol-associated colorectal neoplasia compared to patients without cancers in the multivariate model controlling for age, gender, and alcohol intake (odds ratio = 1.674, 95% confidence interval = 1.110-2.524, 2-sided p from Wald test = 0.0139). In addition, the joint test of the genetic effect and interaction between ADH1C genotype and alcohol intake (2-sided p = 0.0007) indicated that the difference in ADH1C*1 polymorphisms between controls and colorectal neoplasia is strongly influenced by the alcohol consumption and that only individuals drinking more than 30 g ethanol per day with the genotype ADH1C*1/1 had an increased risk for colorectal tumors. CONCLUSIONS: These data identify ADH1C homozygosity as a genetic risk marker for colorectal tumors in individuals consuming more than 30 g alcohol per day and emphasize the role of acetaldehyde as a carcinogenic agent in alcohol-related colorectal carcinogenesis.

Item Type:	Journal Article (Original Article)
Division/Institute:	04 Faculty of Medicine > Service Sector > Institute of Clinical Pharmacology and Visceral Research [discontinued]
UniBE Contributor:	Stickel, Felix
ISSN:	0145-6008
ISBN:	19120062
Publisher:	Wiley-Blackwell
Language:	English
Submitter:	Factscience Import
Date Deposited:	04 Oct 2013 15:05
Last Modified:	05 Dec 2022 14:20
Publisher DOI:	10.1111/j.1530-0277.2008.00868.x
PubMed ID:	19120062
Web of Science ID:	000263518400019
URI:	https://boris.unibe.ch/id/eprint/28347 (FactScience: 120243)