Abstract
The present study aimed to experimentally confirm that long-term alcohol drinking causes a high risk of oral and esophageal cancer in aldehyde dehydrogenase 2 (ALDH2)-deficient individuals. Aldh2 knockout mice, an animal model of ALDH2-deficiency, were treated with 8% ethanol for 14 months. Levels of acetaldehyde-derived DNA adducts were increased in esophagus, tongue and submandibular gland. Our finding that a lack of Aldh2 leads to more DNA damage after chronic ethanol treatment in mice supports epidemiological findings on the carcinogenicity of alcohol in ALDH2-deficient individuals who drink chronically.
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