Polymorphisms of alcohol dehydrogenase-2 and aldehyde dehydrogenase-2 and esophageal cancer risk in Southeast Chinese males

Jian-Hua Ding; Su-Ping Li; Hai-Xia Cao; Jian-Zhong Wu; Chang-Ming Gao; Ping Su; Yan-Ting Liu; Jian-Nong Zhou; Jun Chang; Gen-Hong Yao; Osawa, Satoshi
May 2009
World Journal of Gastroenterology;5/21/2009, Vol. 15 Issue 19, p2395
Academic Journal
AIM: To evaluate the impact of alcohol dehydrogenase-2 (ADH2) and aldehyde dehydrogenase-2 (ALDH2) polymorphisms on esophageal cancer susceptibility in Southeast Chinese males. METHODS: Two hundred and twenty-one esophageal cancer patients and 191 healthy controls from Taixing city in Jiangsu Province were enrolled in this study. ADH2 and ALDH2 genotypes were examined by polymerase chain reaction and denaturing high-performance liquid chromatography. Unconditional logistic regression was used to calculate the odds ratios (OR) and 95% confidence interval (CI). RESULTS: The ADH G allele carriers were more susceptible to esophageal cancer, but no association found between ADH2 genotypes and risk of esophageal cancer when disregarding alcohol drinking status. Regardless of ADH2 genotype, ALDH2G/A or A/A carriers had significantly increased risk of developing esophageal cancer, with homozygous individuals showing higher esophageal cancer risk than Provincewereenrolledinthisrovince were enrolled in this those who were heterozygous. A significant interaction between ALDH2 and drinking detected regarding esophageal cancer risk; the OR was 3.05 (95% CI: 1.49-6.25). Compared non-drinkers carrying both ALDH2 G/G and ADH2 A/A, drinkers carrying both ALDH2 A allele and ADH2 G allele showed a significantly higher risk of developing esophageal cancer (OR = 8.36, 95% CI: 2.98-23.46). CONCLUSION: Both ADH2 G allele and ALDH2 A allele significantly increase the risk of esophageal cancer development in Southeast Chinese males. ALDH2 A allele significantly increases the risk of esophageal cancer development especially in alcohol drinkers. Alcohol drinkers carrying both ADH2 G allele and ALDH2 A allele have a higher risk of developing esophageal cancer.


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