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Genetic Polymorphism of Aldehyde Dehydrogenase 2 in Patients With Upper Aerodigestive Tract Cancer
Author(s) -
Tanabe Hiroki,
Ohhira Motoyuki,
Ohtsubo Tikara,
Watari Jiro,
Yokota Kinichi,
Kohgo Yutaka
Publication year - 1999
Publication title -
alcoholism: clinical and experimental research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.267
H-Index - 153
eISSN - 1530-0277
pISSN - 0145-6008
DOI - 10.1111/j.1530-0277.1999.tb04527.x
Subject(s) - aldh2 , medicine , esophageal cancer , head and neck cancer , aldehyde dehydrogenase , cancer , adh1b , gastroenterology , heterozygote advantage , genotype , oncology , alcohol dehydrogenase , alcohol , enzyme , genetics , dehydrogenase , gene , biology , branched chain alpha keto acid dehydrogenase complex , biochemistry
Background : Alcohol consumption is one of the major risk factors of the upper aerodigestive tract (UADT) cancers, and combined cancers are frequently discovered in the patients with UADT cancer. The association between esophageal cancer and alcohol‐related metabolizing enzymes is well studied, but only a few examinations about the association between head and neck cancer and the enzymes were performed. Methods : Fifty‐two patients with UADT cancer (head and neck cancer in 25, esophageal cancer in 19, and multiple cancers in 8) were examined in the alcohol habit and in the polymorphisms of aldehyde dehydrogenase 2 (ALDH2) and cytochrome P‐4502E1. Results : Patients with multiple cancers had significantly higher ethanol consumption than the other two groups ( p < 0.001). The frequency of ALDH2* 1/2*2 heterozygote was significantly lower ( p = 0.009) in patients with head and neck cancer (5/25) than patients with esophageal cancer (11/19). The allele frequency of P‐4502E1 did not show a significant difference between the groups ( p = 0.700). Conclusions : These results demonstrated the difference in the frequency of ALDH2 heterozygote between the patients with esophageal cancer and patients with head and neck cancer.