title: A limited association of OGG1 Ser326Cys polymorphism for adenocarcinoma of the lung.
abstract: The 8-oxoguanine DNA glycosylase (OGG1) repairs DNA by removing 8-hydroxyguanine, a highly mutagenic oxidative DNA adduct. Recently, the gene for OGG1 was cloned and several polymorphisms have been reported. Because environmental carcinogens produce 8-hydroxyguanine residues that potentially cause oncogenic mutations by mismatching to this modified base, the capacity to repair these lesions can be involved in cancer susceptibility. This study investigated the association between OGG1 Ser326Cys polymorphism and risk of the lung adenocarcinoma for Japanese by a prevalent case-control study in Japan. The subjects comprised 138 cases and 241 non-cancer outpatients as controls. OGG1 gene polymorphism was genotyped by a PCR-CTPP (polymerase chain reaction with confronting two-pair primers) method. The distribution of OGG1 Ser326Cys genotype among controls (Ser/Ser, 28.3%; Ser/Cys, 49.2%; and Cys/Cys, 22.5%) was not different from that among cases (Ser/Ser, 29.0%; Ser/Cys, 51.4%; and Cys/Cys, 24.0%). The sex-age adjusted odds ratio (OR) was 1.06 with 95% confidence interval (CI) 0.64-1.76 for Ser/Cys genotype and 0.81 with 0.44-1.52 for Cys/Cys genotype. The ORs according to the interval between diagnosis and study enrollment were also examined because the polymorphism was a potential prognostic factor of lung cancer. The ORs of Ser/Cys and Cys/Cys genotypes in the cases less than 3 years after diagnosis were higher than overall ORs; 1.86 (95%CI, 0.91-3.77), and 1.46 (0.64-3.35), respectively. The OR for smoking was not statistically different among genotype, though the sample size was too small to detect even a moderate interaction. This study supported the first study by Sugimura et al (Cancer Epidemiol Biomarkers Prev, 1999; 8: 669-674), that the association of OGG1 Ser326Cys polymorphism was limited for the risk of lung adenocarcinoma.
authors.affiliation: Division of Epidemiology and Prevention, Aichi Cancer Center Research Institute, Nagoya, Japan.
authors.forename: Hidemi
authors.initials: H
authors.lastname: Ito
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Hamajima
authors.forename: Toshiro
authors.initials: T
authors.lastname: Takezaki
authors.forename: Keitaro
authors.initials: K
authors.lastname: Matsuo
authors.forename: Kazuo
authors.initials: K
authors.lastname: Tajima
authors.forename: Shunzo
authors.initials: S
authors.lastname: Hatooka
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Mitsudomi
authors.forename: Motokazu
authors.initials: M
authors.lastname: Suyama
authors.forename: Shigeki
authors.initials: S
authors.lastname: Sato
authors.forename: Ryuzo
authors.initials: R
authors.lastname: Ueda
mesh_terms: D000230:Adenocarcinoma / Q000235:genetics*; D000368:Aged; D016022:Case-Control Studies; D043382:DNA-Formamidopyrimidine Glycosylase; D005260:Female; D005838:Genotype; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008175:Lung Neoplasms / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D009699:N-Glycosyl Hydrolases / Q000235:genetics*; D011110:Polymorphism, Genetic; D012907:Smoking / Q000453:epidemiology / Q000235:genetics
chemical_list: D009699:N-Glycosyl Hydrolases; D043382:DNA-Formamidopyrimidine Glycosylase