title: MUTYH Gln324His gene polymorphism and genetic susceptibility for lung cancer in a Japanese population.
abstract: BACKGROUND
  Genetic polymorphisms of DNA repair enzymes in the base excision repair (BER) pathway, may lead to genetic instability and lung cancer carcinogenesis. We investigated the interactions among the gene polymorphisms in DNA repair genes and lung cancer.
  
  
  METHODS
  We analyzed associations among OGG1 Ser326Cys and MUTYH Gln324His gene polymorphisms in relation to lung cancer risk using PCR-RFLP. The study involved 108 lung cancer patients and 121 non-cancer controls divided into non-smokers, smokers according to pack-years smoked in Japanese.
  
  
  RESULTS
  The results showed that the MUTYH His/His genotype compared with Gln/Gln genotype showed an increased risk for lung cancer (adjusted odds ratio [OR] 3.03, confidence interval [95%CI], 1.31-7.00, p = 0.010), whereas there was no significant increase for the Gln/His genotype (adjusted OR 1.35, 95%CI 0.70-2.61, p = 0.376). The MUTYH His/His genotype was at a borderline increased risk for both adenocarcinoma and squamous cell carcinoma (adjusted OR 2.50, 95%CI 0.95-6.62, p = 0.065 for adenocarcinoma; adjusted OR 3.20, 95%CI 0.89-11.49, p = 0.075 for squamous cell carcinoma, respectively). However, the OGG1 Ser/Cys or Cys/Cys genotypes compared with the Ser/Ser genotype did not have significantly increased risk for lung cancer, containing either adenocarcinoma or squamous cell carcinoma. The joint effect of tobacco exposure and the MUTYH His/His genotype compared with the Gln/Gln genotype showed a significant association with lung cancer risk in smokers, and there was not significantly increased in non-smokers (adjusted OR 3.82, 95%CI 1.22-12.00, p = 0.022 for smokers; adjusted OR 2.60, 95%CI 0.60-11.25, p = 0.200 for non-smokers, respectively). The effect of tobacco exposure and the OGG1 Ser326Cys showed also no significant risk for lung cancer.
  
  
  CONCLUSIONS
  Our findings suggest that the MUTYH Gln324His polymorphism appear to play an important role in modifying the risk for lung cancer in the Japanese population.
authors.affiliation: Faculty of Health Sciences, Kobe University Graduate School of Medicine, Kobe, Japan. m-stone@mtj.biglobe.ne.jp
authors.forename: Aiko
authors.initials: A
authors.lastname: Miyaishi
authors.forename: Kayo
authors.initials: K
authors.lastname: Osawa
authors.forename: Yasunori
authors.initials: Y
authors.lastname: Osawa
authors.forename: Natsuko
authors.initials: N
authors.lastname: Inoue
authors.forename: Kana
authors.initials: K
authors.lastname: Yoshida
authors.forename: Mayumi
authors.initials: M
authors.lastname: Kasahara
authors.forename: Akimitsu
authors.initials: A
authors.lastname: Tsutou
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Tabuchi
authors.forename: Kazuo
authors.initials: K
authors.lastname: Sakamoto
authors.forename: Noriaki
authors.initials: N
authors.lastname: Tsubota
authors.forename: Juro
authors.initials: J
authors.lastname: Takahashi
mesh_terms: D000230:Adenocarcinoma / Q000201:enzymology / Q000235:genetics; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000201:enzymology / Q000235:genetics; D016022:Case-Control Studies; D045647:DNA Glycosylases / Q000235:genetics*; D005260:Female; D020022:Genetic Predisposition to Disease; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008175:Lung Neoplasms / Q000201:enzymology* / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic; D012307:Risk Factors; D012907:Smoking / Q000235:genetics / Q000378:metabolism
chemical_list: D045647:DNA Glycosylases; C061738:mutY adenine glycosylase