title: Apurinic/apyrimidinic endonuclease (APE1) gene polymorphisms and lung cancer risk in relation to tobacco smoking.
abstract: BACKGROUND
  Polymorphisms altering DNA repair capacity may lead to synergistic effects with tobacco carcinogen-induced lung cancer risk. Based on this hypothesis, the relationship between APE1 polymorphism, smoking and the risk of lung cancer was explored.
  
  
  METHODS
  The distribution of the APE1 Asp148Glu polymorphisms in 98 lung cancer patients and 67 healthy individuals were compared using PCR-RFLP analysis.
  
  
  RESULTS
  Individuals carrying the APE1 Asp148Glu heterozygous and homozygous variant genotype had a 3.23-fold increased risk of lung cancer compared with these carrying the wild-type (Asp/Asp) genotype (p<0.0001), and those carrying the 148Glu homozygous genotype had a 3.17-fold increased risk (p=0.023). When stratified by smoking status, carriers of the Glu allele of APE1 were at a statistically increased risk of lung cancer among smokers (p=0.001).
  
  
  CONCLUSIONS
  A statistically significant interaction of current smoking status with APE1 Asp148Glu polymorphism was found. These results suggest that the presence of one or two APE1 Glu allele was associated with the risk of developing lung cancer.
authors.affiliation: Department of Molecular Medicine, Institute for Experimental Medicine (DETAE), Faculty of Pharmacy, Istanbul University, Capa 34390 Istanbul, Turkey.
authors.forename: Bedia
authors.initials: B
authors.lastname: Agaçhan
authors.forename: Ozlem
authors.initials: O
authors.lastname: Küçükhüseyin
authors.forename: Pinar
authors.initials: P
authors.lastname: Aksoy
authors.forename: Akif
authors.initials: A
authors.lastname: Turna
authors.forename: Ilhan
authors.initials: I
authors.lastname: Yaylim
authors.forename: Uzay
authors.initials: U
authors.lastname: Görmüs
authors.forename: Arzu
authors.initials: A
authors.lastname: Ergen
authors.forename: Umit
authors.initials: U
authors.lastname: Zeybek
authors.forename: Burak
authors.initials: B
authors.lastname: Dalan
authors.forename: Turgay
authors.initials: T
authors.lastname: Isbir
mesh_terms: D000230:Adenocarcinoma / Q000235:genetics* / Q000556:secondary; D002294:Carcinoma, Squamous Cell / Q000235:genetics* / Q000556:secondary; D016022:Case-Control Studies; D043603:DNA-(Apurinic or Apyrimidinic Site) Lyase / Q000235:genetics*; D005260:Female; D005838:Genotype; D006801:Humans; D008175:Lung Neoplasms / Q000235:genetics* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic / Q000235:genetics*; D012307:Risk Factors; D012907:Smoking / Q000235:genetics*
chemical_list: C085108:APEX1 protein, human; D043603:DNA-(Apurinic or Apyrimidinic Site) Lyase