title: NQO1 C609T polymorphism associated with esophageal cancer and gastric cardiac carcinoma in North China.
abstract: OBJECTIVE
  To investigate the association of the NQO1 (C609T) polymorphism with susceptibility to esophageal squamous cell carcinoma (ESCC) and gastric cardiac adenocarcinoma (GCA) in North China.
  
  
  METHODS
  The NQO1 C609T genotypes were determined by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis in 317 cancer patients (193 ESCC and 124 GCA) and 165 unrelated healthy controls.
  
  
  RESULTS
  The NQO1 C609T C/C, C/T and T/T genotype frequency among healthy controls was 31.5 %, 52.1 % and 16.4 % respectively. The NQO1 T/T genotype frequency among ESCC patients (25.9 %) was significantly higher than that among healthy controls (chi(2)=4.79, P=0.028). The NQO1 T/T genotype significantly increased the risk for developing ESCC compared with the combination of C/C and C/T genotypes, with an age, sex and smoking status adjusted odds ratio (OR) of 1.78 (1.04-2.98). This increased susceptibility was pronounced in ESCC patients with family histories of upper gastrointestinal cancers (UGIC) (adjusted OR=2.20, 95 % CI=1.18-3.98). Similarly, the susceptibility of the NQO1 T/T genotype to GCA development was also observed among patients with family histories of UGIC, with an adjusted odds ratio of 2.55 (95 % CI=1.21-5.23), whereas no difference in NQO1 genotype distribution was shown among patients without family histories of UGIC.
  
  
  CONCLUSIONS
  Determination of the NQO1 C609T genotype may be used as a stratification marker to predicate the individuals at high risk for developing ESCC and GCA in North China.
authors.affiliation: Hebei Cancer Institute, Shijiazhuang 050011, China.
authors.forename: Jian-Hui
authors.initials: JH
authors.lastname: Zhang
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Rui
authors.initials: R
authors.lastname: Wang
authors.forename: Helen
authors.initials: H
authors.lastname: Geddert
authors.forename: Wei
authors.initials: W
authors.lastname: Guo
authors.forename: Deng-Gui
authors.initials: DG
authors.lastname: Wen
authors.forename: Zhi-Feng
authors.initials: ZF
authors.lastname: Chen
authors.forename: Li-Zhen
authors.initials: LZ
authors.lastname: Wei
authors.forename: Gang
authors.initials: G
authors.lastname: Kuang
authors.forename: Ming
authors.initials: M
authors.lastname: He
authors.forename: Li-Wei
authors.initials: LW
authors.lastname: Zhang
authors.forename: Ming-Li
authors.initials: ML
authors.lastname: Wu
authors.forename: Shi-Jie
authors.initials: SJ
authors.lastname: Wang
mesh_terms: D000230:Adenocarcinoma / Q000453:epidemiology / Q000235:genetics*; D000328:Adult; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000453:epidemiology / Q000235:genetics*; D016022:Case-Control Studies; D002681:China / Q000453:epidemiology; D004938:Esophageal Neoplasms / Q000453:epidemiology / Q000235:genetics*; D005260:Female; D020022:Genetic Predisposition to Disease / Q000453:epidemiology; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D012150:Polymorphism, Restriction Fragment Length; D013274:Stomach Neoplasms / Q000453:epidemiology / Q000235:genetics*