title: [Association between genetic polymorphisms in methylenetetrahydrofolate reductase and risk of laryngeal squamous cell carcinoma].
abstract: OBJECTIVE
  To determine whether genetic variations in methylenetetrahydrofolate reductase (MTHFR) are associated with the risk of laryngeal squamous cell carcinoma (LSCC) in a Chinese population.
  
  
  METHODS
  Two hundred and seven cases with LSCC and 400 matched health controls were genotyped for the MTHFR 677C > T and 1298A > C polymorphisms by PCR-restriction fragment length polymorphism (PCR-RFLP) methods. The relation between these genotypes and risk of LSCC and gene-environment interaction were analyzed. The adjusted odds ratios (OR) and 95% confidence intervals (CI) were calculated by using unconditional Logistic regression model.
  
  
  RESULTS
  The individuals with 677CT and 677TT genotype had a 1.66-fold (95% CI 1.08-2.52) and 3.35-fold (95% CI 2.07-5.54) increased risk of developing LSCC compared with those who had 677CC genotype. The individuals with MTHFR 1298A > C genotype was not significantly different between the two groups. Furthermore, cigarette smoking was also found to interact with MTHFR 677C > T polymorphism in increasing the risk to LCSS further demonstrating the role of gene-environment interaction in development of LSCC.
  
  
  CONCLUSIONS
  These findings suggested that the MTHFR 677C > T polymorphism may contribute to the risk of developing LSCC among Chinese population.
authors.affiliation: Department of Otolaryngology Head and Neck Surgery, Affiliated Beijing Tongren Hospital, Capital University of Medical Sciences, Key Laboratory of Otorhinolaryngology Head and Neck Surgery, Ministry of Education, Beijing 100730, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Ni
authors.forename: Jun
authors.initials: J
authors.lastname: Tai
authors.forename: Li-Jing
authors.initials: LJ
authors.lastname: Ma
authors.forename: Zhi-Gang
authors.initials: ZG
authors.lastname: Huang
authors.forename: Ju-Gao
authors.initials: JG
authors.lastname: Fang
authors.forename: Xiao-Hong
authors.initials: XH
authors.lastname: Chen
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.forename: Li-Ping
authors.initials: LP
authors.lastname: Zhao
authors.forename: Xin-Xin
authors.initials: XX
authors.lastname: Lu
authors.forename: De-Min
authors.initials: DM
authors.lastname: Han
mesh_terms: D000368:Aged; D044466:Asian People; D002294:Carcinoma, Squamous Cell / Q000235:genetics*; D016022:Case-Control Studies; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D007822:Laryngeal Neoplasms / Q000235:genetics*; D008297:Male; D042965:Methylenetetrahydrofolate Reductase (NADPH2) / Q000235:genetics*; D008875:Middle Aged; D011110:Polymorphism, Genetic; D012307:Risk Factors
chemical_list: D042965:Methylenetetrahydrofolate Reductase (NADPH2)