title: [GSTM1 and GSTT1 genes analysis in head and neck cancer patients].
abstract: OBJECTIVE
  To establish the clinical and demographic profile and identify risk factors among patients with head and neck cancer and relate them to the polymorphism of GSTT1 and GSTM1.
  
  
  METHODS
  One hundred patients with head and neck cancer and 100 control group individuals without history of neoplasm were analyzed. . The molecular analysis were made by multiplex polymerase chain reaction. For statistical analysis, data were tabulated and compared by the Fisher's exact test, the Chi-square test and multiple logistic regression were also used.
  
  
  RESULTS
  There was prevalence of smokers (OR = 5.32, CI 95% CI = 2.04-13.86 p = 0.0006), alcohol drinkers (OR = 5.04, CI 95% = 2.19-11.59 p = 0.0001) in head and neck cancer patients . The GSTT1 null genotype was found in 47% of the patient and 41% of the control group (OR = 0.67; CI 95%= 0.34-1.35; p = 0.2648). Likewise , the GSTM1 null genotype was found in 66% of the patient and 75% of the control group (OR = 2.25; CI 95%= 1.05 - 4.84; p = 0.0368). The combined GSTT1 and GSTM1 gene null genotype shown association between GSTM1 0/GSTT1 and occurrence of head and neck carcinoma (OR = 7.64; CI 95%= 1.72-34.04; p = 0.0076). Analysis of clinical-pathological features showed association between GSTT1 null genotype and larynx, the inverse relation between this genotype and pharynx.
  
  
  CONCLUSIONS
  In our study it was possible to establish association between GSTM1 null genotypes and head and neck cancer.
authors.affiliation: Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, SP.
authors.forename: Cássia Veridiana Dourado
authors.initials: CV
authors.lastname: Leme
authors.forename: Luis Sérgio
authors.initials: LS
authors.lastname: Raposo
authors.forename: Mariangela Torreglosa
authors.initials: MT
authors.lastname: Ruiz
authors.forename: Joice Matos
authors.initials: JM
authors.lastname: Biselli
authors.forename: Ana Lívia Silva
authors.initials: AL
authors.lastname: Galbiatti
authors.forename: José Victor
authors.initials: JV
authors.lastname: Maniglia
authors.forename: Erika Cristina
authors.initials: EC
authors.lastname: Pavarino-Bertelli
authors.forename: Eny Maria
authors.initials: EM
authors.lastname: Goloni-Bertollo
mesh_terms: D000428:Alcohol Drinking / Q000009:adverse effects / Q000453:epidemiology; D002294:Carcinoma, Squamous Cell / Q000235:genetics*; D004812:Epidemiologic Methods; D005260:Female; D005838:Genotype; D005982:Glutathione Transferase / Q000235:genetics*; D006258:Head and Neck Neoplasms / Q000235:genetics*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic; D012307:Risk Factors; D012737:Sex Factors; D012907:Smoking / Q000009:adverse effects / Q000453:epidemiology
chemical_list: D005982:Glutathione Transferase; C413545:glutathione S-transferase T1