title: Polymorphisms of the glutathione S-transferase P1 gene and head and neck cancer susceptibility.
abstract: BACKGROUND
  Factors determining the individual susceptibility to head and neck squamous cell carcinoma (HNSCC) are still largely unknown. An imbalance between enzymes involved in the toxification and detoxification of (pre)-carcinogens closely related to HNSCC, which may appear during smoking and alcohol consumption, may play a role. Genetic polymorphisms in glutathione S-transferases (GSTs) often result in altered detoxification, which may contribute to individual susceptibility to HNSCC.
  
  
  METHODS
  We studied the frequencies of polymorphic variants in the GSTP1 gene in 235 patients with HNSCC and 285 healthy controls. In addition, data on exposure to alcohol and tobacco consumption were recorded. DNA was extracted from whole blood, and polymerase chain reaction-based methods were used to detect genetic polymorphisms.
  
  
  RESULTS
  In patients with HNSCC and control groups, the homozygous GSTP1 BB genotype was observed in 12.3% and 13.6%, respectively. No statistical differences were found for the GSTP1 AA and GSTP1 AB/GSTP1BB genotypes.
  
  
  CONCLUSIONS
  Our study showed that genetic polymorphisms of GSTP1 are not associated with altered susceptibility to HNSCC.
authors.affiliation: Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Maastricht, PO Box 5800, 6202 AZ Maastricht, The Netherlands. Michel@Ophuis.net
authors.forename: Michael B
authors.initials: MB
authors.lastname: Oude Ophuis
authors.forename: Hennie M J
authors.initials: HM
authors.lastname: Roelofs
authors.forename: Piet A
authors.initials: PA
authors.lastname: van den Brandt
authors.forename: Wilbert H M
authors.initials: WH
authors.lastname: Peters
authors.forename: Johannes J
authors.initials: JJ
authors.lastname: Manni
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000428:Alcohol Drinking / Q000009:adverse effects; D014408:Biomarkers, Tumor / Q000097:blood / Q000235:genetics; D002294:Carcinoma, Squamous Cell / Q000201:enzymology* / Q000235:genetics; D016022:Case-Control Studies; D005260:Female; D020022:Genetic Predisposition to Disease; D005838:Genotype; D005982:Glutathione Transferase / Q000097:blood / Q000235:genetics*; D006258:Head and Neck Neoplasms / Q000201:enzymology* / Q000235:genetics; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D016017:Odds Ratio; D011110:Polymorphism, Genetic; D014029:Tobacco Use Disorder / Q000150:complications
chemical_list: D014408:Biomarkers, Tumor; D005982:Glutathione Transferase