title: Polymorphisms of arylamine N-acetyltransferase (NAT1 and NAT2) and larynx cancer susceptibility.
abstract: Our aim was to examine the role of NAT1 and NAT2 polymorphisms in human larynx cancer susceptibility. Genotype tests for NAT1 alleles *4, *10 and *11, and NAT2 alleles *4, *5, *6A and *7A, using PCR-RFLP analysis, were performed in 172 healthy Portuguese individuals and 88 patients with squamous cell carcinoma of the larynx. NAT1 and NAT2 genotype frequencies were correlated between patients and control groups, using the chi-square test. Odds ratios and 95% confidence intervals were calculated from 2 x 2 tables with the Fisher's exact model. The statistical analysis of NAT1 and NAT2 genotype frequencies revealed a significant difference of NAT1*10/*11 (p = 0.038) and NAT2*5/*7 (p = 0.003) genotype distribution between cases and controls. We also observed differences concerning tumor location, since NAT1*10/*11 genotype frequency was significantly different when comparing normal control individuals with the glottic subgroup of patients. The present data suggest that NAT1 and NAT2 polymorphisms may be correlated with an increased risk of larynx cancer.
authors.affiliation: Molecular Oncology Unit, Portuguese Institute of Oncology, Porto, Portugal. gvarzim@hotmail.com
authors.forename: Graça
authors.initials: G
authors.lastname: Varzim
authors.forename: Eurico
authors.initials: E
authors.lastname: Monteiro
authors.forename: Regina
authors.initials: R
authors.lastname: Silva
authors.forename: Carlos
authors.initials: C
authors.lastname: Pinheiro
authors.forename: Carlos
authors.initials: C
authors.lastname: Lopes
mesh_terms: D000123:Acetyltransferases / Q000235:genetics*; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000483:Alleles; D001191:Arylamine N-Acetyltransferase / Q000235:genetics*; D005260:Female; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D007527:Isoenzymes; D007822:Laryngeal Neoplasms / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D012150:Polymorphism, Restriction Fragment Length; D012307:Risk Factors
chemical_list: D007527:Isoenzymes; D000123:Acetyltransferases; D001191:Arylamine N-Acetyltransferase; C089384:N-acetyltransferase 1; C478900:NAT2 protein, human