title: Investigation of functional gene polymorphisms IL-1beta, IL-6, IL-10 and TNF-alpha in individuals with recurrent aphthous stomatitis.
abstract: Recurrent aphthous stomatitis (RAS) is characterized by recurrent episodes of oral ulceration in an otherwise healthy individual. Some reports in the literature indicate that RAS may have immunological, psychological, genetic and microbiological bases.
  
  
  OBJECTIVE
  The purpose of the present study was to investigate, using binary logistic regression analyses, a possible association between the functional IL-1beta +3954 (C/T), IL-6 -174 (G/C), IL-10 -1082 (G/A) and TNF-alpha -308 (G/A) genetic polymorphism and RAS in a sample of Brazilian patients, using a multivariate statistical analysis.
  
  
  METHODS
  Sixty-four consecutive subjects affected by minor and major forms of RAS and 64 healthy volunteers were genotyped. To investigate the association between the single nucleotide polymorphisms and risk of RAS, binary logistic regression models were fitted. The associations were expressed by odd ratios (ORs) and adjusted for age and gender, with the corresponding 95% CIs. P-values less than 0.05 were considered significant.
  
  
  RESULTS
  A significant increase in the IL-1beta and TNF-alpha heterozygous genotypes were associated with an increased risk of RAS development (OR 2.40 and 3.07, respectively), in the multivariate model.
  
  
  CONCLUSIONS
  Our findings demonstrate that polymorphisms of high IL-1beta and TNF-alpha production were associated with an increased risk of RAS development. Our findings also give additional support to a genetic basis for RAS pathogenesis.
authors.affiliation: Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal, de Minas Gerais, Belo Horizonte, Brazil.
authors.forename: André Luiz Sena
authors.initials: AL
authors.lastname: Guimarães
authors.forename: Jeane de Fátima
authors.initials: Jde F
authors.lastname: Correia-Silva
authors.forename: Alessandra Rosa de
authors.initials: AR
authors.lastname: Sá
authors.forename: Junia Maria Netto
authors.initials: JM
authors.lastname: Victória
authors.forename: Marina Gonçalves
authors.initials: MG
authors.lastname: Diniz
authors.forename: Fernando de Oliveira
authors.initials: Fde O
authors.lastname: Costa
authors.forename: Ricardo Santiago
authors.initials: RS
authors.lastname: Gomez
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D005787:Gene Frequency / Q000235:genetics; D020022:Genetic Predisposition to Disease / Q000235:genetics; D005838:Genotype; D006801:Humans; D016753:Interleukin-10 / Q000235:genetics*; D053583:Interleukin-1beta / Q000235:genetics*; D015850:Interleukin-6 / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D011110:Polymorphism, Genetic / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide / Q000235:genetics; D012008:Recurrence; D013281:Stomatitis, Aphthous / Q000235:genetics*; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics*
chemical_list: D053583:Interleukin-1beta; D015850:Interleukin-6; D014409:Tumor Necrosis Factor-alpha; D016753:Interleukin-10