title: Association of interleukin-1beta polymorphism with recurrent aphthous stomatitis in Brazilian individuals.
abstract: BACKGROUND
  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. The purpose of the present study was to investigate the possible association between interleukin-1beta (IL-1beta) +3954 (C/T) genetic polymorphism and RAS in a sample of Brazilian patients.
  
  
  METHODS
  Sixty-two consecutive subjects affected by minor and major forms of RAS and 62 healthy volunteers were genotyped at IL-1beta (+3954). The chi-squared test was used for statistical analysis.
  
  
  RESULTS
  A significant increase in the high production of IL-1beta genotype CT was observed in the group with RAS (P = 0.01). After stratifying RAS patients according to the mean number of lesions per episode, a significant difference was only observed between patients with >or=3 lesions in each episode and control.
  
  
  CONCLUSIONS
  There is an increased frequency of polymorphism associated with high IL-1beta production in RAS patients.
authors.affiliation: Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.
authors.forename: A L S
authors.initials: AL
authors.lastname: Guimarães
authors.forename: A R
authors.initials: AR
authors.lastname: de Sá
authors.forename: J M N
authors.initials: JM
authors.lastname: Victória
authors.forename: J F
authors.initials: JF
authors.lastname: Correia-Silva
authors.forename: P S
authors.initials: PS
authors.lastname: Pessoa
authors.forename: M G
authors.initials: MG
authors.lastname: Diniz
authors.forename: R S
authors.initials: RS
authors.lastname: Gomez
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001938:Brazil; D016022:Case-Control Studies; D002648:Child; D003596:Cytosine; D005260:Female; D005787:Gene Frequency; D006801:Humans; D053583:Interleukin-1beta / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic; D013281:Stomatitis, Aphthous / Q000235:genetics*; D013941:Thymine
chemical_list: D053583:Interleukin-1beta; D003596:Cytosine; D013941:Thymine