title: Polymorphisms in the IL-10 and IL-12 gene cluster and risk of developing recurrent aphthous stomatitis.
abstract: BACKGROUND
  Recurrent aphthous stomatitis (RAS) is a common, painful, ulcerative condition of the mouth. Although there is no clear genetic mode of inheritance, there is evidence that inheritance of specific gene polymorphisms may predispose individuals to RAS. AlsoTh1 cell mediated immune responses under the control of IL-10/IL-12 are thought to play an important role in its pathogenesis.
  
  
  OBJECTIVE
  The objective of this study was to investigate the possibility that susceptibility to RAS is associated with the inheritance of specific gene polymorphisms for the T cell regulatory cytokines interleukin-10 (IL-10) and interleukin-12 (IL-12).
  
  
  METHODS
  One hundred RAS patients and 91 ethnically matched controls were genotyped for the IL-10-592, and -1082 polymorphisms, and the IL-12 1188 polymorphism. Chi-square analysis was used to compare the allele frequencies and genotypes of cases and controls.
  
  
  RESULTS
  No significant association was identified between inheritance of specific alleles or genotypes of the IL-10-592 and -1082 polymorphisms or IL-12 1188 polymorphism and susceptibility to RAS.
  
  
  CONCLUSIONS
  We were unable to demonstrate an association between the inheritance of specific IL-10 or IL-12 gene polymorphisms and RAS susceptibility.
authors: ARC Epidemiology Unit, University of Manchester, Manchester, UK.
authors: M R
authors: MR
authors: Bazrafshani
authors: A H
authors: AH
authors: Hajeer
authors: W E R
authors: WE
authors: Ollier
authors: M H
authors: MH
authors: Thornhill
mesh_terms: D000328:Adult; D000483:Alleles; D016022:Case-Control Studies; D016009:Chi-Square Distribution; D005260:Female; D005787:Gene Frequency / Q000235:genetics; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D016753:Interleukin-10 / Q000235:genetics*; D018664:Interleukin-12 / Q000235:genetics*; D008297:Male; D011110:Polymorphism, Genetic / Q000235:genetics*; D012008:Recurrence; D012307:Risk Factors; D013281:Stomatitis, Aphthous / Q000235:genetics* / Q000276:immunology
chemical_list: D016753:Interleukin-10; D018664:Interleukin-12