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Open Access

Tumor necrosis factor-alpha polymorphism and susceptibility to juvenile idiopathic arthritis

  • S Bayraktar1,
  • O Kasapcopur1,
  • N Arisoy1,
  • B Batar1 and
  • M Guven1
Pediatric Rheumatology20086(Suppl 1):P6

Published: 15 September 2008


Allele FrequencyLength PolymorphismRestriction Fragment Length PolymorphismRestriction FragmentFragment Length Polymorphism


Juvenile idiopathic arthritis (JIA) is a complex, multifactorial and chronic inflammatory disease of unknown etiology with considerable variability in which tumor necrosis factor-alpha (TNF-α) plays an important role. Both genetic and environmental factors can contribute to a susceptibility to disease initiation as well as a severity of disease course. TNF-α polymorphisms may be an independent marker of susceptibility and severity of JIA. The aim of this study was to elucidate putative association between the -863 C/A polymorphism in the promoter region of the TNF-a gene and susceptibility to onset and severity of JIA.


We used PCR-RFLP (polymerase chain reaction – restriction fragment length polymorphism) method to detect the -863 C/A polymorphism. We analyzed DNA samples from 76 patients with JIA and 80 healthy individuals.


The distribution of TNF-α genotypes in cases differed significantly from that in the controls, comparing TNF-α A carriers (CA or AA genotypes) with noncarriers (CC genotype) (OR = 2.49; 95% CI: 1.21–5.14; P = 0.01). However, TNF-α -863 C/A allele frequencies were not significantly different between cases and controls.


The TNF-α CC genotype was associated with increased risk factor for JIA in a sample of Turkish patients.

Authors’ Affiliations

Istanbul University, Cerrahpasa Medical School, Istanbul, Turkey


© Bayraktar et al; licensee BioMed Central Ltd. 2008

This article is published under license to BioMed Central Ltd.