Interleukin 10 (IL-10) influences autoimmune response in primary Sjogren's syndrome and is linked to IL-10 gene polymorphism. Academic Article

abstract

  • OBJECTIVE: To investigate the association between serum levels of interleukin 10 (IL-10), the synthesis of autoantibodies, salivary gland disease activity, clinical manifestations, and IL-10 microsatellite polymorphism in patients with primary Sjogren's syndrome (pSS)., METHODS: Serum IL-10 and autoantibody levels [IgG anti-Ro and anti-La, total and IgA rheumatoid factor (RF)] were measured by ELISA. A minor salivary gland (MSG) biopsy was performed in all patients and the focus score was determined as a measure of salivary gland disease activity. In addition, IL-10 microsatellite typing was performed by polymerase chain reaction technique., RESULTS: IL-10 concentration was higher in patients (n = 39) than in controls (n = 15) (21.4 +/- 6.7 vs 2.5 +/- 3.5 pg/ml; p = 0.001). We found a significant positive correlation between IL-10 levels and titers of IgA RF, anti-Ro, and anti-La antibodies, as well as focus score. In comparison with patients with low IL-10 production (<9.5 pg/ml), patients producing high IL-10 had significantly more episodes of cutaneous vasculitis and a higher proportion of them carried the IL-10.G9 allele., CONCLUSION: Autoimmune response in pSS patients as well as salivary gland disease activity and cutaneous involvement appears to be mediated by IL-10 levels; in turn, there is a linkage with IL-10 gene polymorphism.

publication date

  • 2002/1/1

edition

  • 29

keywords

  • Alleles
  • Anti-Idiotypic Antibodies
  • Autoantibodies
  • Autoimmunity
  • Biopsy
  • Enzyme-Linked Immunosorbent Assay
  • Genes
  • Immunoglobulin A
  • Interleukin-10
  • Microsatellite Repeats
  • Minor Salivary Glands
  • Polymerase Chain Reaction
  • Rheumatoid Factor
  • Salivary Gland Diseases
  • Serum
  • Sjogren's Syndrome
  • Skin
  • Vasculitis
  • anti-IgG

International Standard Serial Number (ISSN)

  • 0315-162X

number of pages

  • 3

start page

  • 1874

end page

  • 1876