Antibodies against alpha-fodrin are associated with sicca syndrome in the general population

Ann N Y Acad Sci. 2007 Jun:1108:414-7. doi: 10.1196/annals.1422.043.

Abstract

The significance of antibodies against alpha-fodrin compared to antibodies against Ro (SSA) as markers of Sjögren's syndrome has been controversially discussed. We therefore compared the association of alpha-fodrin and Ro antibodies with dry eyes and dry mouth in the general population. In 168 "normal" participants, the prevalence of IgA antibodies against alpha-fodrin was 5% and of IgG antibodies against alpha-fodrin was 3%. IgA antibodies against alpha-fodrin were present in 3 of 4 and IgG antibodies against alpha-fodrin in 2 of 4 participants with the combination of dry eyes and dry mouth (P = 0.0002 and 0.005). Only one participant had antibodies against Ro and had dry eyes but normal saliva production. Antibodies against alpha-fodrin are associated with sicca syndrome and may be valuable diagnostic markers in patients with Sjögren's syndrome lacking Ro antibodies.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antibodies, Antinuclear / blood
  • Autoantibodies / blood*
  • Autoantigens / immunology*
  • Biomarkers / blood*
  • Carrier Proteins / immunology*
  • Dry Eye Syndromes / epidemiology
  • Dry Eye Syndromes / etiology
  • Humans
  • Microfilament Proteins / immunology*
  • Sjogren's Syndrome / blood*
  • Sjogren's Syndrome / epidemiology
  • Sjogren's Syndrome / immunology*
  • Xerostomia / epidemiology
  • Xerostomia / etiology

Substances

  • Antibodies, Antinuclear
  • Autoantibodies
  • Autoantigens
  • Biomarkers
  • Carrier Proteins
  • Microfilament Proteins
  • SS-A antibodies
  • fodrin