Multireactive pattern of serum autoantibodies in asymptomatic individuals with immunoglobulin A deficiency

N. Barka, G. Q. Shen, Y. Shoenfeld, I. J. Alosachie, M. Eric Gershwin, H. Reyes, J. B. Peter

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

Selective immunoglobulin A (IgA) deficiency (sIgAD) is associated with certain autoimmune states. Increased production of autoantibodies and eventual development of overt autoimmune disease are related in part to genetic and environmental factors as well as to the immune deficiency. We surveyed serum specimens from 60 healthy subjects with sIgAD for the presence of 21 different autoantibodies by enzyme-linked immunosorbent assays. The frequencies of 16 autoantibodies were higher in sIgAD patients than in normal healthy controls. Autoantibodies to Jo-1 (28%), cardiolipin (21%), phosphatidylserine (20%), Sm (15%), asialo-GM1 (21%), sulfatide (32%), sulfoglucuronyl paragloboside (11%), and collagen type I (10%) were detected at high frequencies in comparison to those of normal healthy controls. Many of the serum samples were multireactive (i.e., exhibited binding to more than two autoantigens). Forty percent (24 of 60) of sIgAD serum samples reacted against six or more autoantigens; 10% (6 of 60) of sIgAD serum samples were not reactive with any of the 21 autoantigens. Three percent (7 of 209) of consecutive serum samples submitted for autoimmune antibody analysis that were positive for autoantibodies were from patients with IgA deficiency. Our finding of an increased frequency of autoantibodies in sIgAD patients supports the notion of polyclonal stimulation by repeated environmental stimuli as an etiologic mechanism. Alternatively, the increased frequency may be caused by a dysregulation of the immune response in guch,individuals. The mere detection of autoantibodies cannot predict whether a subject with sIgAD will develop an autoimmune disease or determine which specific disease will emerge.

Original languageEnglish (US)
Pages (from-to)469-472
Number of pages4
JournalClinical and Diagnostic Laboratory Immunology
Volume2
Issue number4
StatePublished - 1995
Externally publishedYes

ASJC Scopus subject areas

  • Clinical Biochemistry
  • Immunology
  • Immunology and Allergy
  • Microbiology (medical)

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