Open AccessSkewed distribution of IGG FC receptor iia (CD32) polymorphism is associated with renal disease in systemic lupus erythematosus patients
Author(s) -
Duits Ashley J.,
Bootsma Hendrika,
Derksen Ronald H. W. M.,
Spronk Peter E.,
Kater Louis,
Kallenberg Cees G. M.,
Capel Peter J. A.,
Westerdaal Nomdo A. C.,
Spierenburg Gerrit T. H.,
GmeligMeyling Frits H. J.,
Van De Winkel Jan G. J.
Publication year - 1995
Publication title -
arthritis & rheumatism
Language(s) - English
Resource type - Journals
eISSN - 1529-0131
pISSN - 0004-3591
DOI - 10.1002/art.1780381217
Subject(s) - lupus nephritis , medicine , immunology , allotype , systemic lupus erythematosus , nephritis , rheumatology , lupus erythematosus , antibody , disease
Objective . Fcγ receptors of class IIa (FcγRIIa) occur in 2 allelic forms, with either a low (IIa‐R131) or a high (IIa‐H131) affinity for complexed IgG2 and IgG3. This polymorphism might have implications for the handling of immune complexes. Therefore, we determined the distribution of the Fc γRIIa allotypes in patients with systemic lupus erythematosus (SLE), with or without a history of lupus nephritis. Methods . We studied 95 unrelated white European patients with SLE, as defined by the American College of Rheumatology criteria, 50 of whom had a history of lupus nephritis, and 69 healthy white European control subjects. Fc γRIIa allotypes were determined by immunophenotyping of blood monocytes. Results . It was found that lupus nephritis was significantly associated with the ‘low affinity’ FcγRIIa R/R131 allotype and with the R131 allele, compared with healthy controls. No significant association was found upon comparison of groups with and without nephritis. Conclusion . SLE patients with a history of lupus nephritis have an abnormal distribution of FcγRIIa allotypes. FcγRIIa may well play a role in the pathogenesis of lupus nephritis, since IIa‐R/R131 SLE patients seem to have a higher incidence of developing this complication.