IgG4 immune response in Churg–Strauss syndrome

Published on Mar 1, 2012in Annals of the Rheumatic Diseases16.102
· DOI :10.1136/ARD.2011.155382
Augusto Vaglio42
Estimated H-index: 42
(University of Parma),
Johanna D Strehl13
Estimated H-index: 13
+ 10 AuthorsJochen Zwerina60
Estimated H-index: 60
Objective T-helper type 2 responses are crucial in Churg–Strauss syndrome (CSS) and may enhance the production of IgG4 antibodies. The authors assessed the IgG4 immune response in CSS patients. Methods The authors included 46 consecutive patients with CSS (24 with active and 22 with quiescent disease), 26 with granulomatosis with polyangiitis (GPA, Wegener9s), 25 with atopic asthma and 20 healthy controls and determined serum IgG, IgM, IgA, IgE and IgG subclass levels. Tissue infiltration by IgG4 plasma cells was assessed in nine patients with CSS, 10 with GPA, 22 with chronic sinusitis (11 with and 11 without eosinophilia). Results IgG4 levels were markedly higher in active CSS patients than in controls (p −5 and p=6×10 −4 , respectively). Tissue analysis did not show an increased IgG4 plasma cell infiltration in CSS biopsies compared with control groups. Conclusions Serum IgG4 levels are markedly elevated in active CSS and correlate with the number of organ manifestations and disease activity.
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