Skewed Fc glycosylation profiles of anti-proteinase 3 immunoglobulin G1 autoantibodies from granulomatosis with polyangiitis patients show low levels of bisection, galactosylation, and sialylation.

Abstract

Granulomatosis with polyangiitis (GPA) is associated with circulating immunoglobulin (Ig) G anti-proteinase 3 specific (anti-PR3) anti-neutrophil cytoplasm antibodies (ANCA), which activate cytokine primed neutrophils via Fcgamma receptors. ANCA are class switched IgG antibodies implying T cell help in their production. Glycosylation of IgG Fc, under the… (More)
DOI: 10.1021/pr500780a

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