Journal article

Profiling of IgG antibodies targeting unmodified and corresponding citrullinated autoantigens in a multicenter national cohort of early arthritis in Germany

Stefan Vordenbaeumen, Ralph Brinks, Patrick Schriek, Angelika Lueking, Jutta G Richter, Petra Budde, Peter Schulz-Knappe, Hans-Dieter Zucht, Johanna Callhoff, Matthias Schneider

Arthritis Research and Therapy | BMC | Published : 2020

Abstract

OBJECTIVE: To assess the diagnostic potential of IgG antibodies to citrullinated and corresponding native autoantigens in early arthritis. METHODS: IgG autoantibodies to 390 distinct unmodified and corresponding in vitro citrullinated recombinant proteins were measured by a multiplex assay in baseline blood samples from a German multicenter national cohort of 411 early arthritis patients (56.5 ± 14.6 years, 62.8% female). The cohort was randomly split into a training cohort (n = 329, 28.6% ACPA positive) and a validation cohort (n = 82, 32.9% ACPA pos.). The diagnostic properties of candidate antibodies to predict a subsequent diagnosis of rheumatoid arthritis (RA) as opposed to a non-RA dia..

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