Janneke J. de Winter, Marleen G. van de Sande, Niklas Baerlecken, Inger Berg, Roberta Ramonda, Désirée van der Heijde, Floris A. van Gaalen, Torsten Witte, Dominique L. Baeten
Abstract:BackgroundAnti-CD74 IgG antibodies are reported to be elevated in patients with axial spondyloarthritis (axSpA). This study assessed the diagnostic value of anti-CD74 antibodies in patients with early axSpA.MethodsAnti-CD74 IgG and IgA antibodies were first measured in an exploratory cohort of patients with radiographic axSpA (138 patients with ankylosing spondyloarthritis (AS)) and 57 healthy controls and then were measured in patients with early axSpA (n = 274) and with non-SpA chronic back pain (CBP) (n = 3…
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