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We studied dipeptidyl peptidase IV (DPP-IV, CD26) expression in different T helper cells and serum soluble DPP-IV/sCD26 levels in rheumatoid arthritis (RA) patients, correlated these with disease activity score (DAS), and examined how they were affected by different therapies, conventional or biological (anti-TNF, anti-CD20 and anti-IL6R or Ig-CTLA4). The… (More)
OBJECTIVES Rheumatoid arthritis (RA) patients show low serum levels of the Ag dipeptidyl peptidase IV (DPP-IV/CD26), both soluble CD26 (sCD26) concentration and its DPP-IV activity. The aim of this study was to test if anti-DPP-IV/CD26 Abs (Anti-CD26) cleared sCD26. DESIGN & METHODS Serum Anti-CD26 and Total titers (as comparison) of isotypes IgA, IgM and… (More)