Background & Objectives: The interleukin (IL)-17 producing T-helper cells have been linked to pathogenesis of autoimmunity and mostly investigated in rheumatoid arthritis (RA). In this study we tested the IL-17 levels, as well as the levels of nitric oxide (NO) as possible IL-17-induced product, in patients with primary Sjögren's syndrome (pSS), an intricate and complex chronic autoimmune disorder of exocrine glands.
Methods: Serum IL-17 levels and nitrite concentrations determined in patients with pSS (n=30) were compared with the values obtained in patients with RA (n=10) and healthy controls (n=15).