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Title: Increased expression of IL-22 is associated with disease activity in Behcet's disease. Author: Cai T, Wang Q, Zhou Q, Wang C, Hou S, Qi J, Kijlstra A, Yang P. Journal: PLoS One; 2013; 8(3):e59009. PubMed ID: 23527071. Abstract: OBJECTIVE: Interleukin (IL)-22 has been reported to be involved in the development of autoimmune diseases. This study aimed to analyze the expression and potential role of IL-22 in the pathogenesis of Behcet's disease (BD). METHODS: The levels of IL-22 in patient sera or supernatants of cultured peripheral blood mononuclear cells (PBMCs) and CD4(+)T cells were detected by enzyme-linked immunosorbent assay (ELISA). Flow cytometry was used to evaluate the frequency of IL-22-producing CD4(+) T cells. IL-22 mRNA from erythema nodosum skin lesions was examined using real time quantitative RT-PCR. RESULTS: BD patients with active uveitis showed a significantly higher expression of IL-22 in the supernatants of stimulated PBMCs and CD4(+)T cells compared with BD patients without active uveitis and normal controls. An increased frequency of IL-22-producing CD4(+)T cells was also found in BD patients with active uveitis. IL-22 mRNA expression was elevated in erythema nodosum skin lesions. In BD patients, a high IL-22 level in the supernatant of stimulated PBMCs correlated with the presence of retinal vasculitis and erythema nodosum. CONCLUSIONS: IL-22 was associated with disease activity in BD and correlated with the presence of small vessel inflammation, suggesting that it may be involved in its pathogenesis.[Abstract] [Full Text] [Related] [New Search]