Dendritic Cell Stimulation by IFN-β Alters T Cell Function via Modulation of Cytokine Secretion in Diabetes Type 1
During antigen capture and processing, mature dendritic cells (DC) express large amounts of peptide-MHC complexes and accessory molecules on their surface. We investigated the role of IFN-β in induction HLA-G expression on the monocyte derived DC and cytokine profile in diabetes type 1. We accomplished secretary pattern and total cytokine production of the Th1 cytokine (IL-2, γIFN) and Th2 cytokines (IL-4, IL-10) before and after mixed leukocyte reaction (MLR) of 30 diabetic patients and 30 normal subjects. In this study a significant increase of IL-10 and γIFN reduction after IFN-β Therapy in culture in presence of HLA-G bearing DC as compared to control were seen. It is seen that dendritic cell causes IL-10 production of T cell in vitro that reduce T cell activation from diabetes patients and normal subjects resulted to the production and expression of HLA-G on these cells from both groups. Using mixed leukocyte reaction, it was found that IFN-β-treated dendritic cell mediated the inhibition of autologous T cell activation via IL-10 production and level of HLA-G on dendritic cell may be correlated to disease activity in diabetes patients and it could also serve as a useful marker for disease progress and treatment.
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