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Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 J+Immunol 2017 ; 199 (1): 91-6 Nephropedia Template TP
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Antigen specific T cell analysis reveals active immune responses to beta cell antigens are focused on a unique set of epitopes1 #MMPMID28550202
J Immunol 2017[Jul]; 199 (1): 91-6 PMID28550202show ga
CD38 is an activation marker that is present on recently activated T cells, but absent on resting memory T cells. In this study, we show that CD45RO+CD38+ beta cell antigen-specific CD4+ T cells were present at higher frequencies in T1D subjects compared to those in healthy subjects. These results imply an ongoing beta cell immunity years after onset of diabetes and suggest these activated T cells have an active role in the disease process. The antigen specificities of these activated T cells were determined by a novel CD154 T cell epitope mapping assay. While each patient usually had a unique set of epitopes recognized by these T cells, two epitopes, DR0401 restricted modified preproinsulin peptide (PPI78-90K88S) and ZnT266-285, were repeatedly identified in multiple subjects. Identifying these T cells and their specific antigenic epitopes might provide immunotherapeutic targets for personalized therapies.