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Urs Christen, Kurt H. Edelmann, Dorian B. McGavern, Tom Wolfe, Bryan Coon, Meghann K. Teague, Stephen D. Miller, Michael B.A. Oldstone, Matthias G. von Herrath
J Clin Invest. 2004;
114(9):1290
doi:10.1172/JCI22557
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e document here that infection of prediabetic mice with a virus expressing an H-2Kb–restricted mimic ligand to a self epitope present on β cells accelerates the development of autoimmune diabetes. Immunization with the mimic ligand expanded autoreactive T cell populations, which was followed by their trafficking to the islets, as visualized in situ by tetramer staining. In contrast, the mimic ligand did not generate sufficient autoreactive T cells in naive mice to initiate disease. Diabetes acceleration did not occur in H-2Kb–deficient mice or in mice tolerized to the mimic ligand. Thus, arenavirus-expressed mimics of self antigens accelerate a previously established autoimmune process. Sequential heterologous viral infections might therefore act in concert to precipitate clinical autoimmune disease, even if single exposure to a viral mimic does not always cause sufficient tissue destruction.
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