Bryan Coon, Ling-Ling An, J. Lindsay Whitton, Matthias G. von Herrath
J Clin Invest.
1999;
104(2):189–194
doi:10.1172/JCI7209
This article Copyright © 1999, The American Society for Clinical Investigation
Abstract
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M
ice expressing lymphocytic choriomeningitis virus nucleoprotein (LCMV-NP) as a transgene in their β cells develop insulin-dependent diabetes mellitus (IDDM) only after LCMV infection. Inoculation of plasmid DNA encoding the insulin B chain reduced the incidence of IDDM by 50% in this model. The insulin B-chain DNA vaccination was effective through induction of regulatory CD4 lymphocytes that react with the insulin B chain, secrete IL-4, and locally reduce activity of LCMV-NP–autoreactive cytotoxic T lymphocytes in the pancreatic draining lymph node. In contrast, similar vaccination with plasmids expressing the LCMV viral (“self”) protein did not prevent IDDM, because no such regulatory cells were induced. Thus, DNA immunization with plasmids expressing self-antigens might constitute a novel and attractive therapeutic approach to prevent autoimmune diseases, if the antigens are carefully preelected for an ability to induce regulatory lymphocytes in vivo.
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