Cutting edge: myelin basic protein-specific cytotoxic T cell tolerance is maintained in vivo by a single dominant epitope in H-2k mice.
Multiple sclerosis (MS) is believed to be an autoimmune disease mediated by T cells specific for CNS Ags. MS lesions contain both CD4+ and CD8+ T lymphocytes. The contribution of CD4+ T cells to CNS autoimmune disease has been extensively studied in an animal model of MS, experimental autoimmune encephalomyelitis. However, little is known about the role of autoreactive CD8+ cytotoxic T cells in MS or experimental autoimmune encephalomyelitis. We demonstrate here that myelin basic protein (MBP) is processed in vivo by the MHC class I pathway leading to a MBP79-87/Kk complex. The recognition of this complex by MBP-specific cytotoxic T cells leads to a high degree of tolerance in vivo. This study is the first to show that the pool of self-reactive lymphocytes specific for MBP contain MHC class I-restricted T cells whose response is regulated in vivo by the induction of tolerance.
Department of Immunology, University of Washington, Seattle 98195, USA.
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Huseby
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Ohlén
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Goverman
D000483:Alleles; D000818:Animals; D003601:Cytotoxicity Tests, Immunologic; D018984:Epitopes, T-Lymphocyte / Q000235:genetics / Q000276:immunology* / Q000302:isolation & purification; D006183:H-2 Antigens / Q000235:genetics / Q000276:immunology*; D007108:Immune Tolerance / Q000235:genetics; D016056:Immunodominant Epitopes / Q000235:genetics / Q000276:immunology* / Q000302:isolation & purification; D007739:L Cells; D008213:Lymphocyte Activation; D051379:Mice; D008805:Mice, Inbred A; D008809:Mice, Inbred C3H; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D004676:Myelin Basic Protein / Q000008:administration & dosage / Q000276:immunology*; D010446:Peptide Fragments / Q000008:administration & dosage; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology* / Q000378:metabolism
D018984:Epitopes, T-Lymphocyte; D006183:H-2 Antigens; C024755:H-2K(K) antigen; D016056:Immunodominant Epitopes; D004676:Myelin Basic Protein; D010446:Peptide Fragments; C112836:myelin basic protein 79-87