title: Immunological unresponsiveness characterized by increased expression of CD5 on peripheral T cells induced by dendritic cells in vivo.
abstract: In the steady state, interaction between T cells and antigen-presenting dendritic cells (DCs) leads to T cell tolerance. To examine the role of DC regulated peripheral tolerance in a model autoimmune disease, we delivered an encephalitogenic oligodendrocyte glycoprotein (MOG) peptide to DCs in vivo. We found that targeting MOG peptide to DCs resulted in a novel form of peripheral T cell tolerance that was sufficiently profound to prevent autoimmune experimental acute encephalomyelitis (EAE). The tolerized T cells were severely impaired in specific secondary responses to antigen in vivo but they were not intrinsically anergic since they remained highly responsive to T cell receptor (TCR) stimulation in vitro. The mechanism that mediates this dynamic antigen-specific T cell unresponsiveness differs from previously described forms of tolerance in that it requires that DCs induce CD5 expression on activated T cells.
authors.affiliation: Laboratory of Molecular Immunology, The Rockefeller University, New York, NY 10021 USA.
authors.forename: Daniel
authors.initials: D
authors.lastname: Hawiger
authors.forename: Revati F
authors.initials: RF
authors.lastname: Masilamani
authors.forename: Estelle
authors.initials: E
authors.lastname: Bettelli
authors.forename: Vijay K
authors.initials: VK
authors.lastname: Kuchroo
authors.forename: Michel C
authors.initials: MC
authors.lastname: Nussenzweig
mesh_terms: D000818:Animals; D018956:CD5 Antigens / Q000378:metabolism*; D002460:Cell Line; D003713:Dendritic Cells / Q000276:immunology*; D004681:Encephalomyelitis, Autoimmune, Experimental / Q000276:immunology; D005260:Female; D005434:Flow Cytometry; D006801:Humans; D007108:Immune Tolerance; D051379:Mice; D009185:Myelin Proteins; D018992:Myelin-Associated Glycoprotein / Q000235:genetics / Q000378:metabolism; D063308:Myelin-Oligodendrocyte Glycoprotein; D013601:T-Lymphocytes / Q000276:immunology* / Q000378:metabolism*; D019076:Transgenes / Q000235:genetics
chemical_list: D018956:CD5 Antigens; C571326:MOG protein, human; C571327:Mog protein, mouse; D009185:Myelin Proteins; D018992:Myelin-Associated Glycoprotein; D063308:Myelin-Oligodendrocyte Glycoprotein