title: Transferable anergy: superantigen treatment induces CD4+ T cell tolerance that is reversible and requires CD4-CD8- cells and interferon gamma.
abstract: Bacterial superantigens induce peripheral unresponsiveness in CD4+ T cell populations that express appropriate Vbeta chains. We have used Vbeta3/Valpha11 T cell receptor transgenic (Tg) mice and the Vbeta3-specific superantigen staphylococcal enterotoxin A (SEA) to further investigate the mechanisms that contribute to such unresponsiveness. As in other models, in vivo exposure to SEA rendered the Tg CD4+ cells unresponsive to subsequent restimulation in vitro with antigen or mitogens. However, when the SEA-treated CD4+ cells were completely purified away from all other contaminating cells, they regained the ability to proliferate and secrete cytokines. Moreover, enriched CD4-CD8- cells from the SEA-treated mice suppressed the responses of fresh control CD4+ cells in mixed cultures indicating that the apparent "anergy" was both transferable and reversible. Further analysis demonstrated that interferon gamma, but not the Fas receptor, played a critical role in the suppression.
authors.affiliation: Trudeau Institute, Saranac Lake, New York 12983, USA.
authors.forename: L S
authors.initials: LS
authors.lastname: Cauley
authors.forename: K A
authors.initials: KA
authors.lastname: Cauley
authors.forename: F
authors.initials: F
authors.lastname: Shub
authors.forename: G
authors.initials: G
authors.lastname: Huston
authors.forename: S L
authors.initials: SL
authors.lastname: Swain
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000276:immunology; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology* / Q000473:pathology; D004768:Enterotoxins / Q000276:immunology*; D005434:Flow Cytometry; D007111:Immunity, Cellular; D007371:Interferon-gamma / Q000276:immunology*; D051379:Mice; D008822:Mice, Transgenic; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000235:genetics / Q000276:immunology; D013211:Staphylococcus aureus / Q000276:immunology*; D018089:Superantigens / Q000276:immunology*
chemical_list: D004768:Enterotoxins; D016693:Receptors, Antigen, T-Cell, alpha-beta; D018089:Superantigens; C026066:enterotoxin A, Staphylococcal; D007371:Interferon-gamma