title: Early activation and cell trafficking induced by staphylococcal enterotoxin B: effects of high- versus low-dose challenge on induction of anergy.
abstract: The in vivo challenge with exogenous superantigen, staphylococcal enterotoxin B (SEB), selectively induces vigorous polyclonal proliferation of T cells bearing the V beta 8+ TcR domain, whereafter the responsive cells become anergic. We used kinetic analyses to compare the effects of primary (1 degree) and secondary (2 degrees) challenge with a high and a low dose of SEB and the conventional antigen, sperm whale myoglobin, to determine the differential effects of in vivo challenge with a superantigen compared with a conventional antigen. We demonstrate that SEB induces very early activation-associated intralymphatic proliferation and trafficking of more T cells than can be accounted for by V beta 8+ T cells alone. Overall, this study indicates that challenge with SEB causes an apparent loss of CD4+ T-helper cell function and provides an essential foundation for the understanding of the mechanisms of peripheral tolerance induction and T cell "memory."
authors.affiliation: Upjohn Company, Kalamazoo, Michigan 49001.
authors.forename: S J
authors.initials: SJ
authors.lastname: Bell
authors.forename: S M
authors.initials: SM
authors.lastname: Vroegop
authors.forename: S E
authors.initials: SE
authors.lastname: Buxser
mesh_terms: D000818:Animals; D004306:Dose-Response Relationship, Immunologic; D004768:Enterotoxins / Q000276:immunology*; D005260:Female; D007376:Interleukin-2 / Q000494:pharmacology; D007958:Leukocyte Count; D008213:Lymphocyte Activation; D051379:Mice; D008807:Mice, Inbred BALB C; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000032:analysis; D017634:Self Tolerance; D013211:Staphylococcus aureus / Q000276:immunology*; D018089:Superantigens / Q000276:immunology*
chemical_list: D004768:Enterotoxins; D007376:Interleukin-2; D016693:Receptors, Antigen, T-Cell, alpha-beta; D018089:Superantigens; C031818:enterotoxin B, staphylococcal