title: The distribution of the Qa-2 alloantigen on functional T lymphocytes.
abstract: The expression of Qa-2 on functional lymphocytes was investigated in vitro and in vivo by using a monoclonal anti-Qa-2 antibody. In vitro treatment of T cells with antibody and complement demonstrated that T cells mediating help or delayed-type hypersensitivity for anti-SRBC responses were Qa-2+. In addition, cytotoxic T cells and either their precursors or cells involved in their generation were Qa-2+, as were anti-HGG suppressor T cells. Panning techniques were also used to show that secondary suppressor T cells were Qa-2+ and that there may be heterogeneity in suppressor T cells defined by Qa-2 expression. In vivo treatment of mice with anti-Qa-2 resulted in decrease in immune responsiveness seen by i) prolongation of skin grafts with either H-2D or I-A differences, ii) suppression of delayed-type hypersensitivity, and iii) inhibition of T cell-mediated suppression. Finally, IgG, but not IgM, anti-body-forming cells were Qa-2+.
authors.forename: P M
authors.initials: PM
authors.lastname: Hogarth
authors.forename: A
authors.initials: A
authors.lastname: Basten
authors.forename: H
authors.initials: H
authors.lastname: Prichard-Briscoe
authors.forename: M H
authors.initials: MH
authors.lastname: Henning
authors.forename: V R
authors.initials: VR
authors.lastname: Sutton
authors.forename: I F
authors.initials: IF
authors.lastname: McKenzie
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal; D000921:Antibody-Producing Cells / Q000276:immunology*; D000950:Antigens, Ly / Q000276:immunology; D000954:Antigens, Surface / Q000276:immunology*; D004912:Erythrocytes / Q000276:immunology; D006085:Graft Survival; D015395:Histocompatibility Antigens Class I; D006968:Hypersensitivity, Delayed / Q000276:immunology; D007108:Immune Tolerance; D007074:Immunoglobulin G / Q000096:biosynthesis; D007075:Immunoglobulin M / Q000096:biosynthesis; D007156:Immunologic Memory; D051379:Mice; D008815:Mice, Inbred Strains; D013601:T-Lymphocytes / Q000145:classification / Q000276:immunology*; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology; D050378:T-Lymphocytes, Regulatory / Q000276:immunology
chemical_list: D000911:Antibodies, Monoclonal; D000950:Antigens, Ly; D000954:Antigens, Surface; D015395:Histocompatibility Antigens Class I; D007074:Immunoglobulin G; D007075:Immunoglobulin M; C032907:Q surface antigens