title: T cell tolerance to Mlsa encoded antigens in T cell receptor V beta 8.1 chain transgenic mice.
abstract: To study T cell tolerance, transgenic mice were generated that expressed the Mlsa-reactive T cell receptor (TCR) beta chain V beta 8.1 (cDNA) under the control of the H-2Kb promoter/immunoglobulin heavy chain enhancer on approximately 90% of peripheral T cells. In transgenic mice bearing Mlsa, thymocytes expressing the TCR at a high density were deleted and the percentage of Thy 1.2+ lymph node cells was reduced. The CD4/CD8 ratio of mature T cells was reversed in Mlsa and Mlsb transgenic mice independent of the H-2. RNA analysis and immunofluorescence with TCR V beta-specific antibodies revealed that expression of endogenous TCR beta genes was suppressed. Both Mlsa and Mlsb TCR beta chain transgenic mice mounted a T-cell-dependent IgG response against viral antigens, whereas the capacity to generate alloreactive and virus-specific cytotoxic T cells was impaired in TCR beta chain transgenic Mlsa, but not in transgenic Mlsb mice.
authors.affiliation: Department of Experimental Pathology, University Hospital, Zürich, Switzerland.
authors.forename: H
authors.initials: H
authors.lastname: Pircher
authors.forename: T W
authors.initials: TW
authors.lastname: Mak
authors.forename: R
authors.initials: R
authors.lastname: Lang
authors.forename: W
authors.initials: W
authors.lastname: Ballhausen
authors.forename: E
authors.initials: E
authors.lastname: Rüedi
authors.forename: H
authors.initials: H
authors.lastname: Hengartner
authors.forename: R M
authors.initials: RM
authors.lastname: Zinkernagel
authors.forename: K
authors.initials: K
authors.lastname: Bürki
mesh_terms: D000818:Animals; D000945:Antigens, Differentiation, T-Lymphocyte; D000954:Antigens, Surface / Q000276:immunology*; D016827:CD8 Antigens; D004742:Enhancer Elements, Genetic; D005786:Gene Expression Regulation; D005803:Genes, Immunoglobulin; D007108:Immune Tolerance; D051379:Mice; D008822:Mice, Transgenic; D016747:Minor Lymphocyte Stimulatory Antigens; D011948:Receptors, Antigen, T-Cell / Q000235:genetics / Q000276:immunology*; D016693:Receptors, Antigen, T-Cell, alpha-beta; D013601:T-Lymphocytes / Q000145:classification / Q000276:immunology*
chemical_list: D000945:Antigens, Differentiation, T-Lymphocyte; D000954:Antigens, Surface; D016827:CD8 Antigens; D016747:Minor Lymphocyte Stimulatory Antigens; D011948:Receptors, Antigen, T-Cell; D016693:Receptors, Antigen, T-Cell, alpha-beta