title: Derivation from an alloreactive T-cell line of a clone which cross-reacts with a self H2-E-restricted minor alloantigen.
abstract: An alloreactive T-helper-cell line [(A.TH X Balb/c) anti-A.TL] was shown to recognize both H2-Ek and H2-Ed. Both proliferation and polyclonal B-cell activation (protein A plaques) were used in the analyses of specificity. On cloning, the H2-Ek/Ed cross-reaction was shown by one clonotype. This cross-reaction is interpreted in light of the P. Matzinger and M.J. Bevan model (Cell. Immunol. 29, 1, 1977) for antigen recognition by T cells. The antigen recognized was a cell surface non-major histocompatibility (MHC) (minor) alloantigen, shared by the DBA and B10 backgrounds, whose recognition was H2-Ed restricted. This clone is therefore both alloreactive and self-MHC (Ed) restricted minor reactive. Other clones from the cell line were either allospecific or autoreactive. It was shown by antibody blocking that the H2-E alpha (Ia7) determinants involved in the cross-reactive and allospecific recognition were not the same. By antibody blocking it was also shown that the antigenic determinant recognized by the autoreactive clone included H2-Ed. The alloreactive cell line therefore contained three H2-E-reactive clonotypes: allo-Ek specific, H2-Ek and DBA/B10 minor plus H2-Ed cross-reactive, and Ed-associated autoreactive.
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology / Q000502:physiology; D000954:Antigens, Surface / Q000235:genetics; D001324:Autoantigens / Q000235:genetics / Q000276:immunology; D001667:Binding, Competitive; D002460:Cell Line; D002999:Clone Cells / Q000276:immunology; D003429:Cross Reactions; D006183:H-2 Antigens / Q000235:genetics* / Q000276:immunology; D006238:Haploidy; D000949:Histocompatibility Antigens Class II / Q000276:immunology; D008213:Lymphocyte Activation; D051379:Mice; D008805:Mice, Inbred A; D008806:Mice, Inbred AKR; D008807:Mice, Inbred BALB C; D008809:Mice, Inbred C3H; D008810:Mice, Inbred C57BL; D008808:Mice, Inbred CBA; D008811:Mice, Inbred DBA; D008912:Minor Histocompatibility Loci; D010641:Phenotype; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D000954:Antigens, Surface; D001324:Autoantigens; D006183:H-2 Antigens; D000949:Histocompatibility Antigens Class II