title: Differential inhibition of human antigen-specific T cell clone proliferative responses by distinct monoclonal anti-HLA-DR antibodies.
abstract: The inhibition of diphtheria toxoid and varidase-specific T cell clones from a single DR 6/7 donor by eight distinct monoclonal anti-HLA-DR antibodies was tested in proliferative assays. These moAb were selected because they had been previously defined for their ability: 1) to react with Ia molecules; 2) to recognize similar or different epitopes; 3) to share or not share idiotypic specificities. Our results show a distinct inhibition pattern for each clone tested. Furthermore, the various moAb could be classified into three groups according to their inhibitory effect on T cell proliferation. These data suggest: a) an epitopic restriction by class II antigens of antigen-specific human T cell clone proliferation; and b) the recognition of functional epitopes on the human Ia-like antigens by some but not all moAb studied.
mesh_terms: D000911:Antibodies, Monoclonal / Q000502:physiology*; D001667:Binding, Competitive; D002999:Clone Cells / Q000276:immunology; D004168:Diphtheria Toxoid / Q000276:immunology; D000939:Epitopes; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II / Q000276:immunology*; D006801:Humans; D008213:Lymphocyte Activation; D013299:Streptodornase and Streptokinase / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D004168:Diphtheria Toxoid; D000939:Epitopes; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II; D013299:Streptodornase and Streptokinase