title: Serological cross-reactivity of murine A.TH anti-A.TL antibody (anti-l-Ek antibody) with La-like molecules of human antigen-presenting cells.
abstract: The purified protein derivative (PPD)-specific proliferative responses of T cells from human peripheral blood are shown to be dependent on antigen-presenting cells (APC) which bear HLA-DR antigen detected by the monoclonal anti-HLA-DR antibody. The serological cross-reactivity of murine A.TH anti-A.TL antibody was observed in human APC. By absorption experiments using H-2 congenic mice, the serological cross-reactivity of A.TH anti-A.TL antibody with human APC is mapped in the I-E subregion. Thus, anti-I-Ek antibody reacts with the Ia-like molecule(s) on human APC. Murine allo-anti-I-Ek antibody does not always react with determinants of Ia-like molecule(s) on human APC, since this antibody did not eliminate PPD-specific proliferative responses in one particular case. Thus, anti-I-Ek antibody seems to react some type of the polymorphic determinants but not of the shared determinants of human Ia-like molecule(s) on APC. The relationship between the cross-reactive molecule detected by murine allo-anti-I-Ek antibody and the HLA-DR antigen remains to be analyzed.
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology*; D003429:Cross Reactions; D000939:Epitopes; D005260:Female; D006681:HLA-D Antigens; D006684:HLA-DR Antigens; D006649:Histocompatibility Antigens / Q000276:immunology*; D000949:Histocompatibility Antigens Class II / Q000276:immunology*; D006801:Humans; D007518:Isoantibodies / Q000276:immunology*; D008213:Lymphocyte Activation; D008214:Lymphocytes / Q000276:immunology*; D008297:Male; D051379:Mice; D008805:Mice, Inbred A; D013601:T-Lymphocytes / Q000276:immunology; D014373:Tuberculin / Q000276:immunology
chemical_list: D000911:Antibodies, Monoclonal; D000939:Epitopes; D006681:HLA-D Antigens; D006684:HLA-DR Antigens; D006649:Histocompatibility Antigens; D000949:Histocompatibility Antigens Class II; C024138:I-E-antigen; D007518:Isoantibodies; D014373:Tuberculin