title: [Kinetics of the appearance of HLA-DR antigens on human alloactivated T lymphocytes and the demonstration of new antigenic determinants].
abstract: By studying serologically the appearance of HLA-DR determinants on T lymphocytes activated by a mixed lymphocyte culture, we have been able to demonstrate the existence of a new class of antigenic determinants distinct from classical HLA-DR antigens. Indeed, some monospecific anti-DR sera were cytotoxic from some alloactivated T cells, though not directed against their HLA-DR specificity. The absorption of these anti-sera on B lymphocytes bearing the HLA-DR antigen against which they were directed, did not remove their reactivity on alloactivated T lymphocytes. The absorption of the same anti-sera on activated T lymphocytes did not affect their anti-DR reactivity. This study shows the existence of new antigenic determinants expressed by T lymphocytes during their activation: alloactivated T lymphocyte antigens (AATL).
mesh_terms: D002478:Cells, Cultured; D003602:Cytotoxicity, Immunologic; D000939:Epitopes; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II / Q000276:immunology*; D006720:Homozygote; D006801:Humans; D007519:Isoantigens / Q000276:immunology*; D008213:Lymphocyte Activation; D013601:T-Lymphocytes / Q000276:immunology* / Q000528:radiation effects
chemical_list: D000939:Epitopes; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II; D007519:Isoantigens
vernacular_title: Cinétique de l'apparition des antigènes HLA-DR sur les Lymphocytes T humains activés par une réaction allogénique et mise en évidence de nouveaux déterminants antigéniques.