title: HLA-D/DR restriction of Langerhans cell-dependent antigen activation of T lymphocytes. The same D/DR determinants are restriction elements on monocytes and Langerhans cells.
abstract: In previous studies we have shown that the response of T cells to antigen presented by epidermal Langerhans cells (LC) is restricted by products of the HLA-D region. An optimal antigen-specific response required that the LC used for antigen presentation shared both, or at least one, of the D/DR determinants of the T-cell donor. These studies were, however, disturbed by a strong allogeneic response induced by the foreign D/DR determinants of the LC. We report here that by separating the antigen-specific T cells from those that are alloreactive, a clearer picture of the D/DR restriction phenomenon may be obtained. Furthermore, the present studies demonstrate that the same D/DR determinants function as restriction elements on peripheral blood monocytes and LC.
mesh_terms: D000941:Antigens / Q000276:immunology; D000939:Epitopes / Q000235:genetics; D005802:Genes, MHC Class II; D006684:HLA-DR Antigens; D006801:Humans; D007801:Langerhans Cells / Q000276:immunology*; D008213:Lymphocyte Activation; D008214:Lymphocytes / Q000276:immunology / Q000528:radiation effects; D009000:Monocytes / Q000276:immunology; D018139:Simplexvirus / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*; D014373:Tuberculin / Q000276:immunology
chemical_list: D000941:Antigens; D000939:Epitopes; D006684:HLA-DR Antigens; D014373:Tuberculin