title: SB-restricted presentation of influenza and herpes simplex virus antigens to human T-lymphocyte clones.
abstract: The HLA-D region of the human major histocompatibility complex (MHC) has been shown to be homologous to the murine I region in terms of both structure and function. Both regions encode class II MHC molecules which restrict T-lymphocyte interactions with antigen-presenting cells. We have recently described the MHC restriction and antigen specificities of human T-lymphocyte clones directed at strain A influenza virus. The majority of T-lymphocyte clones recognized antigen in the context of cell surface interaction products encoded by HLA-D/DR genes. However, a few clones recognized antigen presented by cells histoincompatible for D/DR antigens. We report here that some of these clones recognized viral antigens in association with antigens encoded by genes identical with or closely linked to the recently described secondary B-cell (SB) locus of the MHC. This is the first report that SB-restricted antigen recognition may form an integral part of normal, human immune responses.
mesh_terms: D000956:Antigens, Viral / Q000276:immunology*; D001402:B-Lymphocytes / Q000276:immunology; D002460:Cell Line; D000939:Epitopes; D006801:Humans; D009980:Influenza A virus / Q000276:immunology; D008213:Lymphocyte Activation; D008285:Major Histocompatibility Complex; D011948:Receptors, Antigen, T-Cell / Q000235:genetics; D018139:Simplexvirus / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000956:Antigens, Viral; D000939:Epitopes; D011948:Receptors, Antigen, T-Cell