title: A monoclonal antibody that detects a polymorphic determinant common to HLA-DR1 and 2.
abstract: In an attempt to study the gene products of the HLA complex, a monoclonal antibody, named HU-30, was produced by immunizing BALB/c mice with a cultured human B lymphoblastoid cell line, Shi-C3 (Aw24, Aw31, Bw51, Bw52, DR2, DR blank, MT1, MT2, MB3). HU-30 belonged to the IgG2 subclass and was active in complement dependent cytotoxicity. When the serological specificity was evaluated with a panel of 15 cultured human lymphoblastoid cell lines, it was found that HU-30 detected a polymorphic determinant, common to HLA-DR1 and 2, with much stronger cytotoxic activity against HLA-DR2 positive B cell lines. When HU-30 was tested against a panel of B cells from 84 healthy donors at a dilution of 2(-13), it gave positive reactions only with cells typed as HLA-DR2. Furthermore, sequential coprecipitation studies indicated that the HU-30 determinant was borne on the molecules carrying the HLA-DR determinants. Thus, HU-30 appears to be of great value as a tissue typing reagent monospecific for HLA-DR2.
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000096:biosynthesis / Q000276:immunology*; D001402:B-Lymphocytes / Q000276:immunology; D001666:Binding Sites, Antibody; D002460:Cell Line; D000939:Epitopes / Q000235:genetics*; D005260:Female; D005802:Genes, MHC Class II; D006684:HLA-DR Antigens; D015798:HLA-DR1 Antigen; D000949:Histocompatibility Antigens Class II / Q000276:immunology; D006801:Humans; D051379:Mice; D008807:Mice, Inbred BALB C; D011110:Polymorphism, Genetic
chemical_list: D000911:Antibodies, Monoclonal; D000939:Epitopes; D006684:HLA-DR Antigens; D015798:HLA-DR1 Antigen; D000949:Histocompatibility Antigens Class II