title: Cellular distribution of a human I-A-like (DS/DC) antigen on normal and neoplastic lymphoid cells.
abstract: Previous biochemical studies have shown that B cell specific, monoclonal antibody, McAb 33.1, reacts with a class II antigen that represents a human analogue of murine I-A (DS/DC) antigens (J. Exp. Med. 158:1924, 1983). McAb 33.1 recognizes a polymorphic human B lymphocyte specific antigen present on mu+, B1+ peripheral B cells, B lymphoid cell lines, activated B cells, and neoplastic B lymphoid cells. Of 100 HLA-D/DR typed EBV-transformed lymphoblastoid cell lines tested, only those from DR3,3 and DR7,7 individuals failed to react with McAb 33.1. The 33.1 antigen is present at lower concentrations on B cells from blood, tonsil, spleen, and lymph node when compared to B cell lines. By contrast, the antigen is not detectable on blood T lymphocytes, T cell lines, or mitogen activated T cells and it is absent on monocytes of some individuals or is present only on a minor subpopulation (approximately 20%). McAb 33.1 should facilitate the functional, structure, and molecular dissection of the human Ia system.
mesh_terms: D000818:Animals; D000954:Antigens, Surface / Q000276:immunology; D001402:B-Lymphocytes / Q000276:immunology*; D002051:Burkitt Lymphoma / Q000276:immunology*; D002460:Cell Line; D005434:Flow Cytometry; D000949:Histocompatibility Antigens Class II / Q000276:immunology*; D006801:Humans; D007938:Leukemia / Q000276:immunology; D051379:Mice; D009000:Monocytes / Q000276:immunology; D014411:Neoplastic Stem Cells / Q000276:immunology*; D013154:Spleen / Q000166:cytology; D013234:Stem Cells / Q000276:immunology*
chemical_list: D000954:Antigens, Surface; D000949:Histocompatibility Antigens Class II