title: Characteristics of the cell surface antigen, p72, associated with a variety of human tumours and mitogen-stimulated T-lymphoblasts.
abstract: The monoclonal antibody 791T /36, prepared against a human osteogenic sarcoma cell line, 791T , reacts with a variety of human tumours and also mitogen-stimulated PBMN cells. The target antigen as expressed upon 791T cells is a monomeric plasma membrane-associated glycoprotein with an apparent Mr of 72000. By quantitative flow cytofluorimetry, approx. 10(5) antibody molecules bound per cell to T-lymphoblasts induced with PHA or Con A, whereas only a few thousand antibody molecules bound per cell to unstimulated cells, so that the antigen may be classified as a lymphocyte activation antigen. On lymphoblasts, the 791T /36 again reacted with a protein with an apparent Mr of 72000. This antigen therefore has a dual role as a tumour marker and lymphocyte activation antigen which may be implicated in the regulation of cell proliferation.
mesh_terms: D000911:Antibodies, Monoclonal; D000936:Antigen-Antibody Complex; D000951:Antigens, Neoplasm / Q000032:analysis*; D000954:Antigens, Surface / Q000032:analysis*; D002460:Cell Line; D002478:Cells, Cultured; D003208:Concanavalin A; D005434:Flow Cytometry; D006801:Humans; D008213:Lymphocyte Activation; D009369:Neoplasms / Q000276:immunology*; D012516:Osteosarcoma / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D000936:Antigen-Antibody Complex; D000951:Antigens, Neoplasm; D000954:Antigens, Surface; D003208:Concanavalin A