title: Surface antigens on normal and leukaemic human cells detected by monoclonal antibodies.
abstract: Surface antigens were analyzed on normal human marrow and chronic myeloid leukaemic cells using 4 monoclonal mouse anti-human antibodies. The fluorescence-activated cell sorter was used to quantify the binding of each antibody to different subpopulations of cells, and sorted fractions were cultured in agar-medium to assay for granulocyte-macrophage and eosinophil precursors. All cells in the granulocyte series including colony-forming cells bound a similar quantity of an antibody to the human leucocyte common antigen. This antibody did not bind to cells in the erythroid series. A monoclonal antibody to antigen present on brain, lymphocytes and granulocytes (and almost certainly homologous to the W3/13 antigen of the rat) bound to the cells in the order: blast greater than promyelocytes and myelocytes greater than granulocytes. The third monoclonal antibody was directed against a determinant of the leucocyte common antigen present predominantly on B lymphocytes and absent from the myeloid series. The fourth antibody, directed against the human homologue of Thy-1, reacted with less than 1% of marrow cells, none of which appeared to be granulocyte or eosinophil progenitors. The leucocoyte common antigen and the brain-lymphocyte-granulocyte-antigen were also present on colony- and cluster-forming cells from a patient with chronic myeloid leukemia. Using the low angle and wide angle light scatter properties of CML blood cells, 7-fold enrichment was obtained for progenitor cells from chronic myeloid leukaemia. With the monoclonal antibodies up to 4-fold enrichment was obtained.
mesh_terms: D000818:Animals; D000906:Antibodies / Q000276:immunology; D000915:Antibody Affinity; D000954:Antigens, Surface / Q000276:immunology*; D001853:Bone Marrow / Q000276:immunology*; D001854:Bone Marrow Cells; D002452:Cell Count; D002469:Cell Separation / Q000379:methods; D002478:Cells, Cultured; D003114:Colony-Forming Units Assay; D000939:Epitopes; D006412:Hematopoietic Stem Cells / Q000276:immunology; D006801:Humans; D007951:Leukemia, Myeloid / Q000276:immunology*; D007962:Leukocytes / Q000276:immunology; D051379:Mice
chemical_list: D000906:Antibodies; D000954:Antigens, Surface; D000939:Epitopes