Myeloid progenitor surface antigen identified by monoclonal antibody.
A mouse monoclonal antibody, WM-15, has been developed which reacts with a human myeloid lineage-restricted cell surface antigen. WM-15, an IgG1 antibody, reacts with a mean of 3.8% of normal bone marrow mononuclear cells, identifying predominantly promyelocytes and myeloblasts, and in fluorescence-activated cell sorting experiments produces enrichment of bone marrow granulocyte-macrophage progenitor cells. Normal mature monocytes and granulocytes are weakly labelled by WM-15, but other haemopoietic cells including erythroblasts and all lymphoid cells are unreactive. The myeloid specificity of this antibody is highlighted by its reactivity with myeloid leukaemia cell lines and 65% of cases of acute myeloid leukaemia, while lymphoid cell lines and leukaemias are WM-15 negative. WM-15 appears to be a useful reagent for further investigation of normal and abnormal myelopoiesis.
D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology*; D000918:Antibody Specificity; D000951:Antigens, Neoplasm / Q000032:analysis; D000954:Antigens, Surface / Q000032:analysis*; D001773:Blood Cells / Q000276:immunology; D001853:Bone Marrow / Q000276:immunology*; D002460:Cell Line; D006412:Hematopoietic Stem Cells / Q000276:immunology*; D006801:Humans; D007938:Leukemia / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C
D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm; D000954:Antigens, Surface