title: Leu-10 (HLA-DC/DS) antigen distribution in human leukaemic disorders as detected by a monoclonal antibody: correlation with HLA-DR expression.
abstract: Reactivity of the monoclonal antibody anti-Leu-10 that detects the human equivalent of the murine 1-A subregion antigen(s) was studied and correlated with anti-HLA-DR expression on 83 cases of acute and chronic leukaemias, leukaemic non-Hodgkin's lymphomas (NHL) and seven human cell lines. Peripheral blood and/or bone marrow leukaemic cell suspensions were stained by indirect immunofluorescence for both monoclonal antibodies and analysed by flow cytometry. Leu-10, like HLA-DR, was absent from T-cell acute lymphoblastic leukaemia (ALL) (two cases). It was expressed on: 33% of TdT +, CALLA + ALL cases (8/24); 27% (4/15) of acute non-lymphocytic leukaemia (ANLL); 85% (24/28) of HLA-DR + B-cell chronic lymphocytic leukaemia (CLL); and on 9/14 (64%) B-cell NHL cases. There were no differences in clinical characteristics between Leu-10 + and Leu-10--patient subgroups. We were able to induce Leu-10 expression on 'Josh' cell line by culturing it with 12-0-tetra-decanoylphorbol-13-acetate (TPA). Our data indicate that Leu-10 expression on leukaemic cells is more restricted than HLA-DR and is likely to be differentiation related, since it can be induced to be expressed at a later stage than HLA-DR.
mesh_terms: D000328:Adult; D000911:Antibodies, Monoclonal / Q000276:immunology; D002460:Cell Line; D002675:Child, Preschool; D005260:Female; D005455:Fluorescent Antibody Technique; D006683:HLA-DQ Antigens; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II / Q000032:analysis*; D006801:Humans; D007938:Leukemia / Q000276:immunology*; D007945:Leukemia, Lymphoid / Q000276:immunology; D008223:Lymphoma / Q000276:immunology; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology
chemical_list: D000911:Antibodies, Monoclonal; D006683:HLA-DQ Antigens; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II; D013755:Tetradecanoylphorbol Acetate