title: Expression of HLA-DR and common acute lymphoblastic leukemia antigens on glioma cells.
abstract: The expression on several established human glioma cell lines of two well-defined differentiation antigens, HLA-DR and the common acute lymphoblastic leukemia antigen (CALLA) has been demonstrated. Rabbit anti-CALLA antiserum and monoclonal anti-Ia antibodies specifically lysed glioma cells in the presence of complement. Absorption of anti-CALLA antiserum and anti-Ia antibodies by glioma cells abolished their cytotoxicity against blasts isolated from a common acute lymphoblastic leukemia. Immunoprecipitation of solubilized glioma cells by monoclonal anti-Ia antibodies revealed two polypeptide chains of 28 and 33 kDa, whereas the anti-CALLA antiserum precipitated a single polypeptide chain of 100 kDa.
mesh_terms: D000042:Absorption; D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology; D000912:Antibodies, Neoplasm / Q000276:immunology*; D000951:Antigens, Neoplasm / Q000276:immunology*; D001345:Autoradiography; D005910:Glioma / Q000276:immunology*; D000949:Histocompatibility Antigens Class II / Q000276:immunology*; D006801:Humans; D007106:Immune Sera / Q000494:pharmacology; D007945:Leukemia, Lymphoid / Q000276:immunology*; D011817:Rabbits
chemical_list: D000911:Antibodies, Monoclonal; D000912:Antibodies, Neoplasm; D000951:Antigens, Neoplasm; D000949:Histocompatibility Antigens Class II; D007106:Immune Sera