title: Specificity and function of monoclonal antibodies directed against Ewing sarcoma cells.
abstract: A selection of 16 monoclonal antibodies has been produced against a fresh Ewing's sarcoma (ES) tumor mixed with a permanent ES cell line. The majority of antibodies identify an 80-kDa molecule, which is not detected on healthy tissues except on certain cultured monocytes. One antibody recognizes the CD2 ligand MIC2 and 2 antibodies (numbers 13 and 16) define a higher-molecular-mass antigen. Antibody 16 is also expressed on mesenchymal fibroblasts of bone marrow or fetal origin. Tumor-specific antigen expression is potentially linked to the chromosome 22 abnormality described in Ewing's sarcoma, products altered expression in tumors with the chromosome 11/22 translocation has not been shown. The putative chimeric protein on chromosome 11 is apparently not expressed to a great extent, as tested by Northern blotting; however, the fusion protein initiated on chromosome 22 and ending on chromosome 11 is readily seen on Northern blots. The altered expression of a number of cellular genes in addition to a novel gene product(s) originating from translocation events were expected to be identified by monoclonal antibodies selected by their unique binding pattern to Ewing's sarcoma (ES) cells.
authors.affiliation: Immunology Laboratory, Institute of Blood Coagulation and Transfusion Medicine, University of Düsseldorf, Germany.
authors.forename: L R
authors.initials: LR
authors.lastname: Shi
authors.forename: D
authors.initials: D
authors.lastname: Eichelbauer
authors.forename: F
authors.initials: F
authors.lastname: Borchard
authors.forename: H
authors.initials: H
authors.lastname: Jürgens
authors.forename: U
authors.initials: U
authors.lastname: Göbel
authors.forename: E M
authors.initials: EM
authors.lastname: Schneider
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology*; D000912:Antibodies, Neoplasm / Q000276:immunology*; D000918:Antibody Specificity; D000951:Antigens, Neoplasm / Q000276:immunology; D000954:Antigens, Surface / Q000276:immunology; D005434:Flow Cytometry; D007132:Immunoglobulin Isotypes / Q000276:immunology; D007150:Immunohistochemistry; D051379:Mice; D008807:Mice, Inbred BALB C; D012512:Sarcoma, Ewing / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D000912:Antibodies, Neoplasm; D000951:Antigens, Neoplasm; D000954:Antigens, Surface; D007132:Immunoglobulin Isotypes