title: Synthetic antigens as immunogens: Part II: Antibodies to synthetic T antigen.
abstract: Antibody to the carbohydrate moiety of T antigen was developed. The synthetic antigen (Gal beta 1----3 GalNAc alpha 1----OC6H4N = N-BSA) was prepared by coupling the diazonium salt of the disaccharide derivative Gal beta 1----3 GalNAc alpha 1----OC6H4NH2 (o) with bovine serum albumin. Specificity of the antibody produced was examined with structurally related synthetic saccharides using the enzyme immunoassay technique. The presence of a glycosyl group at 0-6 of either the Gal or the GalNAc residue of the disaccharide Gal beta 1----3 GalNAc did not prevent binding of the antisera to the saccharide moiety. However, the antisera did not bind either the trisaccharide moiety NeuAc2----3 Gal beta 1----3 GalNAc alpha 1----OC6H4NO2 (o) or GlcNAc beta 1----3 Gal beta 1----3 GalNAc alpha OBn. These observations indicate that antibody approach to the antigen is to the 0-3 side of the terminal galactose in the disaccharide Gal beta 1----3 GalNAc. We have also observed that the antibody prefers Gal beta 1----3 GalNAc alpha 1----to Gal beta 1----3 GalNAc beta 1----disaccharide derivatives in its binding capacity. The antibody was found to bind natural T antigen present on neuraminidase-treated red blood cells and, by immunohistochemical analysis, it was found to bind to naturally occurring T antigen on breast tumor cells.
mesh_terms: D000906:Antibodies / Q000276:immunology*; D000917:Antibody Formation; D000918:Antibody Specificity; D000941:Antigens / Q000276:immunology*; D000957:Antigens, Viral, Tumor / Q000032:analysis / Q000276:immunology*; D001666:Binding Sites, Antibody; D001943:Breast Neoplasms / Q000032:analysis; D004912:Erythrocytes / Q000276:immunology; D006651:Histocytochemistry; D006801:Humans; D007120:Immunochemistry; D009844:Oligosaccharides / Q000138:chemical synthesis / Q000276:immunology; D014614:Vaccines, Synthetic / Q000008:administration & dosage / Q000276:immunology*
chemical_list: D000906:Antibodies; D000941:Antigens; D000957:Antigens, Viral, Tumor; D009844:Oligosaccharides; D014614:Vaccines, Synthetic