Y and blood group B type 2 glycolipid antigens accumulate in a human gastric carcinoma cell line as detected by monoclonal antibody. Isolation and characterization by mass spectrometry and NMR spectroscopy.
A monoclonal antibody (mAb), BR55-2, was generated from mice immunized with MCF-7 human breast carcinoma cells. This mAb specifically detected glycolipids with the Y determinant Fuc alpha 1----2Gal beta 1----4GlcNAc(3----1 alpha Fuc)-beta 1----3Gal beta 1----4Glc beta 1----1 Cer and the Y-related B-active difucosylated determinant Gal alpha 1----3Gal(2----1 alpha Fuc) beta 1----4GlcNAc(3----1 alpha Fuc) beta 1----3Gal beta 1----4Glc beta 1----1 Cer, but was not reactive with related monofucosylated glycolipids of type 2 chain (X-antigen, blood group H), type 1 chain (Lea antigen, blood group H and B) or with difucosylated type 2 and type 1 chain structures (A blood group antigen or blood group B and Leb, respectively). A series of glycolipids with Y and blood group B type 2 determinants were detected in human gastric adenocarcinoma cell line KATO III with mAb BR55-2 and with a previously characterized anti-blood group B mAb PA83-52 (Hansson, G. C., Karlsson, K.-A., Larson, G., McKibbin, J. M., Blaszczyk, M., Herlyn, M., Steplewski, Z., and Koprowski, H. (1983) J. Biol. Chem. 258, 4091-4097). The isolated antigens were structurally characterized by mass spectrometry of permethylated and permethylated-reduced derivatives and by proton NMR spectroscopy. In a chromatogram binding assay, mAb BR55-2 and mAb PA83-52 detected minor components with slower mobility than the Y-6 and blood group B-7-type 2 structures. The detection of a B type 2 determinant is the first chemical evidence for the presence of an autologous difucosyl blood group B type 2 antigen in human adenocarcinoma cells.
D000017:ABO Blood-Group System / Q000276:immunology*; D000230:Adenocarcinoma / Q000276:immunology*; D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology; D000918:Antibody Specificity; D000951:Antigens, Neoplasm / Q000276:immunology / Q000302:isolation & purification*; D002460:Cell Line; D055598:Chemical Phenomena; D002621:Chemistry; D000939:Epitopes / Q000276:immunology; D005643:Fucose; D006017:Glycolipids / Q000276:immunology*; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D051379:Mice; D013274:Stomach Neoplasms / Q000276:immunology*
D000017:ABO Blood-Group System; D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm; D000939:Epitopes; D006017:Glycolipids; D005643:Fucose