title: The monoclonal antibody directed to difucosylated type 2 chain (Fuc alpha 1 leads to 2Gal beta 1 leads to 4[Fuc alpha 1 leads to 3]GlcNAc; Y Determinant).
abstract: One of the monoclonal (AH-6) antibodies prepared by hybridoma technique against human gastric cancer cell line MKN74 was found to react with a series of glycolipids having the Y determinant (Fuc alpha 1 leads to 2Gal beta 1 leads to 4[Fuc alpha 1 leads to 3]GlcNAc). The structure of one such glycolipid isolated from human colonic cancer and from dog intestine was identified as lactodifucohexaosyl-ceramide (Fuc alpha 1 leads to 2Gal beta 1 leads to 4[Fuc alpha 1 leads to 3]GlcNAc beta 1 leads to 3Gal beta 1 leads to 4Glc beta 1 leads to 1-ceramide; IV3,III3Fuc2nLc4Cer). The hapten glycolipid did not react with monoclonal antibodies directed to Lea, Leb, and X-hapten structures, and the AH-6 antibody did not react with the X-hapten ceramide pentasaccharide (Gal beta 1 leads to 4[Fuc alpha 1 leads to 3]GlcNAc beta 1 leads to 3Gal beta 1 leads to 4Glc beta 1 leads to 1-ceramide), H1 glycolipid (Fuc alpha 1 leads to 2Gal beta 1 leads to 4GlcNAc beta 1 leads to 3Gal beta 1 leads to 4Glc beta 1 leads to 1-ceramide), nor with glycolipids having the Leb (Fuc alpha 1 leads to 2Gal beta 1 leads to 3[Fuc alpha 1 leads 4]GlcNAc beta 1 leads to R) determinant. The antibody reacted with blood group O erythrocytes, but not with A erythrocytes. Immunostaining of thin layer chromatography with the monoclonal antibody AH-6 indicated that a series of glycolipids with the Y determinant is present in tumors and in O erythrocytes.
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D002460:Cell Line; D002518:Ceramides / Q000032:analysis; D000939:Epitopes / Q000032:analysis*; D005643:Fucose / Q000032:analysis*; D006017:Glycolipids / Q000032:analysis; D006801:Humans; D006825:Hybridomas / Q000276:immunology; D009682:Magnetic Resonance Spectroscopy; D051379:Mice; D009844:Oligosaccharides / Q000032:analysis; D011863:Radioimmunoassay; D013274:Stomach Neoplasms / Q000032:analysis
chemical_list: D000911:Antibodies, Monoclonal; D002518:Ceramides; D000939:Epitopes; D006017:Glycolipids; D009844:Oligosaccharides; D005643:Fucose