title: Cross-reactivity of monoclonal antibodies against lipopolysaccharides of gram-negative bacteria.
abstract: Monoclonal antibodies were produced against Escherichia coli O111, Escherichia coli J5, and the rough (R) mutant of Salmonella typhimurium M206, and tested by enzyme-linked immunosorbent assay against lipopolysaccharides of several gram-negative strains. The monoclonal antibodies were also identified with an immunoblotting assay. Anti-Escherichia coli O111 monoclonal antibodies reacted only with homologous O antigens. Anti-J5 monoclonal antibodies cross-reacted with core lipopolysaccharide, especially with Rc lipopolysaccharide. IgM anti-J5 monoclonal antibodies showed more extensive cross-reactivity than IgG3 monoclonal antibodies. Anti-Re monoclonal antibodies cross-reacted weakly with all rough lipopolysaccharide tested. Thus, the varying specificity of these monoclonal antibodies seems to indicate that the core regions in the lipopolysaccharides of various gram-negative bacteria are not similar.
mesh_terms: D000818:Animals; D000907:Antibodies, Bacterial / Q000032:analysis / Q000276:immunology*; D000911:Antibodies, Monoclonal / Q000032:analysis / Q000276:immunology*; D000918:Antibody Specificity; D000942:Antigens, Bacterial / Q000276:immunology; D003429:Cross Reactions; D004591:Electrophoresis, Polyacrylamide Gel; D004797:Enzyme-Linked Immunosorbent Assay; D004926:Escherichia coli / Q000235:genetics / Q000276:immunology*; D007163:Immunosorbent Techniques; D008070:Lipopolysaccharides / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D009154:Mutation; D019081:O Antigens; D011817:Rabbits; D012486:Salmonella typhimurium / Q000235:genetics / Q000276:immunology*
chemical_list: D000907:Antibodies, Bacterial; D000911:Antibodies, Monoclonal; D000942:Antigens, Bacterial; D008070:Lipopolysaccharides; D019081:O Antigens