title: Production of antibody to lipopolysaccharide (LPS) after immunization with a LPS-polymyxin B-agarose immunogen.
abstract: A method was devised to produce antibodies to lipopolysaccharide (LPS) in guinea-pigs following a single immunization. The antigen was prepared by mixing polymyxin B-agarose with LPS from Escherichia coli O55:B5. Use of the agarose support allowed purification of the complex by simple washing procedures. Twenty-nine days after a single injection of the immunogen mixed with Freund complete adjuvant all animals demonstrated antibody to the LPS portion of the complex. No antibodies were detected to the polymyxin B component. Typical titres of LPS as measured by ELISA were 2(11). After, a booster immunization, titres of LPS antibody were further increased and a greater avidity was noted. In contrast to other methods which have been employed for production of antibody to LPS, use of the polymyxin B-agarose complex has the following advantages: ease of antigen preparation, ready purification of the complex, potent immunostimulation, and under the conditions employed here, LPS-specific antibody production, without accompanying antibody to polymyxin B.
mesh_terms: D000818:Animals; D000907:Antibodies, Bacterial / Q000096:biosynthesis; D000918:Antibody Specificity; D004797:Enzyme-Linked Immunosorbent Assay; D004926:Escherichia coli / Q000276:immunology; D006168:Guinea Pigs; D007114:Immunization; D007074:Immunoglobulin G / Q000096:biosynthesis; D008070:Lipopolysaccharides / Q000276:immunology*; D008297:Male; D011112:Polymyxin B / Q000276:immunology; D012685:Sepharose / Q000276:immunology; D014612:Vaccines / Q000276:immunology*; D014614:Vaccines, Synthetic / Q000276:immunology*
chemical_list: D000907:Antibodies, Bacterial; D007074:Immunoglobulin G; D008070:Lipopolysaccharides; D014612:Vaccines; D014614:Vaccines, Synthetic; D012685:Sepharose; D011112:Polymyxin B