Monoclonal antibodies to Brucella surface antigens associated with the smooth lipopolysaccharide complex - PubMed (original) (raw)
- PMID: 6203443
Monoclonal antibodies to Brucella surface antigens associated with the smooth lipopolysaccharide complex
G G Schurig et al. Am J Vet Res. 1984 May.
Abstract
Hybridomas producing antibodies to determinants associated with the lipopolysaccharide (LPS) of Brucella abortus and B melitensis were obtained by polyethylene glycol fusion of the SP2/0 myeloma cell line with B lymphocytes harvested from a Sprague-Dawley-derived rat previously immunized with whole B abortus strain 1119 organisms. Two clones, BRU38 and BRU28 , were selected for their ability to react with whole B abortus organisms and purified smooth-LPS ( f5p ). The BRU38 monoclonal antibodies were absorbed with live, rough strain 45/20 and smooth strains of B abortus and B melitensis organisms, whereas only smooth strains absorbed the antibody activity from BRU28 . Complete inhibition of the monoclonal's activity could be achieved with crude smooth-LPS, a purified f5p fraction, and a water-soluble acid degraded polysaccharide. Absorption of BRU38 and BRU28 with rough Brucella LPS, polysaccharide-B antigen, keto- deoxyoctanoic acid, or with several sugars and fatty acids known to be components of the Brucella LPS complex had no effect on the monoclonals. The data indicate that antigenic determinants are associated with the smooth LPS complex, probably with the O-side chain, and are expressed patchwise and in different quantities on several strains of B abortus and B melitensis. The B abortus rough strain 45/20 contains surface determinants which lead to the agglutination of smooth strain 1119 organisms. The potential use of monoclonals in competitive enzyme-linked immunosorbent assays for diagnostic purposes is discussed.
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