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- W2034366921 abstract "During the course of bovine brucellosis, Brucella abortus adheres to and infects cells of the mononuclear phagocyte system. Potential mechanisms of binding, as measured by numbers of phagocytosed bacteria, were studied in two populations of cattle genetically resistant (R) or susceptible (S) to infection with B. abortus. Live B. abortus gained entry into cultured bovine macrophages without organism-specific opsonization. Bacterial entry into macrophages from R was inhibited by the peptide RGDS, outer membrane-peptidoglycan complex from B. abortus strain RB51, anti-LFA-1 monoclonal antibody, anti-C3 antiserum, fibronectin, purified O-antigen from B. abortus lipopolysaccharide, mannan and heat-aggregated IgG. Bacterial entry into macrophages from S was inhibited by outer membrane-peptidoglycan complex, anti-LFA-1 monoclonal antibody, O-antigen and heat-aggregated IgG. The peptide RGES did not inhibit entry into macrophages from R or S. These data support the existence of organism-related receptors on monocyte-derived macrophages for B. abortus which mediate binding in the absence of serum. Secondly, there are demonstrable differences in mechanisms of binding of B. abortus to cells from cattle genetically resistant or susceptible to infection by this organism. These findings further substantiate the importance of phagocytosis and clearance functions of the mononuclear phagocyte system in resistance to bovine brucellosis. Perpetuation of infection in susceptible cattle may occur by establishing an intracellular reservoir of viable organisms. Further studies are necessary to investigate receptor affinities, and the potential for an alternate receptor for this organism in S cattle." @default.
- W2034366921 created "2016-06-24" @default.
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- W2034366921 date "1994-06-01" @default.
- W2034366921 modified "2023-10-10" @default.
- W2034366921 title "Mechanisms of binding of Brucella abortus to mononuclear phagocytes from cows naturally resistant or susceptible to brucellosis" @default.
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- W2034366921 doi "https://doi.org/10.1016/0165-2427(94)90103-1" @default.
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