Abstract
In an attempt to produce a superior model of rheumatoid arthritis, experiments have been performed to investigate the ease of induction of experimental arthritis in marmosets by immunological means. Marmosets were sensitised with the following combinations of antigen and adjuvant: ovalbumin in Freund's complete adjuvant (FCA), ovalbumin in FCA + Bordetella pertussis, methylated-BSA in FCA + B. pertussis or human fibrin in FCA + B. pertussis, and subsequently injected with the corresponding antigen in saline into one knee joint. Animals receiving ovalbumin, with or without B. pertussis, produced only a weak transient monoarticular synovitis. Animals receiving Met-BSA + B. pertussis produced a chronic synovitis but only mild erosive changes were apparent even 21 weeks after intraarticular injection. Animals receiving human fibrin produced a transient monoarticular synovitis of moderate intensity. These results indicate that the marmoset offers no obvious advantages over the rabbit for the induction of experimental rheumatoid arthritis.
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