Abstract
The pericardial effusion in a case of rheumatoid pericarditis was studied to determine whether immune complexes and mediators of cellular immunity, represented by migration inhibitory factor (MIF), were present. MIF-like activity was detected in the pericardial fluid, but only traces of immune complexes were revealed by ultracentrifugation. The MIF-like activity was partially characterized by column fractionation and sugar inhibition tests. The role of lymphokines in the pathogenesis of this case of rheumatoid pericarditis is strongly suggested.
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