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Serum opsonin, bacteria, and polymorphonuclear leukocyte interactions in subacute bacterial endocarditis: Anti-γ-globulin factors and their interaction with specific opsonins
Ronald P. Messner, Throstur Laxdal, Paul G. Quie, Ralph C. Williams Jr.
Ronald P. Messner, Throstur Laxdal, Paul G. Quie, Ralph C. Williams Jr.
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Serum opsonin, bacteria, and polymorphonuclear leukocyte interactions in subacute bacterial endocarditis: Anti-γ-globulin factors and their interaction with specific opsonins

Abstract

The effect of anti-γ-globulin factors on 7S γ-globulin opsonins from patients with subacute bacterial endocarditis has been examined with a quantitative in vitro phagocytosis system. Human anti-γ-globulin factors from patients with subacute bacterial endocarditis and rheumatoid arthritis inhibited the opsonic action of 7S γ-globulin specifically bound to bacteria. A similar antiopsonic effect was obtained with rabbit antiserum to human γG globulin. The antiopsonic effect of anti-γ-globulin factors did not correlate with their ability to potentiate agglutination of bacteria by 7S antibody. Competition was demonstrated between the antiopsonic effect of anti-γ-globulin factors and the phagocytosis-promoting action of heat-labile serum factors containing hemolytically active complement.

Authors

Ronald P. Messner, Throstur Laxdal, Paul G. Quie, Ralph C. Williams Jr.

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