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Research Article Free access | 10.1172/JCI108447

Antibody-dependent cell-mediated cytotoxicity in selected autoimmune diseases.

J L Feldmann, M J Becker, H Moutsopoulos, K Fye, M Blackman, W V Epstein, and N Talal

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Published July 1, 1976 - More info

Published in Volume 58, Issue 1 on July 1, 1976
J Clin Invest. 1976;58(1):173–179. https://doi.org/10.1172/JCI108447.
© 1976 The American Society for Clinical Investigation
Published July 1, 1976 - Version history
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Abstract

Antibody-dependent cell-mediated cytotoxicity mediated by peripheral blood lymphocytes was studied in patients with systemic lupus erythematosus, polyarteritis nodosa. Sjogren's syndrome, and rheumatoid arthritis. The target cells were chicken erythrocytes coated with rabbit anti-chicken erythrocyte antibody. Antibody-dependent cell-mediated cytotoxic activity was normal in Sjogren's syndrome and rheumatoid arthritis but significantly decreased (P is less than 0.001) in active systemic lupus erythematosus and in two patients with polyarteritis nodosa. A partial regeneration of antibody-dependent cell-mediated cytotoxic activity was obtained by treatment with pronase and DNase followed by overnight incubation. Sera from patients with systemic lupus erythematosus inhibited antibody-dependent cell-mediated cytotoxic activity of normal lymphocytes. The inhibitory activity was studied by specific immunoadsorption and sucrose density geadient ultracentrifugation. Removal of IgG but not IgM greatly reduced inhibition. Inhibitory factors were present in 7S and heavier fractions containing IgG. Five systemic lupus erythematosus patients were studied serially to determine if improvement in clinical status could be correlated with a decrease in serum inhibitory factors as studied by inhibition of normal antibody-dependent cell-mediated cytotoxicity. Indeed, a greater serum inhibitory capacity was found in each patient during periods of greater disease activity.

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