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American Journal of Pathology, Vol 90, 7-22, Copyright © 1978 by American Society for Investigative Pathology

REGULAR ARTICLES

The effects of indomethacin on the generalized shwartzman reaction

EL Howes Jr, MT Kwok and DG McKay

The antiflammatory drug indomethacin, an inhibitor of prostaglandin synthesis, prevents the generalized Shwartzman reaction produced in rabbits by two intravenous injections of bacterial endotoxin. Indomethacin has this effect if given before the first but not the second injection of endotoxin. Measurements of circulating white blood cells, platelets, partial thromboplastin time, prothrombin time, fibrinogen, plasminogen, and soluble fibrin were made at several times after either the first or second injection of endotoxin treated and nontreated rabbits. Four hours after the first injection of endotoxin, leukopenia and thrombocytopenia were somewhat greater in treated rabbits and the prolongation of the activated partial thromboplastin time was shortened. Twenty-one hours after injection of endotoxin, leukocytosis and elevation of plasma fibrinogen were not as great in treated animals. Four hours following the second injection of endotoxin a decrease in fibrinogen, prolongation of the prothrombin time, and the elaboration of soluble fibrin were consistently found in rabbits with the generalized Shwartzman reaction. In treated rabbits, none of these changes occurred. Indomethacin prevents the generalized Shwartzman reaction by preventing the development of the prepared state in this endotoxin model.




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Copyright © 1978 by the American Society for Investigative Pathology.