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The in vivo ability of the specific PAF-antagonist WEB 2086, a thienotriazolodiazepine, to inhibit platelet-activating factor (PAF) in cattle was investigated by in vitro determination of platelet aggregation curves. WEB 2086 was infused intravenously into a group of 5 healthy male Friesian calves in a dose of 3 mg/kg over 1 min. The resultant inhibition(More)
The ultrastructure of bovine platelets was examined by transmission electron microscopy without any pretreatment (control), and after WEB 2086 (a triazolodiazepine) or ketoprofen (NSAID) pretreatment, followed by PAF infusion. The blood platelet count was also investigated. The group of calves that received WEB 2086 pretreatment before platelet-activating(More)
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