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  • Title: The effects of intravenous ZK36-374, a stable prostacyclin analogue, on normal volunteers.
    Author: Belch JJ, Greer I, McLaren M, Saniabadi AR, Miller S, Sturrock RD, Forbes CD.
    Journal: Prostaglandins; 1984 Jul; 28(1):67-77. PubMed ID: 6207561.
    Abstract:
    Prostacyclin (PGI2) therapy has been evaluated in many vascular diseases. However, it is unstable and a potent vasodilator, able to lower blood pressure. Although such effects may be desirable in some situations, they are unwanted in others. ZK36-374 (Schering AG) is a carbacyclin derivative with a similar action to PGI2; however, it is chemically stable and has less of a hypotensive action. We evaluated the effects of a 4-hour I.V. infusion of ZK36-374 at a maximum dose of 2ng/Kg/min. in ten normal volunteers. Prior to the infusion and at 2 and 4 hours, blood was sampled for estimation of platelet aggregation in both platelet rich plasma and whole blood. Beta-thromboglobulin, 6-keto-PGF1 alpha and TXB2 were measured by radioimmunoassay, as were other coagulation and rheological tests. The infusion was well tolerated with facial flushing, jaw trismus and some nausea at max dose. Blood pressure and pulse rate were not significantly altered. During infusion of ZK36-374, the rates of platelet aggregation to 2 microns ADP and 2 micrograms collagen in PRP were significantly decreased when compared to baseline, as was whole blood aggregation to 2 microns ADP and 0.5 microgram collagen. Beta TG also fell significantly, as did the levels of 6-keto-PGF1 alpha and TXB2. Fibrinolysis, blood viscosity, and red cell deformability were unchanged. ZK36-374 is an effective anti-platelet agent without major toxic or hypotensive effects.
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