Ischemic Stroke Clinical Trial
Official title:
Multicenter Open Label Randomized Comparative Study of Efficacy and Safety of Single Bolus Injection of Recombinant Nonimmunogenic Staphylokinase (Fortelyzin) and Bolus Infusion Alteplase (Actilyse) in Patients With Acute Ischemic Stroke
The aim of the study is to determine if single-bolus recombinant nonimmunogenic staphylokinase is effective and save thrombolytic agent in patients with ischemic stroke in comparison to alteplase.
Experimental Drug Profile. The active substance of Fortelyzin is Forteplase. It's recombinant protein which contains aminoacid sequence of staphylokinase. It is single chain molecula, consists of 138 aminoacids, weight 15.5 kDa. When staphylokinase is added to human plasma containing a fibrin clot, it preferentially reacts with plasmin at the clot surface, forming a plasmin-staphylokinase complex. This complex activates plasminogen trapped in the thrombus. The plasmin-staphylokinase complex and plasmin bound to fibrin are protected from inhibition by alpha2-antiplasmin. Once liberated from the clot (or generated in plasma), however, they are rapidly inhibited by alpha2-antiplasmin. This selectivity of action confines the process of plasminogen activation to the thrombus, preventing excessive plasmin generation, alpha2-antiplasmin depletion, and fibrinogen degradation in plasma. In rabbits anti forteplase antibodies are not produced. It was achieved by replacement of amino acids in immunogenic epitop of molecule staphylokinase. Blood fibrinogen decrease after i.v. injection of Fortelyzin less 10% within first 24 hours. Angiographic data suggests that restoration of coronary blood flow appears in up to 80% of patients with STEMI after i.v. injection of Fortelyzin. Main goals of the study are to prove an efficacy of the single-bolus intravenous injection of recombinant nonimmunogenic staphylokinase (Fortelyzin) in comparison with bolus infusion alteplase(Actilyse) in patients with ischemic stroke. To prove a safety and to assess possible adverse events in the single-bolus intravenous injection of recombinant nonimmunogenic staphylokinase (Fortelyzin) in comparison with bolus infusion alteplase (Actilyse) in patients with ischemic stroke. Study Design. All eligible patients will be randomized in two equal groups for administration recombinant nonimmunogenic staphylokinase (Fortelyzin) or alteplase (Actilyse) by using "envelope method" of randomization. It is an open-lable study. Each of agents will be administered no longer then 4,5 hours from symptoms onset. Comparative agent will be administered as prescribed in its instructions. All patients will be examination for 90 days ;
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