Research Into the Effect of a Clot-dissolving Agent and Its Inhibitor

Summary

Single-chain urokinase-type plasminogen activator (pro-urokinase) is a highly effective thrombolytic drug. At pharmacologic concentrations however, pro-urokinase is converted to urokinase - a non specific thrombolytic, limiting its therapeutic use. Mutant pro-urokinase (M5) is more stable and its conversion to urokinase is inhibited by C1-inhibitor. The primary objectives of the study are: * To assess the overall safety and tolerability related to systemic plasminogen activation of single doses of M5 over a wide dose range (study part I). * To assess the effect of single doses of C1-inhibitor on the overall safety and tolerability of single doses of M5 and its effect on M5-induced coagulation changes (study part II).

Timeline

Start

2012-09

Primary completion

2012-10

Completion

2012-10

Publications

• Background Tomasi S, Sarmientos P, Giorda G, Gurewich V, Vercelli A. Mutant prourokinase with adjunctive C1-inhibitor is an effective and safer alternative to tPA in rat stroke. PLoS One. 2011;6(7):e21999. doi: 10.1371/journal.pone.0021999. Epub 2011 Jul 14.
• Background Pannell R, Kung W, Gurewich V. C1-inhibitor prevents non-specific plasminogen activation by a prourokinase mutant without impeding fibrin-specific fibrinolysis. J Thromb Haemost. 2007 May;5(5):1047-54. doi: 10.1111/j.1538-7836.2007.02453.x.
• Background Gurewich V, Pannell R, Simmons-Byrd A, Sarmientos P, Liu JN, Badylak SF. Thrombolysis vs. bleeding from hemostatic sites by a prourokinase mutant compared with tissue plasminogen activator. J Thromb Haemost. 2006 Jul;4(7):1559-65. doi: 10.1111/j.1538-7836.2006.01993.x.
• Background Liu JN, Liu JX, Liu Bf BF, Sun Z, Zuo JL, Zhang Px PX, Zhang J, Chen Yh YH, Gurewich V. Prourokinase mutant that induces highly effective clot lysis without interfering with hemostasis. Circ Res. 2002 Apr 19;90(7):757-63. doi: 10.1161/01.res.0000014825.71092.bd.

Drugs

Indications