Abstract
The fibrinolytic and fibrinogenolytic properties of kidney cell pro-urokinase (PUK) were compared with those of natural urinary urokinase in human volunteers. Comparable degrees of fibrinolysis were obtained at a concentration of 500,000 U UK and a concentration of 500,000 IU natural urokinase. Natural urokinase showed a strong activation of the fibrinolytic system in plasma, evidenced by plasminogen activation, alpha 2-antiplasmin consumption, and the rise in fibrinogen-fibrin degradation products. In contrast to UK, there was no fall in plasminogen, no consumption of alpha 2-antiplasmin, and only a slight amount of fibrinogen-fibrin degradation products produced with PUK. These findings with PUK reveal a high affinity for fibrin and may result in better clot selectivity.
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