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Specific fibrinolytic properties of different molecular forms of pro-urokinase from a monkey kidney cell culture

Specific fibrinolytic properties of different molecular forms of pro-urokinase from a monkey kidney cell culture

Samenvatting

The specific fibrinolytic properties of both high molecular weight (55 kd) and low molecular weight (30 kd) pro-urokinase from a monkey kidney cell culture were evaluated in a plasma clot lysis system and compared with those of human urokinase. The system was composed of a radiolabelled plasma clot immersed in plasma containing the fibrinolytic agent. On unit base, 55 kd pro-urokinase was approximately 1.5 times more effective in lysing the clot than 30 kd pro-urokinase and equally effective as urokinase. In contrast to urokinase, both pro-urokinase forms induced clot lysis without degrading fibrinogen in the surrounding plasma. However, a considerable activation of the fibrinolytic system in the plasma occurred as a large amount of alpha 2-antiplasmin was consumed, indicating that pro-urokinase was not fully fibrin-specific. Quenching antibodies against tissue-type plasminogen activator (t-PA) added to the plasma clot lysis system retarded but did not prevent pro-urokinase-induced clot lysis. This indicated that not only was t-PA in plasma involved in the activation of pro-urokinase (probably via plasmin), but that an additional mechanism also existed.

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OrganisatieHanzehogeschool Groningen
LectoraatBiobased Ingredients and Materials
Gepubliceerd inThrombosis and haemostasis Schattauer, Vol. 42, Uitgave: 6, Pagina's: 761-768
Datum1986-06-15
TypeArtikel
ISSN0049-3848
DOI10.1016/0049-3848(86)90112-x
TaalEngels

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