Resistance of porcine blood clots to lysis relates to poor activation of porcine plasminogen by tissue plasminogen activator.
Blood Coagul Fibrinolysis
; 17(5): 417-20, 2006 Jul.
Article
em En
| MEDLINE
| ID: mdl-16788320
ABSTRACT
In-vitro experimentation was performed on porcine and human blood to determine their comparative responsiveness to a novel fibrinolytic inhibitor and thereby assess whether the pig is a suitable animal model for subsequent in-vivo testing of this inhibitor. Thromboelastography showed the clots formed from porcine whole blood to be highly resistant to tissue plasminogen activator (t-PA)-catalyzed lysis, and this communication offers the resistance of porcine plasminogen to activation by t-PA as an explanation. Porcine blood containing 100 and 1500 IU/ml added t-PA lysed very slowly, having LY30 values of 1.9 +/- 1.4 and 2.9 +/- 1.9%, respectively. In contrast, the LY30 values for the human clots containing 100 and 1500 IU/ml t-PA were 77.1 +/- 6.3 and 93.3 +/- 1.3%, respectively. Moreover, purified porcine plasminogen was activated very slowly by added t-PA in the presence of both human and porcine fibrin. Activation of plasminogen by the endogenous activators, as measured by the euglobulin clot lysis time, was greatly prolonged for the pig (22 +/- 3 h) compared with the human (3.5 +/- 1.5 h). These results suggest caution in using the pig as an experimental model when studying the effects of various agents on fibrinolysis.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Trombose
/
Ativador de Plasminogênio Tecidual
/
Fibrinólise
/
Fibrinolíticos
Limite:
Animals
/
Humans
Idioma:
En
Revista:
Blood Coagul Fibrinolysis
Assunto da revista:
ANGIOLOGIA
/
HEMATOLOGIA
Ano de publicação:
2006
Tipo de documento:
Article
País de afiliação:
Austrália