Effect of soluble and immobilized plasmin on fibrinogen and platelets
Senatore, F.; Shankar, H.; Ho, C.H.; Avantsa, S.; Allon, M.; Posteraro, R.
Thrombosis and Haemostasis 64(3): 445-449
1990
ISSN/ISBN: 0340-6245 PMID: 2151408 Document Number: 351034
Plasmin was immobilized on collageno-elastic tubes (CET) using carbodiimide as the cross-linking agent. The effects of plasmin-CET grafts and corresponding soluble plasmin on fibrinogen, thrombin-mediated fibrinogen activation, and platelet activity, were investigated. There was a significant increase in fibrinogen deposition on plasmin-CETs over non-plasmin (i.e. control) CETs. Furthermore, exposure of fibrinogen to plasmin CETs enhances its deposition to control grafts situated downstream. Plasmin-bound CETs retained higher platelet deposition when preliminarily coated with fibrinogen. Finally, plasmin exerted a positive effect on thrombin-mediated fibrinogen activation at low plasmin concentrations. A mechanistic hypothesis aimed at interpreting this finding is proposed.