Effect of Soluble and Immobilized Plasmin on Fibrinogen and Platelets

Summary

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.

• References

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