Mechanism of action of factor VIIa in the treatment of coagulopathies.

Ulla Hedner

Research output: Contribution to journalArticlepeer-review

58 Citations (SciVal)

Abstract

Recombinant factor VIIa (rFVIIa) has been developed for treatment of bleeding in patients with hemophilia who have inhibitors against factor VIII (FVIII) or FIX, and has been found to induce hemostasis during major orthopedic surgery. The use of rFVIIa treatment for hemophilia is a new concept and is based on the low-affinity binding of FVIIa to the surface of thrombin-activated platelets. Administration of pharmacologic doses of exogenous rFVIIa enhances thrombin generation on the platelet surface at the site of injury independently of the presence of FVIII or FIX. Pharmacologic doses of rFVIIa induce hemostasis not only in hemophilia patients, but also in patients with thrombocytopenia, functional platelet defects, and with profuse bleeding triggered by extensive surgery or trauma. The general mechanism of action of rFVIIa to induce hemostasis under these conditions may be its capacity to generate a tight fibrin hemostatic plug through increased thrombin generation. A tight fibrin plug will aid in resisting the overwhelming local release of fibrinolytic activity triggered by vast tissue damage occurring in extensive trauma. Local fibrinolytic activity also occurs in the gastrointestinal tract as well as during profuse postpartum bleeding. Pharmacologic doses of rFVIIa induce hemostasis in these cases also.
Original languageEnglish
Pages (from-to)77-85
JournalSeminars in Thrombosis and Hemostasis
Volume32 Suppl 1
Issue numberSuppl. 1
DOIs
Publication statusPublished - 2006

Bibliographical note

The information about affiliations in this record was updated in December 2015.
The record was previously connected to the following departments: Emergency medicine/Medicine/Surgery (013240200)

Subject classification (UKÄ)

  • Clinical Medicine

Keywords

  • thrombin
  • posttraumatic bleeding
  • generation
  • bleeding disorders
  • recombinant factor VIIa
  • hemophilia

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