The clotting cascade plays an essential role in hemostasis but also contributes to many pathological processes, such as thrombosis. The cascade can be divided into 2 major phases: initiation and amplification (Figure). The initiation phase is triggered by the tissue factor/factor VIIa complex (known as the extrinsic pathway) and generates small amounts of thrombin that activates cofactors (FVII...

Endothelial and tumor cells synthesize tissue factor pathway inhibitor (TFPI-1), which regulates tissue factor (TF) function by TF. VIIa. Xa. TFPI-1 quaternary complex formation (where VIIa and Xa are coagulation factors) and by translocation of these complexes into glycosphingolipid-rich microdomains of the cell membrane. Recombinant TFPI-1 added exogenously to cells is targeted to a degradati...

The treatment of bleeding for haemophilic patients with inhibitors relies on the use of the bypassing agents, recombinant factor VIIa and factor eight inhibitor bypass activity (FEIBA). While both therapies are effective in the majority of bleeding episodes, there is a significant amount of interindividual variability when it comes to the response to therapy. As of yet, there is no reliable lab...

EVIDENCE DEFINITIONS • Class I: Prospective randomized controlled trial. • Class II: Prospective clinical study or retrospective analysis of reliable data. Includes observational, cohort, prevalence, or case control studies. • Class III: Retrospective study. Includes database or registry reviews, large series of case reports, expert opinion. • Technology assessment: A technology study which doe...

This study was designed to evaluate the antithrombotic efficacy and bleeding propensity of a selective, small-molecule inhibitor of tissue factor/factor VIIa (TF/VIIa) in comparison to small-molecule, selective inhibitors of factor Xa and thrombin in a nonhuman primate model of thrombosis. Acute, spontaneous thrombus formation was induced by electrolytic injury to the intimal surface of a femor...

Many cancer patients reportedly are in a hypercoaguable state, with recurrent thrombosis due to the impact of cancer cells and chemotherapy or radiotherapy on the coagulation cascade. Studies have demonstrated that unfractionated heparin (UFH) or low-molecular-weight heparin (LMWH) interfere with various processes involved in tumor growth and metastasis. These include fibrin formation, binding ...