Clearance of coagulation factor VIII in very low-density lipoprotein receptor knockout mice

Low-density lipoprotein receptor-related protein (LRP) contributes to factor VIII (FVIII) catabolism in vivo. Besides LRP, FVIII also interacts with very low-density lipoprotein receptor (VLDLR) in vitro. We investigated the physiological role of VLDLR in FVIII catabolism, using knockout mouse models for VLDLR and LRP, alone and in combination....

Factor V antigen levels and venous thrombosis: Risk profile, interaction with factor V leiden, and relation with factor VII antigen levels

Clotting factor V has a dual function in coagulation: after activation, procoagulant factor V stimulates the formation of thrombin, whereas anticoagulant factor V acts as a cofactor for activated protein C (APC) in the degradation of factor VIII/VIIIa, thereby reducing thrombin formation. In the present study, we evaluated whether plasma factor...

Hereditary cerebral hemorrhage with amyloidosis - Dutch type: A study of fibrinolysis

In view of reported associations between increased bleeding tendency and systemically decreased alpha 2-antiplasmin in patients with systemic amyloid deposition we studied alpha 2-antiplasmin, fibrinogen, C-reactive protein and blood levels of locally produced endothelial hemostasis factors in the acute and quiescent phase in 16 patients with...

Fibrinolytic shut-down after surgery: Impairment of the balance between tissue-type plasminogen activator and its specific inhibitor

In nine patients with non-malignant diseases undergoing major upper abdominal surgery, the mechanism of the postoperative fibrinolytic shut-down was investigated because of its potential significance for postoperative deep vein thrombosis by employing new and specific methods for assessing and stimulating the fibrinolytic system. The shut-down...

Activated protein C decreases plasminogen activator-inhibitor activity in endothelial cell-conditioned medium

Confluent cultures of endothelial cells from human umbilical cord were used to study the effect of activated human protein C (APC) on the production of plasminogen activators, plasminogen activator-inhibitor, and factor VIII-related antigen. Addition of APC to the cells in a serum-free medium did not affect the production of tissue-type...

Response of fibrinolytic activity and factor VIII-related antigen to stimulation with desmopressin in hyperlipoproteinemia

Impairment of fibrinolysis is supposed to contribute to CVD. In 38 hyperlipoproteinemic patients, known to be at risk for early CVD, fibrinolytic activity was measured before and after stimulation with DDAVP. A negative correlation was found between serum triglyceride levels and fibrinolytic activity, both before and after DDAVP. A subnormal...

The use of a carbodiimide-containing fixative for the immunohistochemical demonstration of coagulation factor VIII in rat vascular tissue

Immunohistochemically, coagulation F-VIII-R:AG in vascular endothelial cells can be demonstrated with antihuman F-VIII-R:AG antisera after fixation with 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide, using both peroxidase and fluorescence techniques. The generally used aldehyde containing fixatives, result in a loss of immunoreactivity....