Factor VII levels have been measured in 100 patients with liver disease following parenteral vitamin K1 therapy. There was good agreement between specific factor VII measurements and the one-stage prothrombin time apart from six patients with compensated cirrhosis in whom the prothrombin time was prolonged despite the presence of normal factor VII levels. A mean activity of 58% was found in pat...

BACKGROUND/AIMS Low factor V and VII levels are bad prognostic indicators in fulminant hepatic failure (FHF). The prognostic importance of admission versus follow up levels of these factors in patients with acute hepatitis and coagulopathy without encephalopathy has not been evaluated. METHODS Clinical and laboratory data from 68 consecutive patients with acute hepatitis and coagulopathy but ...

The authors have investigated the ability of platelets to enhance factor Xa-catalyzed activation of factor VII. Unstimulated platelets were without effect, whereas freeze/ thawed platelets substantially enhanced activation. Antifactor V antibodies did not diminish the enhancement. Platelets activated by thrombin. collagen, or calcium ionophore A23187 also enhanced factor Xa-catalyzed activation...

We examined assembly and expression of the factor X activating complex on human and rabbit alveolar macrophages. Kinetic parameters of the factor X activating reaction were determined by functional titrations of factors VII and X with macrophage tissue factor (TF) added. We found rapid activation of factor X to Xa on alveolar macrophage surfaces. Detection of rapid factor Xa formation on macrop...

Factor VII coagulant activity (FVIIc) is a potent risk factor for heart disease. The Northwick Park Heart Study (NPHS) found that elevated levels of FVIIc are associated with increased risk of fatal IHD, particularly in men over the age of 55 years and this association was stronger than that for plasma cholesterol (Meade et al. 1986). Subsequent studies have confirmed this association (Meade et...

Blood coagulation Factor M was purified 100,000fold from fresh frozen human plasma to apparent homogeneity with a yield of 30% based on coagulation assay. The molecular weight estimated by sodium dodecyl sulfate-polyacrylamide gel electrophoresis was 48,000. Factor VI1 is composed of a single polypeptide chain with the NHz-terminal sequence Ala-Asn-AlaPhe-Leu-(G1a)-(Gla)-Leu-(Arg)-Pro. It is co...

1. Perry DJ. Factor VII deficiency. Br J Haematol 2002;118: 689-700. 2. Cooper DN, Millar DS, Wacey A, Banner DW, Tuddenham EGD. Inherited factor VII deficiency: molecular genetics and pathophysiology. Thromb Haemost 1997;78:151-60. 3. Pinotti M, Etro D, Bindini D, Papa ML, Rodorigo G, Rocino A, et al. Residual factor VII activity and different hemorrhagic phenotypes in CRM(+) factor VII defici...

The properties of mouse macrophage procoagulant induced by endotoxin in vitro were studied by the acceleration of clotting and by chromogenic assays using as substrates human plasma and bovine components, which are not activated by mouse tissue factor. Maximal macrophage procoagulant activity occurred when activated cells were lysed in culture supernatant fluids, suggesting the interaction of c...

The association between the concentration of different plasma lipoproteins and plasma factor VII (F VII) was analysed by isolating plasma very low density lipoprotein (VLDL), low density lipoprotein (LDL), and high density lipoprotein (HDL) lipoproteins and assessing their in vitro interaction with F VII by immunoenzyme assay using peroxidase labelled anti-factor VII immunoglobulins to determin...