A large body of evidence has shown that systemic coagulopathy is a key event in severe systemic inflammation, such as that which occurs in sepsis. Systemic coagulopathy is the net result of activation of coagulation and defective systems of natural inhibition of coagulation, on the one hand, and attenuation of fibrinolysis on the other. Activation of coagulation is primarily driven by the extri...

The high specificity of blood coagulation proteases has been attributed not only to residues surrounding the active site but also to other surface domains that are involved in recognizing and interacting with macromolecular substrates and inhibitors. Specific blood coagulation inhibitors obtained from exogenous sources such as blood sucking salivary glands and snake venoms have been identified....

Inhibitors to factor V is a rare phenomenon with varied clinical presentation ranging from asymptomatic states life-threatening bleeds. They are known be associated exposure bovine thrombin, drugs, autoimmune diseases and malignancies. Establishing the diagnosis of FV inhibitors challenging presence lupus-like properties inhibitor can further complicate diagnosis. Here we document an unusual ca...

The present study began with mathematical modeling of how inhibitors of both factor Xa (fXa) and thrombin affect extrinsic pathway-triggered blood coagulation. Numerical simulation demonstrated a stronger inhibition of thrombin generation by a thrombin inhibitor than a fXa inhibitor, but both prolonged clot time to a similar extent when they were given an equal dissociation constant (30 nM) for...

Venous and arterial thromboembolic diseases are still the most frequent causes of death and disability in high-income countries. Clinical anticoagulants are inhibitors of enzymes involved in the coagulation pathway, such as thrombin and factor X(a). Thrombin is a key enzyme of blood coagulation system, activating the platelets, converting the fibrinogen to the fibrin net, and amplifying its sel...

Acquired haemophilia A (AHA) is a rare hemorrhagic disease caused by an autoantibody against coagulation factor VIII. Nonhaemophiliac patients develop autoantibodies (inhibitors) directed against the factor VIII circulating coagulation protein. Disease is associated with an increased morbidity and mortality. Inhibitors against FVIII induce acute and life-threatening hemorrhagic diathesis becaus...

Introduction Case Physiology of Hemostasis Vasoconstriction Primary Hemostasis Platelet Adhesion Platelet Granule Release Reaction Platelet Aggregation and Consolidation Secondary Hemostasis: The Coagulation Cascade Regulation of Hemostasis Pathogenesis of Thrombosis Endothelial Injury Abnormal Blood Flow Hypercoagulability Pharmacologic Classes and Agents Antiplatelet Agents Cyclooxygenase Inh...

The present antithrombotic drugs used to treat or prevent ischemic stroke have significant limitations: either they show only moderate efficacy (platelet inhibitors), or they significantly increase the risk for hemorrhages (thrombolytics, anticoagulants). Although most strokes are caused by thrombotic or embolic vessel occlusions, the pathophysiological role of platelets and coagulation is larg...

An association between cancer and thrombosis has been recognized for more than a century. However, the manner by which tumor growth is regulated by coagulation in vivo remains unclear. To assess the role of coagulation on tumor growth, in vivo, we tested coagulation inhibitors specific for either tissue factor (TF)/factor VIIa (fVIIa) complexes or factor Xa (fXa) for antitumor activity. Here, w...