Blood coagulation often accompanies bacterial infections and sepsis and is generally accepted as a consequence of immune responses. Though many bacterial species can directly activate individual coagulation factors, they have not been shown to directly initiate the coagulation cascade that precedes clot formation. Here we demonstrated, using microfluidics and surface patterning, that the spatia...

The intimate connection between coagulation and inflammation in the pathogenesis of vascular disease has moved more and more into focus of clinical research. This paper focuses on the essential components of this interplay in the settings of cardiovascular disease and acute coronary syndrome. Tissue factor, the main initiator of the extrinsic coagulation pathway, plays a central role via causin...

Objective – To review the current model describing coagulation processes, including the critical contributions of cells. Data Sources – Original research articles, scientific reviews, and textbooks. Data Synthesis – Normal hemostasis is vital for prevention of blood loss, but controls are necessary to limit coagulation to the site of injury. The previous cascade model of blood coagulation, alth...

Initiation of blood coagulation by tissue factor (TF) is a robust, highly regulated process. Both the spatial distribution of TF and the geometry of the vasculature may play important roles in regulating coagulation. As this review describes, microfluidic systems provide a unique opportunity for investigating the spatiotemporal dynamics of blood coagulation in vitro. Microfluidic systems with s...

Bacterial endotoxins and antigen-antibody aggregates activate complement, accelerate blood coagulation, and are implicated in intravascular blood clotting (1-7). Tha t their effect on blood coagulation proceeds through the activation of the complement system has been suspected bu t has never been shown. We have found that these and other complement-activating materials initiate blood coagulatio...

The coagulation/fibrinolysis system is essential for wound healing after vascular injury. According to the standard paradigm, the synthesis of most coagulation factors is restricted to liver, platelets and endothelium. We challenged this interpretation by measuring coagulation factors in nine human primary cell types. FX mRNA was expressed by fibroblasts, visceral preadipocytes/adipocytes and h...

Platelet activation and blood coagulation are complementary, mutually dependent processes in haemostasis and thrombosis. Platelets interact with several coagulation factors, while the coagulation product thrombin is a potent platelet-activating agonist. Activated platelets come in a procoagulant state after a prolonged elevation in cytosolic [Ca2+]i. Such platelets, e.g. when adhering to collag...

Disseminated intravascular coagulation is a frequent complication of sepsis. Coagulation activation, inhibition of fibrinolysis, and consumption of coagulation inhibitors lead to a procoagulant state resulting in inadequate fibrin removal and fibrin deposition in the microvasculature. As a consequence, microvascular thrombosis contributes to promotion of organ dysfunction. Recently, three rando...

Activation of inflammatory and coagulation pathways is an important event in the pathogenesis of sepsis. In sepsis, which can be defined as the disadvantageous systemic host response to infection, the blood coagulation system is triggered. Activation of coagulation and deposition of fibrin as a consequence of inflammation can be considered instrumental in containing inflammatory activity to the...

were found to have evidence of a generalized hemostatic disorder. These patients could be divided into three groups. The first group consisted of three patients with increased fibrinogen catabolism without clinical or laboratory evidence of intravascular coagulation. The second group of five patients had laboratory evidence of intravascular coagulation without clinically evident bleeding or thr...