Physiologic coagulation protein network

The physiologic coagulation protein network, commonly referred to as the coagulation cascade, is a highly regulated system of plasma proteins that interact to achieve hemostasis through the formation of a fibrin clot [StatPearls: Physiology, Coagulation Cascade]. This network operates via a series of zymogen activations, primarily involving serine proteases, and is traditionally categorized into the intrinsic, extrinsic, and common pathways [PubMed: Mechanisms of Coagulation]. Its primary biological function is to prevent exsanguination following vascular injury while maintaining blood fluidity under normal conditions [NIH: Blood Clotting]. Pathological activation or deficiency within this network leads to significant clinical conditions, including venous thromboembolism, arterial thrombosis, and various bleeding disorders like hemophilia [StatPearls: Physiology, Coagulation Cascade]. Pharmacological modulation of this network is a cornerstone of cardiovascular medicine, utilizing anticoagulants that target specific nodes such as Factor Xa or Thrombin to mitigate thrombotic risk [PubMed: Anticoagulant Therapy]. The network also interacts with the inflammatory and complement systems, highlighting its role beyond simple clot formation [PubMed: Coagulation and Inflammation].

Other names

Coagulation cascadeBlood clotting systemHemostatic systemClotting cascade

Inhibition of serine proteases such as Factor Xa and Thrombin, antagonism of Vitamin K-dependent carboxylation of clotting factors, or potentiation of endogenous inhibitors like antithrombin III.