Physiological coagulation and regulatory proteins

Physiological coagulation and regulatory proteins in human plasma represent a complex system of enzymes, cofactors, and inhibitors that maintain hemostasis by balancing clot formation and dissolution (Palta et al., 2014). This system primarily consists of serine proteases, such as Thrombin (Factor IIa) and Factor Xa, which are activated in a cascading fashion to convert fibrinogen into a stable fibrin clot (Gale, 2011). Regulatory proteins, including Antithrombin III, Protein C, and Protein S, serve as critical checkpoints to prevent excessive thrombosis and ensure blood flow remains fluid (Dahlbäck, 2000). Dysregulation of these proteins leads to significant pathologies, ranging from life-threatening bleeding disorders like Hemophilia to thromboembolic events such as deep vein thrombosis and stroke (StatPearls, 2023). Consequently, these proteins are among the most clinically significant therapeutic targets, with drugs like direct oral anticoagulants (DOACs), heparins, and vitamin K antagonists acting to modulate their activity. Understanding the interplay between these factors is essential for managing cardiovascular health and surgical outcomes.

Other names

Coagulation factorsClotting factorsPlasma proteasesHemostatic proteinsBlood clotting system

Direct inhibition of Factor Xa; direct inhibition of Thrombin (Factor IIa); potentiation of Antithrombin III; inhibition of Vitamin K epoxide reductase (VKORC1) to prevent synthesis of functional factors II, VII, IX, and X; activation of plasminogen to plasmin for fibrinolysis.