Collagen exposure-mediated coagulation cascade activation

Upon vascular injury, exposed collagen in the vessel wall acts as a pro-thrombotic surface, rapidly binding platelets (primarily via glycoprotein VI and von Willebrand factor). This triggers platelet activation, aggregate formation, and the release of factors that amplify the response. Simultaneously, exposure to collagen activates the coagulation (clotting) cascade via the intrinsic pathway, starting with activation of factor XII, and culminating in thrombin generation and fibrin formation. The end result is the formation of a platelet–fibrin clot that seals the vascular damage. This process is essential for hemostasis but can lead to pathological thrombosis if inappropriately activated. It is not a single molecular target but rather a process involving interactions between matrix proteins, coagulation factors, and cellular receptors.

Other names

Collagen-triggered coagulationCollagen-induced coagulation cascadeCollagen-mediated thrombus formation

Anticoagulants block various steps of the coagulation cascade (e.g., factor Xa, thrombin inhibition) Antiplatelet drugs prevent platelet adhesion/activation Blocking collagen–receptor interaction (e.g., glycoprotein VI inhibitors)