Platelet collagen receptors (Integrin α2β1 (GPIa/IIa), GPVI, GPIb-IX-V)

Platelet collagen receptors are a set of surface molecules—most notably integrin α2β1 (GPIa/IIa), glycoprotein VI (GPVI), and the glycoprotein Ib-IX-V complex—responsible for mediating the interaction of platelets with exposed collagen in the vascular wall, which is a critical event in initiating platelet adhesion, activation, and formation of a blood clot. Integrin α2β1 is involved primarily in platelet adhesion, while GPVI is the main signaling receptor for activation. GPIb-IX-V complex functions as a collagen receptor indirectly via von Willebrand factor, facilitating initial platelet tethering at sites of injury, especially under high shear. These receptors are considered promising targets for anti-thrombotic therapies due to their central roles in pathological thrombosis, although therapeutic targeting must balance efficacy against bleeding risk. Genetic variants in these receptors are associated with altered risks for thrombosis and some bleeding disorders. The mechanisms, signaling pathways, and effects of these receptors are being explored for better cardiovascular disease prevention and more individualized patient therapy

Other names

Glycoprotein Ia/IIa (α2β1)GPVIGPIb-IX-V complexCollagen receptorsPlatelet collagen binding receptors

Inhibition of collagen-induced platelet activation (by blocking GPVI, α2β1) Reduction of platelet adhesion to exposed collagen Prevention of thrombus growth in arterial thrombosis