Platelet glycoprotein Ib-IX-V receptor complex (GPIb-IX-V)

The Platelet glycoprotein Ib-IX-V receptor complex is a vital adhesion receptor found on the surface of platelets, primarily responsible for mediating the initial tethering and rolling of platelets on the damaged vascular wall. This process occurs through the binding of the GPIb-alpha subunit to the A1 domain of von Willebrand factor (vWF), which is itself immobilized on subendothelial collagen exposed during vascular injury. This interaction is particularly critical under high-shear stress conditions found in arteries and microvessels, serving as the first step in the formation of a platelet plug. In pathological states, overactivity or inappropriate activation of this axis leads to arterial thrombosis, contributing to conditions such as myocardial infarction and ischemic stroke. Conversely, genetic deficiencies in the complex result in Bernard-Soulier syndrome, a severe bleeding disorder. Therapeutic strategies targeting this receptor or its interaction with vWF aim to provide potent antithrombotic effects with a potentially lower risk of bleeding compared to traditional antiplatelet agents like aspirin or P2Y12 inhibitors. Note: The target name provided combines the receptor (GPIb) and the substrate (collagen), which are distinct entities linked by vWF; however, the GPIb-vWF-collagen axis is a recognized therapeutic pathway in cardiovascular medicine.

Other names

Glycoprotein Ib-IX-V complexGPIb-V-IXCD42 complexPlatelet glycoprotein Ib receptorvon Willebrand factor receptor

Inhibition of the interaction between the platelet GPIb-IX-V complex and von Willebrand factor (vWF) tethered to subendothelial collagen, thereby preventing platelet tethering and rolling at sites of high shear stress.