Platelet GPIb: sensing force and responding

Platelet GPIb: sensing force and responding.

Platelet glycoprotein (Gp) IX associates with GpIb alpha in the platelet membrane GpIb complex.

The platelet membrane glycoprotein (Gp) Ib complex consists of four polypeptides: the disulfide-linked GpIb alpha and GpIb beta subunits; GpIX, tightly, but noncovalently associated with GpIb alpha-beta; and the more weakly associated GpV. It is not certain whether the association of GpIX to Gplb alpha-beta is via GpIB alpha, GpIb beta, or both subunits, although recently published evidence imp...

Glycoprotein Ib (GPIb)-dependent and GPIb-independent pathways of thrombin-induced platelet activation.

In this study, the question of whether glycoprotein Ib (GPIb) mediates both high and moderate affinity pathways of alpha-thrombin-induced platelet activation was examined. Flow cytometric studies, using a panel of monoclonal antibodies (MoAbs), showed that Serratia marcescens protease treatment removed greater than 97% of the glycocalicin portion of GPIb but did not affect the changes in the ex...

Targeting platelet GPIbβ reduces platelet adhesion, GPIb signaling and thrombin generation and prevents arterial thrombosis.

OBJECTIVE The glycoprotein (GP) Ib-V-IX complex regulates the adhesion, activation, and procoagulant activity of platelets. We previously reported that RAM.1, a rat monoclonal antibody directed against the extracellular domain of mouse GPIbβ, diminished adhesion of platelets and chinese hamster ovary cells transfected with the human GPIb-IX complex to von Willebrand factor under flow conditions...

Platelet GPIb-IX has suppressive effects on septic inflammation.