Initiation of Platelet Adhesion by Arrest onto Fibrinogen or Translocation on von Willebrand Factor

  title={Initiation of Platelet Adhesion by Arrest onto Fibrinogen or Translocation on von Willebrand Factor},
  author={Brian R Savage and Enrique Saldivar and Zaverio M. Ruggeri},
We have identified two distinct mechanisms initiating the adhesion of flowing platelets to thrombogenic surfaces. The intergrin alpha IIb beta 3 promotes immediate arrest onto fibrinogen but is fully efficient only at wall shear rates below 600-900 s-1, perhaps because of a relatively slow rate of bond formation or low resistance to tensile stress. In contrast, glycoprotein Ib alpha binding to immobilized von Willebrand factor (vWF) appears to have fast association and dissociation rates as… CONTINUE READING
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