Search results for: Rabbit Anti-Human Collagen I Antibodies
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Anti-thrombotic effects and bleeding risk of AJvW-2, a monoclonal antibody against human von Willebrand factor.
1. A murine anti-human vWF monoclonal antibody, AJvW-2, was developed that inhibited the interaction between platelet glycoprotein Ib (GPIb) and von Willebrand factor (vWF) during the ristocetin- (IC50 = 0.7 +/- 0.1 microgram ml-1) and botrocetin- (IC50 = 1.8 +/- 0.3 microgram ml-1) induced aggregation of human platelets. 2. AJvW-2 inhibited the high shear stress (10.8 N m-2) induced aggregation of human platelets dose-dependently with an IC50 = 2.4 +/- 0.3 micrograms ml-1, but had no effect on low shear stress induced platelet aggregation (1.2 N m-2) up to 100 micrograms ml-1. 3. AJvW-2 also inhibited the high shear stress (5.0 N m-2) induced adhesion of human platelets to collagen I with the same efficacy (IC50 = 2.4 +/- 0.3 micrograms ml-1), but no effect at low shear conditions (1.5 N m-2). 4. AJvW-2 inhibited the botrocetin-induced aggregation of platelets from guinea-pig, rat, rabbit, dog and pig at the same concentration range as human platelets; it likewise also inhibited the high shear stress induced aggregation and adhesion to collagen I of guinea-pig platelets. 5. AJvW-2 prevented arterial thrombus formation in guinea-pigs at a dose of 100 micrograms kg-1 without prolonging the template bleeding time, whereas the GPIIb/IIIa antagonists lamifiban mediated inhibition of thrombosis at 1000 micrograms kg-1 was accompanied by a significant prolongation of the bleeding time. 6. These results suggest that AJvW-2 is a potent inhibitor of the GPIb-vWF interaction and a potential novel antithrombotic agent with lower bleeding risk than GPIIb/IIIa antagonists.S Kageyama, H Yamamoto, M Nagano, H Arisaka, T Kayahara, R Yoshimoto
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0.1 mg0.1 mg100ul100 ul100ug25 Mg0.1 mg1mg0.1 mg100μl100ug Lyophilized100ulRelated Pathways
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