Thromb Haemost 1988; 60(03): 514-517
DOI: 10.1055/s-0038-1647002
Original Article
Schattauer GmbH Stuttgart

Interaction of Thrombin-Stimulated Platelets with Vitronectin (S-Protein of Complement) Substrate: Inhibition by a Monoclonal Antibody to Glycoprotein IIb-IIIa Complex

Perumal Thiagarajan
The Department of Medicine, Division of Hematology, University of Washington, Seattle, WA, USA
,
Kathleen Kelly
The Department of Medicine, Division of Hematology, University of Washington, Seattle, WA, USA
› Author Affiliations
Further Information

Publication History

Received 25 April 1988

Accepted after revision 23 August 1988

Publication Date:
30 June 2018 (online)

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Summary

Platelets adhere to vitronectin substrate following activation with physiological concentrations of thrombin. Adhesion of activated platelets to vitronectin substrate is dependent upon the presence of divalent cations, the amount of vitronectin, and the duration of adhesion assay. The adhesion of platelets is inhibited by synthetic peptides containing the sequence of Arg-Gly-Asp. In addition, monoclonal antibodies to glycoprotein IIb-IIIa complex inhibit the adhesion of activated platelets to vitronectin substrate in a dose-dependent manner. These studies suggest that the glycoprotein IIb-IIIa complex on activated platelets may interact with vitronectin substrate through the Arg-Gly-Asp mechanism. Since vitronectin is present in the subendothelial matrix, it might be involved in platelet-vessel wall interactions