Thromb Haemost 2001; 86(02): 694-701
DOI: 10.1055/s-0037-1616106
Review Article
Schattauer GmbH

A Monoclonal Antibody to Platelet Type III Collagen-binding Protein (TIIICBP) Binds to Blood and Vascular Cells, and Inhibits Platelet Vessel-wall Interactions

Emmanuel Monnet
1   U553 INSERM, Hémostase, Endothélium et Angiogénèse, Institut d’Hématologie, Université Paris VII-Denis Diderot, Hôpital Saint-Louis, Paris, France
,
Hilde Depraetere
2   Laboratory for Thrombosis Research, IRC, KU Leuven Campus Kortrijk, Kortrijk, Belgium
,
Chantal Legrand
1   U553 INSERM, Hémostase, Endothélium et Angiogénèse, Institut d’Hématologie, Université Paris VII-Denis Diderot, Hôpital Saint-Louis, Paris, France
,
Hans Deckmyn
2   Laboratory for Thrombosis Research, IRC, KU Leuven Campus Kortrijk, Kortrijk, Belgium
,
Françoise Fauvel-Lafève
1   U553 INSERM, Hémostase, Endothélium et Angiogénèse, Institut d’Hématologie, Université Paris VII-Denis Diderot, Hôpital Saint-Louis, Paris, France
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Publikationsverlauf

Received 25. Oktober 2000

Accepted after resubmission 15. Februar 2001

Publikationsdatum:
12. Dezember 2017 (online)

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Summary

TIIICBP is a new platelet receptor involved in platelet-type III collagen and platelet-subendothelium interactions. This receptor is composed of a doublet of 72-68 kDa proteins. In this study, the major protein (68 kDa) was purified and used to produce monoclonal antibodies. One of these antibodies, 7F4, binds to platelets as confirmed by flow cytometry. 7F4 inhibited platelet contact, spreading and aggregation induced by type III collagen. Under flow conditions, 7F4 prevented platelet interactions with type III collagen, endothelial cell matrix and the KOGEOGPK type III collagen octapeptide: the specific sequence recognized by TIIICBP. On the other hand, 7F4 had no effect on platelet-type I collagen interactions. TIIICBP was also detected on lymphocytes, granulocytes and monocytes. TIIICBP was expressed on endothelial cells and fibroblasts but not on smooth-muscle cells. These results show that TIIICBP is expressed on several cell types and participates in cell adhesion to the subendothelium.