Thromb Haemost 2008; 99(03): 576-585
DOI: 10.1160/TH07-10-0623
Endothelium and Vascular Development
Schattauer GmbH

Tissue factor pathway inhibitor (TFPI) interferes with endothelial cell migration by inhibition of both the Erk pathway and focal adhesion proteins

Mathieu Provençal
1   Laboratoire de médecine moléculaire, Hôpital Ste-Justine-UQAM, Centre de cancérologie Charles-Bruneau, Centre de Recherche de l’Hôpital Sainte-Justine, Chemin Côte-Sainte-Catherine, Montréal, Québec, Canada
,
Marisol Michaud
1   Laboratoire de médecine moléculaire, Hôpital Ste-Justine-UQAM, Centre de cancérologie Charles-Bruneau, Centre de Recherche de l’Hôpital Sainte-Justine, Chemin Côte-Sainte-Catherine, Montréal, Québec, Canada
,
Édith Beaulieu
1   Laboratoire de médecine moléculaire, Hôpital Ste-Justine-UQAM, Centre de cancérologie Charles-Bruneau, Centre de Recherche de l’Hôpital Sainte-Justine, Chemin Côte-Sainte-Catherine, Montréal, Québec, Canada
,
David Ratel
1   Laboratoire de médecine moléculaire, Hôpital Ste-Justine-UQAM, Centre de cancérologie Charles-Bruneau, Centre de Recherche de l’Hôpital Sainte-Justine, Chemin Côte-Sainte-Catherine, Montréal, Québec, Canada
,
Georges-Étienne Rivard
2   Service d'Hématologie-Oncologie, Hôpital Ste-Justine, Montréal, Québec, Canada
,
Denis Gingras
1   Laboratoire de médecine moléculaire, Hôpital Ste-Justine-UQAM, Centre de cancérologie Charles-Bruneau, Centre de Recherche de l’Hôpital Sainte-Justine, Chemin Côte-Sainte-Catherine, Montréal, Québec, Canada
,
Richard Béliveau
1   Laboratoire de médecine moléculaire, Hôpital Ste-Justine-UQAM, Centre de cancérologie Charles-Bruneau, Centre de Recherche de l’Hôpital Sainte-Justine, Chemin Côte-Sainte-Catherine, Montréal, Québec, Canada
2   Service d'Hématologie-Oncologie, Hôpital Ste-Justine, Montréal, Québec, Canada
› Author Affiliations

Financial support: This work was supported by a grant from the Canadian Institutes for Health Research to R.B. and D.G.
Further Information

Publication History

Received: 19 October 2007

Accepted after major revision: 21 January 2008

Publication Date:
07 December 2017 (online)

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Summary

Tissue factor pathway inhibitor (TFPI) is a plasma Kunitz-type serine protease inhibitor that is mainly known for its inhibition of tissue factor-mediated coagulation. In addition to its anticoagulant properties, emerging data show that TFPI may also regulate endothelial cell functions via a non-haemostatic pathway. In this work we demonstrate that at concentrations within the physiological range,TFPI inhibits both endothelial cell migration and their differentiation into capillary-like structures in vitro. These effects were specific to endothelial cells since no inhibitory effect was observed on the migration of tumor (glio- blastoma) cells. Inhibition of endothelial cell migration was correlated with a concomitant loss in cell adhesion,suggesting an alteration of focal adhesion complex integrity. Accordingly,we observed thatTFPI inhibited the phosphorylation of focal adhesion kinase and paxillin,two key proteins involved in the scaffolding of these complexes, and that this effect was specific to endothelial cells. These results suggest that TFPI influences the angiogenic process via a non-haemostatic pathway, by downregulating the migratory mechanisms of endothelial cells.