Thromb Haemost 2007; 98(06): 1193-1199
DOI: 10.1160/TH07-04-0256
Blood Coagulation, Fibrinolysis and Cellular Haemostasis
Schattauer GmbH

Heparanase modulates heparinoids anticoagulant activities via non-enzymatic mechanisms

Ben-Zion Katz
1   The Hematology Institute, Tel-Aviv Medical Center, Tel-Aviv
2   The Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv
,
Lars Muhl
4   The Institute for Biochemistry, Medical Faculty, Justus-Liebig-Universität, Giessen, Germany
,
Etty Zwang
1   The Hematology Institute, Tel-Aviv Medical Center, Tel-Aviv
,
Neta Ilan
3   The Bruce Rappaport Faculty of Medicine, Cancer and Vascular Biology Research Center, Technion, Haifa, Israel
,
Yair Herishanu
1   The Hematology Institute, Tel-Aviv Medical Center, Tel-Aviv
,
Varda Deutsch
1   The Hematology Institute, Tel-Aviv Medical Center, Tel-Aviv
,
Elizabeth Naparstek
1   The Hematology Institute, Tel-Aviv Medical Center, Tel-Aviv
2   The Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv
,
Israel Vlodavsky
3   The Bruce Rappaport Faculty of Medicine, Cancer and Vascular Biology Research Center, Technion, Haifa, Israel
,
Klaus T. Preissner
4   The Institute for Biochemistry, Medical Faculty, Justus-Liebig-Universität, Giessen, Germany
› Author Affiliations
Further Information

Publication History

Received 08 April 2007

Accepted after resubmission 22 October 2007

Publication Date:
30 November 2017 (online)

Preview

Summary

A key element for the physiological restriction of blood coagulation at the endothelial cell surface is its non-thrombogenic property, mainly attributed to cell surface heparan sulfate proteoglycans. Heparanase is an endo-β-D-glucuronidase with specific heparan sulfate degrading activity, which is produced and stored in platelets, and is released upon their activation. We examined the effects of heparanase pro-enzyme on coagulation functions, predominantly under physiological conditions. While heparanase pro-enzyme does not directly affect coagulation protein activities, it has profound effects on heparinoid-mediated regulation of coagulation responses, apparently via mechanisms that do not involve its enzymatic activity. Heparanase pro-enzyme reverses the anti-coagulant activity of unfractionated heparin on the coagulation pathway as well as on thrombin activity. In addition, heparanase pro-enzyme abrogated the factor X inhibitory activity of low-molecular-weight heparin (LMWH). The pro-coagulant effects of the non-active heparanase were also exerted by its major functional heparin-binding peptide. Finally, the effects of heparanase on the activity of factor VII activating protease that is auto-activated by heparinoids indicated a complete antagonistic action of heparanase in this system. Altogether, heparanase pro-coagulant activities that were also demonstrated in plasma samples from patients under LMWH treatment,point to a possible use of this molecule as antagonist for heparinoid treatment.