Heparanase Regulates Thrombosis in Vascular Injury and Stent-Induced Flow Disturbance

JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY

卷:59

Article

Baker, Aaron B.¹  Gibson, William J.²  Kolachalama, Vijaya B.²  Golomb, Mordechai²  Indolfi, Laura²  Spruell, Christopher¹  Zcharia, Eyal³  Edelman, Elazer R.^2,3,4 

[1] Univ Texas Austin, Dept Biomed Engn, Austin, TX 78712 USA

[2] MIT, Harvard MIT Div Hlth Sci & Technol, Cambridge, MA 02139 USA

[3] Technion Israel Inst Technol, Bruce Rappaport Fac Med, Canc & Vasc Biol Res Ctr, IL-31096 Haifa, Israel

[4] Harvard Univ, Brigham & Womens Hosp, Div Cardiovasc, Brigham & Womens Hosp, Boston, MA 02115 USA

关键词: computational modeling;    endovascular stenting;    heparanase;    thrombosis;    vascular injury;   

DOI  :  10.1016/j.jacc.2011.11.057

来源: Elsevier

【 摘 要 】

Objectives The purpose of this study was to examine the role of heparanase in controlling thrombosis following vascular injury or endovascular stenting. Background The use of endovascular stents are a common clinical intervention for the treatment of arteries occluded due to vascular disease. Both heparin and heparan sulfate are known to be potent inhibitors of thrombosis. Heparanase is the major enzyme that degrades heparan sulfate in mammalian cells. This study examined the role of heparanase in controlling thrombosis following vascular injury and stent-induced flow disturbance. Methods This study used mice overexpressing human heparanase and examined the time to thrombosis using a laser-induced arterial thrombosis model in combination with vascular injury. An ex vivo system was used to examine the formation of thrombus to stent-induced flow disturbance. Results In the absence of vascular injury, wild type and heparanase overexpressing (HPA Tg) mice had similar times to thrombosis in a laser-induced arterial thrombosis model. However, in the presence of vascular injury, the time to thrombosis was dramatically reduced in HPA Tg mice. An ex vivo system was used to flow blood from wild type and HPA Tg mice over stents and stented arterial segments from both animal types. These studies demonstrate markedly increased thromboses on stents with blood isolated from HPA Tg mice in comparison to blood from wild type animals. We found that blood from HPA Tg animals had markedly increased thrombosis when applied to stented arterial segments from either wild type or HPA Tg mice. Conclusions Taken together, this study's results indicate that heparanase is a powerful mediator of thrombosis in the context of vascular injury and stent-induced flow disturbance. (J Am Coll Cardiol 2012; 59: 1551-60) (C) 2012 by the American College of Cardiology Foundation

【 授权许可】

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