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Expression of fibrinolysis activators and their inhibitor in neointima of polyester vascular grafts. | LitMetric

Expression of fibrinolysis activators and their inhibitor in neointima of polyester vascular grafts.

Biomaterials

Department of Vascular Surgery and Transplantology, Medical University in Bialystok, MC Sklodowskiej Curie 24A st, 15-276, Poland.

Published: December 2004

AI Article Synopsis

Article Abstract

The aim of the study was to evaluate dynamic changes in the expression of fibrinolytic system components in neointima forming in polyester vascular grafts. The study was carried out on 18 mongrel dogs divided into three groups, that underwent replacement of abdominal aorta with a polyester double velour prosthesis. Grafts were removed at 1, 4 and 12 months. The specimens were fixed according to AMeX method. Immunohistochemical labeling for von Willebrand factor (vWf), tissue plasminogen activator (t-PA), urokinase (u-PA), its receptor (u-PAR), plasminogen activator inhibitor type 1 (PAI-1) and D-dimer (DD) was performed. Increasing intensity of vWf expression on the graft luminal surface was found in successive periods of the study. A light positive t-PA and u-PA staining was shown in neointima at 1 month and its intensity was significantly increased at 4 and 12 months. Expression of u-PAR appeared at 4 months. A light positive PAI-1 and DD staining was demonstrated in neointima in all periods of the study. The results demonstrated increasing expression of fibrinolysis activators in neointima of polyester vascular grafts. Intensive expression of plasminogen activators, when compared to their inhibitor may reduce thrombotic properties of graft neointima particularly in the late period after prosthesis implantation.

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Source
http://dx.doi.org/10.1016/j.biomaterials.2004.02.008DOI Listing

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