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Influence of a layer‐by‐layer‐assembled multilayer of anti‐CD34 antibody, vascular endothelial growth factor, and heparin on the endothelialization and anticoagulation of titanium surface
Author(s) -
Liu Shihui,
Liu Tao,
Chen Junying,
Maitz Manfred,
Chen Cheng,
Huang Nan
Publication year - 2013
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.34392
Subject(s) - materials science , heparin , biocompatibility , titanium , biomedical engineering , platelet , progenitor cell , vascular endothelial growth factor , cd34 , nanotechnology , immunology , medicine , cancer research , vegf receptors , microbiology and biotechnology , stem cell , biology , metallurgy
The endothelialization of the metal surface of vascular stents came into focus as a new method for improving the biocompatibility of intravascular stents. This article has its focus on building a biofunctional layer on the activated titanium surface with anti‐CD34 antibody, vascular endothelial growth factor (VEGF), and heparin by a layer‐by‐layer (LBL) self‐assembly technique, to promote the endothelialization of the surface. When compared with titanium surface, the number of adhered endothelial progenitor cells (EPCs) on LBLs increased 47.1% after 5 days culture, meanwhile the proliferation rate of EPCs on LBLs during 5 days culture also exhibit significantly improvement. The results of blood compatibility evaluation clearly show that the LBLs reduce the number of adhered and activated blood platelets (adhered: Ti 83% vs. LBL <20% and activated: Ti 57% vs. LBL 19%), and the activated partial thromboplastin time of the LBL surface prolonged about 20 s in compared with platelet‐poor plasma. The assembled LBL thus improves the thromboresistance of the titanium surface. The presented biofunctional multilayer of anti‐CD34, VEGF, and heparin on titanium can significantly improve the blood compatibility and the endothelialization of a medical device. The biofunctional layer supports generation of a new endothelium onto titanium surface by capturing EPCs and oriented differentiation. © 2012 Wiley Periodicals, Inc. J Biomed Mater Res Part A, 2013.