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Macrophage responses to vascular stent coatings

Ball, M, O'Brien, A, Dolan, F, Abbas, GA and McLaughlin, JAD (2004) Macrophage responses to vascular stent coatings. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A, 70A (3). pp. 380-390. [Journal article]

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URL: http://www3.interscience.wiley.com/cgi-bin/fulltext/109085659/PDFSTART?CRETRY=1&SRETRY=0

DOI: 10.1002/jbm.a.30066


Diamond-like carbon (DLC) films have been proposed as potential coatings for blood-contacting devices. In this study, tetrahedral amorphous carbon (ta-C) films deposited by filtered cathodic vacuum arc system (FCVA) were compared with commercially deposited polyurethane coatings (PU) and uncoated stainless steel samples. X-ray reflectivity (XRR) measurements were performed to check density and thickness of the ta-C coatings, and contact angles measurements were used to assess surface wettability. J774 macrophages were used to assess the cell responses to the materials. Cell number, metabolic activity, and hydrogen peroxide production were measured by using biochemical assays, and the cell attachment and morphology were determined by using scanning electron microscopy and confocal laser scanning microscopy. Wettability measurements showed that of the materials, the stainless steel was the most hydrophilic, and the ta-C coatings were the most hydrophobic. Although the initial attachment and morphology did notappear to be dependent on the wettability, the cell numbers did increase with increasing wettability. Macrophages on the stainless steel samples were the most active in producing hydrogen peroxide. These data show that ta-C samples performed as well as commercialPU-coated samples in blocking cell reactions to the substrate and may prove to be effective coatings for blood-contacting materials. (C) 2004 Wiley Periodicals, Inc.

Item Type:Journal article
Keywords:thin film coating; tetrahedral amorphous carbon; cell adhesion; inflammation; macrophages
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:296
Deposited By: Mrs Ann Blair
Deposited On:19 Oct 2009 12:53
Last Modified:15 Jun 2011 09:51

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