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Interactions between endothelial cells and a poly(carbonate-silsesquioxane-bridge-urea)urethane

Paper ID Volume ID Publish Year Pages File Format Full-Text
12081 777 2005 9 PDF Available
Title
Interactions between endothelial cells and a poly(carbonate-silsesquioxane-bridge-urea)urethane
Abstract

We have recently developed a polymer which contains silsesquioxane in the form of nano-bridges poly(carbonate-silsesquioxane-bridge-urea)urethane (PCBSU) for cardiovascular device applications. The polymer has been characterised and the durability has been confirmed with long-term in vivo tests. The aim of this study was to test the cytocompatibility of the new polymer and to investigate any potential cytotoxic effects. To assess the effect of direct contact with PCBSU sections of polymer material were cut and placed into a 24-well plate. Six discs were seeded with 2×105 human umbilical vein cells (HUVEC). As a positive control, six wells were seeded with the same number of HUVEC. In a further experiment to assess indirect contact with PCBSU a sample of the polymer was powdered using a Micro-Dismembrator. Cell culture medium was exposed to powdered polymer (1–100 mg/ml) for a period of 7 days. HUVEC seeded as above were then exposed to the treated cell culture medium for 24 and 96 h. Finally, cell proliferation was studied over 16 days by seeding 2×105 HUVEC on films of PCBSU cast in glass Petri dishes. Cell viability and growth were assessed using Alamar blue™, lactate dehydrogenase and Pico green assays and morphology was studied by Toluidine blue staining and scanning electron microscopy. Viable cells were demonstrated to be present after 16 days seeded on PCBSU. Exposing cells to PCBSU-treated cell culture medium resulted in no apparent damage to the cells at concentrations of 1 or 10 mg/ml, and only a slight reduction at 100 mg/ml after 96 h exposure. This study demonstrates that PCBSU can support the growth of endothelial cells for a prolonged period and does not demonstrate any significant toxic effects to cells. Thus it has the potential to be used both as a medical device and as scaffolding in tissue engineering applications.

Keywords
Cell viability; Copolymer; Cytotoxicity; Bypass graft; Stent; Polymer; Silsesquioxane; Silsesquioxane nano-bridges; Medical device
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 26, Issue 32, November 2005, Pages 6271–6279
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us