Development of a compliant and cytocompatible micro-fibrous polyethylene terephthalate vascular scaffold

Download
  1. (PDF, 1 MB)
  2. Get@NRC: Development of a compliant and cytocompatible micro-fibrous polyethylene terephthalate vascular scaffold (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1002/jbm.b.31774
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleJournal of Biomedical Materials Research Part B: Applied Biomaterials
Volume97B
Issue2
Pages201214; # of pages: 14
Subjectnonwoven PET scaffolds; melt-blowing; vascular cells; compliance; shear stress
AbstractBioengineering approaches have been intensively applied to create small diameter vascular grafts using artificial materials. However, a fully successful, high performing and anti-thrombogenic structure has not been achieved yet. In this study, we have designed and fabricated a novel non-woven fibrous vascular graft with biomechanical properties closely resembling those of native vessels. Vascular cell growth, preservation of cell phenotype, retention of vasoactive properties, as well as the effect of gelatin coating on the cellular interaction with the scaffolds under static and shear stress conditions were investigated. The non-woven fibrous scaffolds were made from melt blown polyethylene terephthalate fiber webs stacked by means of a consolidation technique. The scaffold variables were fiber diameter distribution and the number of consolidated web stacks. SEM analysis confirmed various fiber diameter and pore size ranges corresponding to the different conditions. The scaffolds showed burst pressure values of ~1500 mmHg and compliance (8.4 6 ± 1.0 × 10⁻²% mmHg⁻¹) very similar to those of native arteries (~8 × 10⁻²% mmHg⁻¹). The structure with the smallest fiber diameter range (1–5 µm) and pore size range (1–20 µm) was the most suitable for the growth of human brain endothelial cells and aortic smooth muscle cells. The cells maintained their specific cell phenotype, expressed collagen and elastin and produced cAMP in response to α-calcitonin gene-related peptide. However, under shear stress conditions (0.9 dyne cm⁻²), only 30% of the cells were retained in both uncoated and gelatincoated scaffolds indicating the need for improving the cell retention capacity of these structures, which is our future research direction. This study indicates that the biomechanical and biocompatible properties of this novel vascular scaffold are promising for the development of a vascular graft with similar characteristics to those of native vessels.
Publication date
LanguageEnglish
AffiliationNRC Institute for Biological Sciences; NRC Industrial Materials Institute; National Research Council Canada
Peer reviewedYes
NRC number53834
NPARC number18398986
Export citationExport as RIS
Report a correctionReport a correction
Record identifier76f83ca8-0c10-423c-82e3-f4bf88341a11
Record created2011-08-11
Record modified2017-03-23
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)
Date modified: