Controlled fabrication of a biological vascular substitute

Joel Stitzel, Jie Liu, Sang Jin Lee, Makoto Komura, Joel Berry, Shay Soker, Grace Lim, Mark Van Dyke, Richard Czerw, James J. Yoo, Anthony Atala

Research output: Contribution to journalArticle

363 Scopus citations

Abstract

Autologous and synthetic vessel grafts have been used as a vascular substitute for cardiovascular bypass procedures. However, these materials are limited by the availability of appropriate caliber autologous vessels, increased susceptibility to thrombosis and intimal hyperplasia following surgery. Electrospinning technology offers the potential for controlling composition, structure and mechanical properties of biomaterials. Vascular graft scaffolds have been fabricated using electrospun polymer blends of Type I collagen, elastin from ligamentum nuchae, and poly (d,l-lactide-co-glycolide). This study demonstrates improved electrospinning characteristics versus previous studies by increasing polymer concentration and adding PLGA to the polymer blend. Additionally, new in vitro biocompatibility and mechanical testing data is presented. The scaffolds possess tissue composition and mechanical properties similar to native vessels. The electrospun vessel matrix is biocompatible and does not elicit local or systemic toxic effects when implanted in vivo. This study demonstrates the promise of electrospinning as a fabrication process for a functional vascular graft for clinical use.

Original languageEnglish (US)
Pages (from-to)1088-1094
Number of pages7
JournalBiomaterials
Volume27
Issue number7
DOIs
StatePublished - Mar 1 2006

Keywords

  • Collagen
  • Elastin
  • Electrospinning
  • Mechanical properties
  • Scaffold
  • Vascular grafts

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Biomedical Engineering

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    Stitzel, J., Liu, J., Lee, S. J., Komura, M., Berry, J., Soker, S., Lim, G., Van Dyke, M., Czerw, R., Yoo, J. J., & Atala, A. (2006). Controlled fabrication of a biological vascular substitute. Biomaterials, 27(7), 1088-1094. https://doi.org/10.1016/j.biomaterials.2005.07.048