USPIO-labeled textile materials for non-invasive MR imaging of tissue-engineered vascular grafts

Marianne E. Mertens, Sabine Koch, Philipp Schuster, Jakob Wehner, Zhuojun Wu, Felix Gremse, Volkmar Schulz, Lisanne Rongen, Frederic Wolf, Julia Frese, Valentine N. Gesche, Marc van Zandvoort, Petra Mela, Stefan Jockenhoevel, Fabian Kiessling*, Twan Lammers

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

51 Citations (Web of Science)

Abstract

Non-invasive imaging might assist in the clinical translation of tissue-engineered vascular grafts (TEVG). It can e.g. be used to facilitate the implantation of TEVG, to longitudinally monitor their localization and function, and to provide non-invasive and quantitative feedback on their remodeling and resorption. We here incorporated ultrasmall superparamagnetic iron oxide (USPIO) nanoparticles into polyvinylidene fluoride (PVDF)-based textile fibers, and used them to prepare imageable tissue-engineered vascular grafts (iTEVG). The USPIO-labeled scaffold materials were molded with a mixture of fibrin, fibroblasts and smooth muscle cells, and then endothelialized in a bioreactor under physiological flow conditions. The resulting grafts could be sensitively detected using T1-, T2- and T2*-weighted MRI, both during bioreactor cultivation and upon surgical implantation into sheep, in which they were used as an arteriovenous shunt between the carotid artery and the jugular vein. In?vivo, the iTEVG were shown to be biocompatible and functional. Post-mortem ex?vivo analyses provided evidence for efficient endothelialization and for endogenous neo-vascularization within the biohybrid vessel wall. These findings show that labeling polymer-based textile materials with MR contrast agents is straightforward and safe, and they indicate that such theranostic tissue engineering approaches might be highly useful for improving the production, performance, personalization and translation of biohybrid vascular grafts.
Original languageEnglish
Pages (from-to)155-163
JournalBiomaterials
Volume39
DOIs
Publication statusPublished - Jan 2015

Keywords

  • Tissue engineering
  • Vascular graft
  • Textile material
  • MRI
  • USPIO

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