In vascular tissue engineering, great attention is paid to the immobilization of biomolecules onto synthetic grafts to increase bio- and hemocompatibilitytwo critical milestones in the field. The surface modification field of poly(ethylene terephthalate) (PET), a well-known vascular-graft material, is matured and oversaturated. Nevertheless, most developed methods are laborious multistep procedures generally accompanied by coating instability or toxicity issues. Herein, a straightforward surface modification procedure is presented engineered to simultaneously promote surface endothelialization and anticoagulation properties via the covalent immobilization of gelatin through a photoactivated azide derivative. A complete physicochemical characterization and biological study including cytotoxicity and endotoxin testing are performed. In addition, biocompatibility toward small (diameter 6 mm) and/or large caliber (diameter 6 mm) vessels is assessed by micro- and macrovascular endothelial cell assays. Superior bio- and hemocompatibility properties are seen for the gelatin-covalently modified PET surfaces compared to the conventional surface-modification procedures based on physisorption.
Original languageEnglish
Article number1800125
Pages (from-to)1-11
Number of pages11
JournalMacromolecular Bioscience
Issue number7
Publication statusPublished - Jul 2018

    Research areas

  • azide photografting, endothelialization, endotoxin content, hemocompatibility, poly(ethylene terephthalate)

ID: 39035696