Biologically Functionalized Expanded Polytetrafluoroethylene Blood Vessel Grafts

Dongfang Wang, Yiyang Xu, Yu Jyun Lin, Galip Yilmaz, Jue Zhang, George Schmidt, Qian Li*, James A. Thomson, Lih Sheng Turng*

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

25 Scopus citations


Cardiovascular diseases plague human health because of the lack of transplantable small-diameter blood vessel (SDBV) grafts. Although expanded polytetrafluoroethylene (ePTFE) has the potential to be used as a biocompatible material for SDBV grafts, long-term patency is still the biggest challenge. As discussed in this paper, by virtue of a novel material formulation and a new and benign alcohol/water lubricating agent, biofunctionalized ePTFE blood vessel grafts aimed at providing long-term patency were fabricated. Compared to the most prevalent modification of PTFE, namely surface treatment, this method realized bulk treatment, which could guarantee homogeneous and long-lasting performance throughout PTFE products. These blood vessel grafts included embedded functional biomolecules, such as arginylglycylaspartic acid, heparin, and selenocystamine, using water as a solvent in paste extrusion and in the expansion of ePTFE. Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscope results confirmed the existence of these targeting biomolecules in the as-fabricated ePTFE blood vessel grafts. Meanwhile, the greatly improved biological functions of the grafts were demonstrated via live and dead assays, cell morphology, CD31 staining, nitric oxide (NO) release, and anticoagulation tests. This novel and benign material formulation and fabrication method provides an opportunity to produce multibiofunctional ePTFE blood vessel grafts in a single step, thus yielding a potent product with significant commercial and clinical potential.

Original languageEnglish
Pages (from-to)3807-3816
Number of pages10
Issue number9
StatePublished - 14 09 2020
Externally publishedYes

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Copyright © 2020 American Chemical Society.


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