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Updated: Dec 21, 2025
Wet Chemistry and Peptide Immobilization on Polytetrafluoroethylene for Improved Cell-adhesion
Published on: August 15, 2016
Mussel-inspired triblock functional protein coating with endothelial cell selectivity for endothelialization
Weiwei Zheng1, Min Liu1, Haishan Qi1
1Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China; Key Laboratory of Systems Bioengineering (Ministry of Education), PR China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin): School of Chemical Engineering and Technology, Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (MOE), Tianjin University, Tianjin 300072, PR China.
A novel protein coating promotes endothelial cell growth on artificial vascular grafts, enhancing their function. This biomaterial strategy selectively supports endothelial cells over smooth muscle cells for improved graft performance.
Area of Science:
- Biomaterials Science
- Surface Chemistry
- Regenerative Medicine
Background:
- Improving the long-term patency of small-caliber artificial vascular grafts is crucial.
- Traditional hydrophilic polymer coatings can hinder endothelial cell adhesion and confluent lining formation.
Purpose of the Study:
- To develop a novel surface modification strategy for enhanced endothelialization of artificial vascular grafts.
- To create a cell-selective coating that promotes endothelial cell (EC) adhesion and function over smooth muscle cells (SMCs).
Main Methods:
- Fabrication of a rational-designed triblock functional protein (cofp-MZY/R) incorporating mussel-inspired, zwitterionic, and bioactive peptide domains (YIGSR, REDV).
- Coating of polytetrafluoroethylene (PTFE) vascular grafts with the triblock protein.
- Evaluation of protein coating characteristics, biocompatibility (cytotoxicity, hemolysis), and cellular behavior (adhesion, proliferation, migration) of ECs and SMCs.
Main Results:
- The triblock protein facilely coated the PTFE surface, exhibiting moderate resistance to non-specific protein and platelet adsorption.
- The coating demonstrated excellent biocompatibility and selectively promoted EC adhesion, proliferation, and migration while inhibiting SMCs.
- The mussel-inspired domain facilitated in vivo Dopa formation for robust surface functionalization.
Conclusions:
- The mussel-inspired triblock functional protein coating presents a promising strategy for the endothelialization of artificial vascular grafts.
- This approach offers improved cell selectivity, enhancing the potential for successful vascular graft applications.
