Surface modification of
biomaterials for rapid endothelialization is a promising approach for improving long-term patency of artificial vascular grafts (e.g.
polytetrafluoroethylene,
PTFE) with small-caliber vascular (<6 mm). However, surfaces modified with traditional strategies using hydrophilic
polymers may be excessively hydrophilic to limit endothelial cell adhesion and formation of confluent endothelial lining. In this study, a triblock functional
protein cofp-MZY/R was fabricated with cell selectivity of endothelial cells (ECs) over smooth muscle cells (SMCs) for endothelialization on
PTFE. This rational designed triblock
protein consisted of mussel-inspired domain, zwitterionic
polypeptide and bioactive
peptides (
YIGSR and REDV), in which
Dopa was efficiently obtained with residue-specificity in vivo. The triblock
protein could facilely form coating on
PTFE surface and the resulting
protein coating exhibited moderate nonspecific resistance of
protein and platelets. Together with bioactive
peptides tail, it was available for cell attachment on surfaces. As
protein material, this coating displayed remarkable biocompatibility through cytotoxicity and
hemolysis measurements. Moreover, cellular behavior assay demonstrated that triblock
protein coating could selectively promote adhesion, proliferation and migration of ECs rather than SMCs. This mussel-inspired triblock functional
protein coating indicated a promising strategy for endothelialization of artificial vascular grafts.