title: Development of a Polyester Coating Combining Antithrombogenic and Cell Adhesive Properties: Influence of Sequence and Surface Density of Adhesion Peptides.
abstract: Biofunctionalization strategies have been developed to improve small-diameter vascular grafts. However, a fully successful coating featuring antithrombogenic properties while allowing for endothelialization has not been achieved yet. In this report, we explored the combination of low-fouling polyethylene glycol (PEG) and adhesion peptides, namely, RGD, YIGSR, and REDV, grafted on top of polyvinylamine (PVAm)-coated polyester. The peptides were grafted over a wide range of density (ca. 20-2000 pmol/cm(2)) on top of a dense PEG underlayer. The coating performances were assessed through HUVEC adhesion, platelet attachment, and protein adsorption, which were all drastically diminished on PEG-coated samples. RGD exhibited the expected high adhesive properties, toward both HUVEC and platelets. REDV had no effect neither on platelet attachment, as expected, nor on HUVEC adhesion, in contrast with previous reports. YIGSR was the most promising sequence even though its combination with other agents should be explored to further decrease thrombogenicity for vascular graft applications.
authors: †Department of Chemical Engineering, Groupe de Recherche en Sciences et Technologies Biomédicales, Bio-P2 Research Unit, École Polytechnique de Montréal, P.O. Box 6079, succ. Centre-Ville, Montréal (QC), Canada H3C 3A7.
authors: Samantha
authors: S
authors: Noel
authors: ‡Université de Montréal, Montreal Heart Institute, 5000 Belanger Est, Montréal (QC), Canada H1T 1C8.
authors: Ahmed
authors: A
authors: Hachem
authors: ‡Université de Montréal, Montreal Heart Institute, 5000 Belanger Est, Montréal (QC), Canada H1T 1C8.
authors: Yahye
authors: Y
authors: Merhi
authors: †Department of Chemical Engineering, Groupe de Recherche en Sciences et Technologies Biomédicales, Bio-P2 Research Unit, École Polytechnique de Montréal, P.O. Box 6079, succ. Centre-Ville, Montréal (QC), Canada H3C 3A7.
authors: Gregory
authors: G
authors: De Crescenzo
mesh_terms: D001792:Blood Platelets / Q000187:drug effects; D002448:Cell Adhesion; D005343:Fibrinolytic Agents / Q000737:chemistry* / Q000494:pharmacology; D061307:Human Umbilical Vein Endothelial Cells / Q000187:drug effects; D006801:Humans; D009842:Oligopeptides / Q000737:chemistry* / Q000494:pharmacology; D011091:Polyesters / Q000737:chemistry*; D011092:Polyethylene Glycols / Q000737:chemistry; D011145:Polyvinyls / Q000737:chemistry
chemical_list: D005343:Fibrinolytic Agents; D009842:Oligopeptides; D011091:Polyesters; D011145:Polyvinyls; C081571:tyrosyl-isoleucyl-glycyl-seryl-arginine; D011092:Polyethylene Glycols; C047981:arginyl-glycyl-aspartic acid