title: Mussel inspired coating of a biocompatible cyclodextrin based polymer onto CoCr vascular stents.
abstract: During the past decade, drug-eluting stents (DES) have been widely used for the treatment of occlusive coronary artery diseases. They are supposed to reduce the incidence of early in-stent restenosis by the elution of highly hydrophobic antiproliferative drugs. Nevertheless, the absence of long-term activity of these devices is responsible for late acute thrombosis probably due to the delayed re-endothelialization of the arterial wall over the bare metallic stent struts. Thus, a new generation of DES with a sustained release of therapeutic agents is required to improve long-term results of these devices. In this article, we report an original functionalization of CoCr vascular devices with a hydrophilic, biocompatible and biodegradable cyclodextrins based polymer which acts as a reservoir for lipophilic drugs allowing the sustained release of antiproliferative drugs. In this setting, polydopamine (PDA), a strong adhesive biopolymer, was applied as a first coating layer onto the surface of the metallic CoCr device in order to promote the strong anchorage of a cyclodextrin polymer. This polymer was generated "in situ" from the methylated cyclodextrins and citric acid as a cross-linking agent through a polycondensation reaction. After optimization of the grafting process, the amount of cyclodextrin polymer coated onto the CoCr device was quantified by colorimetric titrations and the resulting film was characterized by scanning electron microscopy (SEM) investigations. The cytocompatibility of the resulting coated film was assessed by cell proliferation and vitality tests. Finally, the ability of this coated device to act as a drug-eluting system was evaluated with paclitaxel, a strong hydrophobic antiproliferative drug, a reference drug used in current vascular drug-eluting stents.
authors.affiliation: Université Lille Nord De France , 59044 Lille Cedex, France.
authors.forename: Jonathan
authors.initials: J
authors.lastname: Sobocinski
authors.forename: William
authors.initials: W
authors.lastname: Laure
authors.forename: Mariam
authors.initials: M
authors.lastname: Taha
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Courcot
authors.forename: Feng
authors.initials: F
authors.lastname: Chai
authors.forename: Nicolas
authors.initials: N
authors.lastname: Simon
authors.forename: Ahmed
authors.initials: A
authors.lastname: Addad
authors.forename: Bernard
authors.initials: B
authors.lastname: Martel
authors.forename: Stephan
authors.initials: S
authors.lastname: Haulon
authors.forename: Patrice
authors.initials: P
authors.lastname: Woisel
authors.forename: Nicolas
authors.initials: N
authors.lastname: Blanchemain
authors.forename: Joel
authors.initials: J
authors.lastname: Lyskawa
mesh_terms: D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry*; D049872:Bivalvia; D002482:Cellulose / Q000737:chemistry*; D002857:Chromium / Q000737:chemistry; D003035:Cobalt / Q000737:chemistry; D023903:Coronary Restenosis / Q000628:therapy*; D003505:Cyclodextrins / Q000737:chemistry*; D016503:Drug Delivery Systems; D054855:Drug-Eluting Stents; D006801:Humans; D055806:Microvessels / Q000187:drug effects / Q000601:surgery*; D017239:Paclitaxel / Q000737:chemistry / Q000494:pharmacology
chemical_list: D001672:Biocompatible Materials; D003505:Cyclodextrins; C041953:cyclodextrin polymer; D002857:Chromium; D003035:Cobalt; D002482:Cellulose; D017239:Paclitaxel