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Citric acid functionalized nitinol stent surface promotes endothelial cell healing
Author(s) -
Ceresnakova Miriama,
Murray David,
McGourty Kieran D.,
Butler James,
Neilan John,
Soulimane Tewfik,
Hudson Sarah P.
Publication year - 2021
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.37150
Subject(s) - restenosis , materials science , stent , biocompatibility , paclitaxel , cell adhesion , surface modification , biomedical engineering , cell growth , integrin , adhesion , cell , medicine , surgery , chemistry , biochemistry , composite material , metallurgy , chemotherapy
While drug‐eluting stents containing anti‐proliferative agents inhibit proliferation of smooth muscle cells (SMCs), they also delay the regrowth of the endothelial cells which can result in subsequent development of restenosis. Acidic extracellular environments promote cell anchorage and migration by inducing conformational change in integrins, the main cell adhesion proteins. This study addresses the feasibility of a citric acid (CA) functionalized nitinol stent for improving vascular biocompatibility, specifically enhancing endothelialization. CA functionalized nitinol vascular stents are compared to commercial bare metal (Zilver Flex) and paclitaxel eluting stents (Zilver PTX) in terms of re‐endothelialization. To study the effect of stent coatings, a stent conditioned media methodology was developed in an attempt to represent in vivo conditions. Overall, distinct advantages of the CA functionalized nitinol stent over commercial Zilver PTX DES and Zilver Flex BMS stents in terms of endothelial cell adhesion, migration, and proliferation are reported. These novel findings indicate the potential of a CA functionalized stent to serve as a bioactive and therapeutic surface for re‐endothelialization, perhaps in combination with a SMC proliferation inhibitor coating, to prevent restenosis.