Biomimetic engineering endothelium-like coating on cardiovascular stent through heparin and nitric oxide-generating compound synergistic modification strategy.

Abstract

Co-immobilization of two or more molecules with different and complementary functions to prevent thrombosis, suppress smooth muscle cell (SMC) proliferation, and support endothelial cell (EC) growth is generally considered to be promising for the re-endothelialization on cardiovascular stents. However, integration of molecules with distinct therapeutic effects does not necessarily result in synergistic physiological functions due to the lack of interactions among them, limiting their practical efficacy. Herein, we apply heparin and nitric oxide (NO), two key molecules of the physiological functions of endothelium, to develop an endothelium-mimetic coating. Such coating is achieved by sequential conjugation of heparin and the NO-generating compound selenocystamine (SeCA) on an amine-bearing film of plasma polymerized allylamine. The resulting surface combines the anti-coagulant (anti-FXa) function provided by the heparin and the anti-platelet activity of the catalytically produced NO. It also endows the stents with the ability to simultaneously up-regulate α-smooth muscle actin (α-SMA) expression and to increase cyclic guanylate monophosphate (cGMP) synthesis of SMC, thereby significantly promoting their contractile phenotype and suppressing their proliferation. Importantly, this endothelium-biomimetic coating creates a favorable microenvironment for EC over SMC. These features impressively improve the antithrombogenicity, re-endothelialization and anti-restenosis of vascular stents in vivo.

• Authors: Hua Qiu, Pengkai Qi, Jingxia Liu, Ying Yang, Xing Tan, Yu Xiao, Manfred F Maitz, Nan Huang, Zhilu Yang
• Journal: Biomaterials (Biomaterials) Vol. 207 Pg. 10-22 (07 2019) ISSN: 1878-5905 [Electronic] Netherlands
• PMID: 30947118 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2019 Elsevier Ltd. All rights reserved.

Chemical References

• ACTA2 protein, human
• Actins
• Coated Materials, Biocompatible
• Organoselenium Compounds
• selenocystamine
• Nitric Oxide
• Heparin
• Cystamine

Topics

• Actins (metabolism)
• Animals
• Bioengineering (methods)
• Biomimetics (methods)
• Cell Line
• Cell Proliferation (drug effects)
• Coated Materials, Biocompatible (chemistry, therapeutic use)
• Cystamine (analogs & derivatives, chemistry)
• Drug-Eluting Stents
• Heparin (chemistry)
• Human Umbilical Vein Endothelial Cells
• Humans
• Nitric Oxide (chemistry)
• Organoselenium Compounds (chemistry)
• Rabbits