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An Asymmetrical Dual Coating on the Stent Prepared by Ultrasonic Atomization

Lookup NU author(s): Ruolan Du, Dr Tieying Yin, Dr Natalie Wang, Dr Jinju Chen, Dr G Wang

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This is the authors' accepted manuscript of an article that has been published in its final definitive form by John Wiley & Sons, Inc., 2019.

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Abstract

This study aims to design an asymmetric dual coating (ADC) on the stent by ultrasonic atomization to solve the problem of delayed endothelialization and late or very late stent thrombosis which caused by drug eluting stent (DES) with symmetric coating. Chitosan loaded monoclonal platelet glycoprotein IIIa receptor antibody SZ-21 coating (CSC) was sprayed on inner surface of stents, and outer surface was sprayed CSC and poly(lactic-co-glycolic acid) (PLGA) loaded with docetaxel (DTX) coating (PDC). The coated surface was uniform without aggregation and no shedding phenomenon either before or after stent expanded. Fluorescence labeling has confirmed that the coating has an asymmetric structure. The cumulative release for SZ-21 and DTX was 40.11 % and 27.22 % within first 24 h, then DTX became the major released drug from 24 h to 7 d, after released for 28 d about 40% of the SZ-21 and 50% DTX still remained on the coated stent. It achieved that ADC can inhibit thrombosis at earlier period and inhibit vascular smooth muscle cells (VSMCs) proliferation at later period. And that ADC has good hemocompatibility and can significantly inhibit VSMCs proliferation. Finally, 4 and 12 weeks after the stent with ADC implanted into rabbit carotid arteries, it showed that the stent with ADC was safe and could effectively prevent thrombosis and in-stent restenosis.

Publication metadata

Author(s): Wang J, Ren Y, Huang Y, Du R, Xi Y, Yin T, Wang Y, Zhang D, Chen J, Wang G

Publication type: Article

Publication status: Published

Journal: Journal of Biomedical Materials Research Part B: Applied Biomaterials

Year: 2019

Volume: 107

Issue: 3

Pages: 825-837

Print publication date: 01/04/2019

Online publication date: 08/10/2018

Acceptance date: 28/05/2018

Date deposited: 09/10/2018

ISSN (print): 1552-4973

ISSN (electronic): 1552-4981

Publisher: John Wiley & Sons, Inc.

URL: https://doi.org/10.1002/jbm.b.34179

DOI: 10.1002/jbm.b.34179

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