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A novel glycyrrhizin acid-coated stent reduces neointimal formation in a rabbit iliac artery model.

Authors :
Shuai Teng
Zhaowei Zhu
Yang Li
Xinqun Hu
Zhenfei Fang
Zhenjiang Liu
Shenghua Zhou
Source :
Frontiers in Pharmacology; 2023, p01-09, 9p
Publication Year :
2023

Abstract

Introduction: Most drug-eluting stents (DESs) inhibit intimal hyperplasia but impair re-endothelialization. This study aimed to evaluate in vivo strut coverage and neointimal growth in a new glycyrrhizin acid (GA)-eluting stent. Methods: New Zealand White rabbits (n = 20) with atherosclerotic plaques were randomly divided into three groups based on implanted iliac artery stents: baremetal stents (BMSs), rapamycin-eluting stents, and GA-eluting stents. After the in vivo intravascular ultrasound (IVUS) assessment at 28 days, the vessels were harvested for scanning electron microscopy (SEM) and histology. After 4 weeks of follow-up, the stent and external elastic lamina (EEL) areas were compared among the groups. Results: The rapamycin- or GA-eluting stents significantly reduced the neointimal area compared with BMSs, though GA-eluting stents had the lowest reduction. There were more uncovered struts for rapamycin-eluting stents than those for GA-eluting stents and bare-metal stents. The endothelial nitric oxide synthase (eNOS) expression in GA-eluting stents was much higher than that in BMSs and rapamycin-eluting stents, even though the endothelial coverage between struts was equivalent between BMSs and GA-eluting stents. Moreover, GA-eluting stents markedly promoted re-endothelialization and improved arterial healing compared to rapamycin-eluting stents in a rabbit atherosclerotic model. Conclusion: In conclusion, the novel GA-coated stent used in this study inhibited intimal hyperplasia and promoted re-endothelialization. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
16639812
Database :
Complementary Index
Journal :
Frontiers in Pharmacology
Publication Type :
Academic Journal
Accession number :
164073252
Full Text :
https://doi.org/10.3389/fphar.2023.1159779