Recent advances in cardiovascular stent for treatment of in-stent restenosis:Mechanisms and strategi

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Treatments of atherogenesis,one of the most common cardiovascular diseases (CVD),are continuously being made thanks to innovation and an increasingly in-depth knowledge of percutaneous transluminal coronary angioplasty (PTCA),the most revolutionary medical procedure used for vascular restoration.Combined with an expanding balloon,vascular stents used at stricture sites enable the long-time restora-tion of vascular permeability.However,complication after stenting,in-stent restenosis (ISR),hinders the advancement of vascular stents and are associated with high medical costs for patients for decades years.Thus,the development of a high biocompatibility stent with improved safety and efficiency is urgently needed.This review provides an overview of current advances and potential technologies for the modi-fication of stents for better treatment and prevention of ISR.In particular,the mechanisms of in-stent restenosis are investigated and summarized with the aim to comprehensively understanding the patho-genesis of stent complications.Then,according to different therapeutic functions,the current stent mod-ification strategies are reviewed,including polymeric drug eluting stents,biological friendly stents,pro-healing stents,and gene stents.Finally,the review provides an outlook of the challenges in the design of stents with optimal properties.Therefore,this review is a valuable and practical guideline for the devel-opment of cardiovascular stents.
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