Passivated hydrogel interface: Armor against foreign body response and inflammation in small-diameter vascular grafts

IF 12.8 1区 医学 Q1 ENGINEERING, BIOMEDICAL
Mengxue Zhou , Zihao Wang , Mengyu Li , Qi Chen , Shengmin Zhang , Jianglin Wang
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引用次数: 0

Abstract

The development of small-diameter vascular grafts (SDVGs) still faces significant challenges, particularly in overcoming blockages within vessels. A key issue is the foreign-body response (FBR) triggered by the implants, which impairs the integration between grafts and native vessels. In this study, we applied an interfacial infiltration strategy to create a stable, hydrophilic, and passivated hydrogel coating on SDVGs. This coating effectively resisted FBR and improved integration between the grafts and host tissue. We also incorporated anthocyanins, an antioxidant, into the hydrogel network to mitigate oxidative stress and promote endothelialization. The hydrogel coating exhibited excellent stability, retaining its integrity during continuous flushing over 15 days. Anthocyanins were released in response to reactive oxygen species (ROS), reducing inflammation and enhancing vascularization in a mouse subcutaneous implantation model. In a rabbit carotid artery replacement model, the SDVGs exhibited rapid endothelialization, guided vascular remodeling, and inhibited calcification, showing strong potential for clinical application. This study presents a straightforward and effective approach to improve the patency rate, endothelialization, and anti-calcification properties of SDVGs by equipping them with a protective anti-FBR and anti-inflammation hydrogel layer.
钝化水凝胶界面:小直径血管移植物抗异物反应和炎症的盔甲。
小直径血管移植物的发展仍然面临着巨大的挑战,特别是在克服血管阻塞方面。一个关键的问题是由移植物引发的异物反应(FBR),它会损害移植物与原生血管之间的融合。在这项研究中,我们应用界面渗透策略在sdgs上创建了一种稳定、亲水性和钝化的水凝胶涂层。该涂层有效地抵抗了FBR,并改善了移植物与宿主组织之间的整合。我们还将花青素(一种抗氧化剂)加入到水凝胶网络中,以减轻氧化应激并促进内皮化。水凝胶涂层表现出优异的稳定性,在超过15天的连续冲洗中保持其完整性。在小鼠皮下植入模型中,花青素释放以响应活性氧(ROS),减少炎症并增强血管化。在兔颈动脉置换术模型中,sddg表现出快速内皮化、引导血管重构和抑制钙化的特点,具有很强的临床应用潜力。本研究提出了一种简单有效的方法,通过为sddg配备抗fbr和抗炎症的保护性水凝胶层来提高其通畅率、内皮化和抗钙化性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Biomaterials
Biomaterials 工程技术-材料科学:生物材料
CiteScore
26.00
自引率
2.90%
发文量
565
审稿时长
46 days
期刊介绍: Biomaterials is an international journal covering the science and clinical application of biomaterials. A biomaterial is now defined as a substance that has been engineered to take a form which, alone or as part of a complex system, is used to direct, by control of interactions with components of living systems, the course of any therapeutic or diagnostic procedure. It is the aim of the journal to provide a peer-reviewed forum for the publication of original papers and authoritative review and opinion papers dealing with the most important issues facing the use of biomaterials in clinical practice. The scope of the journal covers the wide range of physical, biological and chemical sciences that underpin the design of biomaterials and the clinical disciplines in which they are used. These sciences include polymer synthesis and characterization, drug and gene vector design, the biology of the host response, immunology and toxicology and self assembly at the nanoscale. Clinical applications include the therapies of medical technology and regenerative medicine in all clinical disciplines, and diagnostic systems that reply on innovative contrast and sensing agents. The journal is relevant to areas such as cancer diagnosis and therapy, implantable devices, drug delivery systems, gene vectors, bionanotechnology and tissue engineering.
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