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Compositions Including Synthetic and Natural Blends for Integration and Structural Integrity: Engineered for Different Vascular Graft Applications
Advanced Healthcare Materials ( IF 10.0 ) Pub Date : 2017-03-29 , DOI: 10.1002/adhm.201700001
Mozhgan Shojaee 1 , Chris A. Bashur 1
Affiliation  

Tissue engineering approaches for small‐diameter arteries require a scaffold that simultaneously maintains patency by preventing thrombosis and intimal hyperplasia, maintains its structural integrity after grafting, and allows integration. While synthetic and extracellular matrix‐derived materials can provide some of these properties individually, developing a scaffold that provides the balanced properties needed for vascular graft survival in the clinic has been particularly challenging. After 30 years of research, there are now several scaffolds currently in clinical trials. However, these products are either being investigated for large‐diameter applications or they require pre‐seeding of endothelial cells. This progress report identifies important challenges unique to engineering vascular grafts for high pressure arteries less than 4 mm in diameter (e.g., coronary artery), and discusses limitations with the current usage of the term “small‐diameter.” Next, the composition and processing techniques used for generating tissue engineered vascular grafts (TEVGs) are discussed, with a focus on the benefits of blended materials. Other scaffolds for non‐tissue engineering approaches and stents are also briefly mentioned for comparison. Overall, this progress report discusses the importance of defining the most critical challenges for small diameter TEVGs, developing new scaffolds to provide these properties, and determining acceptable benchmarks for scaffold responses in the body.

中文翻译:

用于合成和结构完整性的包括合成和天然共混物的组合物:专为不同的血管移植应用而设计

小直径动脉的组织工程方法需要一种支架,该支架可通过防止血栓形成和内膜增生同时保持通畅,在移植后保持其结构完整性,并允许整合。尽管合成的和细胞外基质衍生的材料可以分别提供其中一些特性,但是开发一种能够提供临床中血管移植物存活所需的平衡特性的支架特别具有挑战性。经过30年的研究,目前有几种支架正在临床试验中。但是,这些产品或者正在针对大直径应用进行研究,或者需要预先植入内皮细胞。该进展报告指出了直径小于4 mm的高压动脉(例如冠状动脉)工程化血管移植所面临的重大挑战,并讨论了当前使用的“小直径”术语的局限性。接下来,将讨论用于生成组织工程血管移植物(TEVG)的成分和加工技术,重点是混合材料的好处。还简要提及了用于非组织工程方法的其他支架和支架,以进行比较。总的来说,该进展报告讨论了为小直径TEVG定义最关键的挑战,开发提供这些特性的新支架以及确定体内支架反应可接受的基准的重要性。并讨论了当前使用的“小直径”术语的局限性。接下来,将讨论用于生成组织工程血管移植物(TEVG)的成分和加工技术,重点是混合材料的好处。还简要提及了用于非组织工程方法的其他支架和支架,以进行比较。总的来说,该进展报告讨论了为小直径TEVG定义最关键的挑战,开发提供这些特性的新支架以及确定体内支架反应可接受的基准的重要性。并讨论了当前使用的“小直径”术语的局限性。接下来,将讨论用于生成组织工程血管移植物(TEVG)的成分和加工技术,重点是混合材料的好处。还简要提及了用于非组织工程方法的其他支架和支架,以进行比较。总的来说,该进展报告讨论了为小直径TEVG定义最关键的挑战,开发提供这些特性的新支架以及确定体内支架反应可接受的基准的重要性。还简要提及了用于非组织工程方法的其他支架和支架,以进行比较。总体而言,该进展报告讨论了为小直径TEVG定义最关键的挑战,开发提供这些特性的新支架以及确定体内支架反应可接受的基准的重要性。还简要提及了用于非组织工程方法的其他支架和支架,以进行比较。总的来说,该进展报告讨论了为小直径TEVG定义最关键的挑战,开发提供这些特性的新支架以及确定体内支架反应可接受的基准的重要性。
更新日期:2017-03-29
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