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体外微血管工程方法和策略用于间质组织整合。

In vitro microvascular engineering approaches and strategies for interstitial tissue integration.

机构信息

School of Chemical Engineering, Faculty of Engineering, Architecture and Information Technology, The University of Queensland, St Lucia, QLD 4100, Australia.

School of Chemical Engineering, Faculty of Engineering, Architecture and Information Technology, The University of Queensland, St Lucia, QLD 4100, Australia; Centre for Biomedical Technologies, School of Medical, Mechanical and Process Engineering, Faculty of Engineering, Queensland University of Technology, Kelvin Grove, QLD 4059, Australia.

出版信息

Acta Biomater. 2023 Nov;171:114-130. doi: 10.1016/j.actbio.2023.09.019. Epub 2023 Sep 17.

Abstract

The increasing gap between clinical demand for tissue or organ transplants and the availability of donated tissue highlights the emerging opportunities for lab-grown or synthetically engineered tissue. While the field of tissue engineering has existed for nearly half a century, its clinical translation remains unrealised, in part, due to a limited ability to engineer sufficient vascular supply into fabricated tissue, which is necessary to enable nutrient and waste exchange, prevent cellular necrosis, and support tissue proliferation. Techniques to develop anatomically relevant, functional vascular networks in vitro have made significant progress in the last decade, however, the challenge now remains as to how best incorporate these throughout dense parenchymal tissue-like structures to address diffusion-limited development and allow for the fabrication of large-scale vascularised tissue. This review explores advances made in the laboratory engineering of vasculature structures and summarises recent attempts to integrate vascular networks together with sophisticated in vitro avascular tissue and organ-like structures. STATEMENT OF SIGNIFICANCE: The ability to grow full scale, functional tissue and organs in vitro is primarily limited by an inability to adequately diffuse oxygen and nutrients throughout developing cellularised structures, which generally results from the absence of perfusable vessel networks. Techniques to engineering both perfusable vascular networks and avascular miniaturised organ-like structures have recently increased in complexity, sophistication, and physiological relevance. However, integrating these two essential elements into a single functioning vascularised tissue structure represents a significant spatial and temporal engineering challenge which is yet to be surmounted. Here, we explore a range of vessel morphogenic phenomena essential for tissue-vascular co-development, as well as evaluate a range of recent noteworthy approaches for generating vascularised tissue products in vitro.

摘要

临床对组织或器官移植的需求与捐赠组织的供应之间差距不断扩大,这凸显了实验室培养或合成工程组织的新兴机会。尽管组织工程领域已经存在了近半个世纪,但由于在构建的组织中工程化足够的血管供应的能力有限,其临床转化仍然没有实现,而这是实现营养物质和废物交换、防止细胞坏死和支持组织增殖所必需的。在过去十年中,开发体外具有解剖相关性和功能性血管网络的技术已经取得了重大进展,然而,现在的挑战仍然是如何最好地将这些技术整合到致密实质组织样结构中,以解决扩散受限的发展问题,并允许制造大规模的血管化组织。本文综述了实验室中血管结构工程方面的进展,并总结了最近将血管网络与复杂的体外无血管组织和器官样结构整合在一起的尝试。

意义声明

在体外生长全规模、功能组织和器官的能力主要受到无法在细胞化结构中充分扩散氧气和营养物质的限制,这通常是由于缺乏可灌注的血管网络所致。构建可灌注血管网络和无血管微型器官样结构的技术最近在复杂性、复杂性和生理相关性方面都有所提高。然而,将这两个基本要素整合到单个功能血管化组织结构中是一个具有重大空间和时间挑战性的工程难题,目前尚未得到解决。在这里,我们探讨了组织与血管共同发育所必需的一系列血管形态发生现象,并评估了最近在体外生成血管化组织产品的一系列值得注意的方法。

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