Rodriguez-Cabello Jose Carlos, Gonzalez De Torre Israel, González-Pérez Miguel, González-Pérez Fernando, Montequi Irene
BIOFORGE, University of Valladolid, Valladolid, Spain.
Center for Biomedical Research in the Network in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain.
Front Bioeng Biotechnol. 2021 Jul 16;9:652384. doi: 10.3389/fbioe.2021.652384. eCollection 2021.
Current cutting-edge strategies in biomaterials science are focused on mimicking the design of natural systems which, over millions of years, have evolved to exhibit extraordinary properties. Based on this premise, one of the most challenging tasks is to imitate the natural extracellular matrix (ECM), due to its ubiquitous character and its crucial role in tissue integrity. The anisotropic fibrillar architecture of the ECM has been reported to have a significant influence on cell behaviour and function. A new paradigm that pivots around the idea of incorporating biomechanical and biomolecular cues into the design of biomaterials and systems for biomedical applications has emerged in recent years. Indeed, current trends in materials science address the development of innovative biomaterials that include the dynamics, biochemistry and structural features of the native ECM. In this context, one of the most actively studied biomaterials for tissue engineering and regenerative medicine applications are nanofiber-based scaffolds. Herein we provide a broad overview of the current status, challenges, manufacturing methods and applications of nanofibers based on elastin-based materials. Starting from an introduction to elastin as an inspiring fibrous protein, as well as to the natural and synthetic elastin-based biomaterials employed to meet the challenge of developing ECM-mimicking nanofibrous-based scaffolds, this review will follow with a description of the leading strategies currently employed in nanofibrous systems production, which in the case of elastin-based materials are mainly focused on supramolecular self-assembly mechanisms and the use of advanced manufacturing technologies. Thus, we will explore the tendency of elastin-based materials to form intrinsic fibers, and the self-assembly mechanisms involved. We will describe the function and self-assembly mechanisms of silk-like motifs, antimicrobial peptides and leucine zippers when incorporated into the backbone of the elastin-based biomaterial. Advanced polymer-processing technologies, such as electrospinning and additive manufacturing, as well as their specific features, will be presented and reviewed for the specific case of elastin-based nanofiber manufacture. Finally, we will present our perspectives and outlook on the current challenges facing the development of nanofibrous ECM-mimicking scaffolds based on elastin and elastin-like biomaterials, as well as future trends in nanofabrication and applications.
生物材料科学领域当前的前沿策略聚焦于模仿自然系统的设计,历经数百万年的演化,自然系统展现出非凡的特性。基于这一前提,最具挑战性的任务之一是模仿天然细胞外基质(ECM),因其普遍存在的特性及其在组织完整性中的关键作用。据报道,ECM的各向异性纤维结构对细胞行为和功能有重大影响。近年来,围绕将生物力学和生物分子线索纳入生物医学应用的生物材料及系统设计这一理念,出现了一种新的范式。事实上,材料科学的当前趋势涉及开发创新生物材料,这些材料包含天然ECM的动力学、生物化学和结构特征。在此背景下,用于组织工程和再生医学应用的最受积极研究的生物材料之一是基于纳米纤维的支架。本文提供了基于弹性蛋白材料的纳米纤维的当前状况、挑战、制造方法及应用的广泛概述。从介绍弹性蛋白作为一种具有启发性的纤维蛋白,以及用于应对开发模仿ECM的纳米纤维支架挑战的天然和合成弹性蛋白基生物材料开始,本综述将接着描述目前在纳米纤维系统生产中采用的主要策略,就弹性蛋白基材料而言,这些策略主要集中在超分子自组装机制和先进制造技术的应用。因此,我们将探讨弹性蛋白基材料形成固有纤维的趋势以及所涉及的自组装机制。我们将描述丝样基序、抗菌肽和亮氨酸拉链在并入弹性蛋白基生物材料主链时的功能和自组装机制。先进的聚合物加工技术,如静电纺丝和增材制造,以及它们的特定特征,将针对弹性蛋白基纳米纤维制造的具体情况进行介绍和综述。最后,我们将阐述基于弹性蛋白和类弹性蛋白生物材料开发模仿ECM的纳米纤维支架所面临的当前挑战的观点和展望,以及纳米制造和应用的未来趋势。
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