创伤性脊髓损伤再生方法的最新进展:材料视角
Recent Advances in the Regenerative Approaches for Traumatic Spinal Cord Injury: Materials Perspective.
作者信息
Abbas Walaa A, Ibrahim Maha E, El-Naggar Manar, Abass Wessam A, Abdullah Ibrahim H, Awad Basem I, Allam Nageh K
机构信息
Energy Materials Laboratory, School of Sciences and Engineering, The American University in Cairo, New Cairo 11835, Egypt.
Department of Physical Medicine, Rheumatology and Rehabilitation, Faculty of Medicine, Suez Canal University, Ismailia, Egypt.
出版信息
ACS Biomater Sci Eng. 2020 Dec 14;6(12):6490-6509. doi: 10.1021/acsbiomaterials.0c01074. Epub 2020 Nov 16.
Spinal cord injury (SCI) is a devastating health condition that may lead to permanent disabilities and death. Understanding the pathophysiological perspectives of traumatic SCI is essential to define mechanisms that can help in designing recovery strategies. Since central nervous system tissues are notorious for their deficient ability to heal, efforts have been made to identify solutions to aid in restoration of the spinal cord tissues and thus its function. The two main approaches proposed to address this issue are neuroprotection and neuro-regeneration. Neuroprotection involves administering drugs to restore the injured microenvironment to normal after SCI. As for the neuro-regeneration approach, it focuses on axonal sprouting for functional recovery of the injured neural tissues and damaged axons. Despite the progress made in the field, neural regeneration treatment after SCI is still unsatisfactory owing to the disorganized way of axonal growth and extension. Nanomedicine and tissue engineering are considered promising therapeutic approaches that enhance axonal growth and directionality through implanting or injecting of the biomaterial scaffolds. One of these recent approaches is nanofibrous scaffolds that are used to provide physical support to maintain directional axonal growth in the lesion site. Furthermore, these preferable tissue-engineered substrates can afford axonal regeneration by mimicking the extracellular matrix of the neural tissues in terms of biological, chemical, and architectural characteristics. In this review, we discuss the regenerative approach using nanofibrous scaffolds with a focus on their fabrication methods and their properties that define their functionality performed to heal the neural tissue efficiently.
脊髓损伤(SCI)是一种严重的健康状况,可能导致永久性残疾甚至死亡。了解创伤性脊髓损伤的病理生理学观点对于确定有助于设计恢复策略的机制至关重要。由于中枢神经系统组织的愈合能力众所周知地不足,人们一直在努力寻找有助于恢复脊髓组织及其功能的解决方案。为解决这一问题提出的两种主要方法是神经保护和神经再生。神经保护包括在脊髓损伤后使用药物将受损的微环境恢复到正常状态。至于神经再生方法,它专注于轴突发芽以实现受损神经组织和受损轴突的功能恢复。尽管该领域取得了进展,但由于轴突生长和延伸的无序方式,脊髓损伤后的神经再生治疗仍然不尽人意。纳米医学和组织工程被认为是有前途的治疗方法,通过植入或注射生物材料支架来促进轴突生长和定向性。这些最新方法之一是纳米纤维支架,用于提供物理支撑以维持损伤部位轴突的定向生长。此外,这些理想的组织工程基质可以通过在生物学、化学和结构特征方面模仿神经组织的细胞外基质来促进轴突再生。在这篇综述中,我们讨论了使用纳米纤维支架的再生方法,重点是它们的制造方法及其特性,这些特性决定了它们为有效治愈神经组织而发挥的功能。