中国神经再生研究(英文版) ›› 2025, Vol. 20 ›› Issue (8): 2311-2312.doi: 10.4103/NRR.NRR-D-23-01231

• 观点:脊髓损伤修复保护与再生 • 上一篇    下一篇

核苷修饰的信使核糖核酸脂质纳米粒子作为一种新的脊髓损伤修复递送平台

  

  • 出版日期:2025-08-15 发布日期:2024-12-13

Nucleoside modified mRNA-lipid nanoparticles as a new delivery platform for the repair of the injured spinal cord

Krisztián Pajer, Tamás Bellák, Antal Nógrádi*   

  1. Department of Anatomy, Histology and Embryology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
  • Online:2025-08-15 Published:2024-12-13
  • Contact: Antal Nógrádi, MD, PhD, DSc, nogradi.antal@med.u-szeged.hu.

摘要: https://orcid.org/0000-0002-0520-5350 (Antal Nógrádi)

Abstract: Spinal cord injury and treatment opportunities: The adult mammalian spinal cord has a very limited capacity for spontaneous regeneration due to various intrinsic molecular and cellular factors. Although the spinal cord neurons have the capacity to regenerate their axons, the expression of growth inhibitory factors, lack or suppression of proper guidance cues, and profound inflammatory responses do not permit successful regeneration (Khyeam et al., 2021). Injury to the spinal cord affects both the long and short ascending and descending pathways thus separating the lower spinal cord segments from the higher motor and sensory centers. The primary physical injury is followed by a cascade of events, called secondary injury. During this phase, inflammation, apoptosis of neuronal and glial cells, glutamate excitotoxicity, disruption of the blood–brain barrier, demyelination of axons, and reactive astrogliosis occur (Silva et al., 2014). Therefore, safe and effective treatments need to be developed to preserve and if possible, regenerate the injured propriospinal and supraspinal tracts and induce favorable changes in the microenvironment of the cord around the lesion. Current therapeutic strategies using stem or progenitor cells, growth factors, or gene therapy via various methods have been attractive approaches to promote neuroprotection and neural regeneration following spinal cord injury (SCI) (Teng, 2019). Out of these many therapeutic ways, stem cells prove to be effective, especially a few stem cell lines, which are able to adapt to the specific needs of the injured cord in order to facilitate neuroprotection and regeneration. Recent evidence suggests that these effective undifferentiated stem cells produce a socalled “lesion-induced secretome” within the cord following transplantation, and they do not need to integrate permanently into the cord to achieve their beneficial effects (Figure 1A; Pajer et al., 2019). However, in cases of other stem cell types, integration into the injured cord is necessary to achieve a therapeutic effect.