中国神经再生研究(英文版) ›› 2023, Vol. 18 ›› Issue (7): 1505-1511.doi: 10.4103/1673-5374.360241

• 原著:脊髓损伤修复保护与再生 • 上一篇    下一篇

富含基因的浓缩白细胞自体灌注对小型猪模型创伤脊髓重塑有积极的作用

  

  • 出版日期:2023-07-15 发布日期:2023-01-12
  • 基金资助:
    俄罗斯科学基金会(16-15-00010);喀山科学中心资金资助

Molecular and cellular changes in the post-traumatic spinal cord remodeling after autoinfusion of a genetically-enriched leucoconcentrate in a mini-pig model

Maria Aleksandrovna Davleeva1, Ravil Rasimovich Garifulin1, Farid Vagizovich Bashirov1, Andrei Aleksandrovich Izmailov1, #br# Leniz Faritovich Nurullin1, 2, Ilnur Ildusovich Salafutdinov1, 3, Dilara Zilbarovna Gatina3, Dmitrij Nikolaevich Shcherbinin4, #br# Andrei Aleksandrovich Lysenko4, Irina Leonidovna Tutykhina4, Maksim Mikhailovich Shmarov4, Rustem Robertovich Islamov1, *#br#   

  1. 1Department of Histology, Cytology and Embryology, Kazan State Medical University, Kazan, Russia; 2Кazan Institute of Biochemistry and Biophysics, Federal Research Center of Kazan Scientific Center of Russian Academy of Sciences, Kazan, Russia; 3Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Russia; 4The National Research Center for Epidemiology and Microbiology named after Honorary Academician N.F. Gamaleya of the Ministry of Health of the Russian Federation, Moscow, Russia
  • Online:2023-07-15 Published:2023-01-12
  • Contact: Rustem Robertovich Islamov, MD, Dr.Sci., rustem.islamov@gmail.com.
  • Supported by:
    This study was supported by a grant from the Russian Science Foundation, No. 16‐15‐00010 (to RRI). LFN was funded by government assignment for FRC Kazan Scientific Center of RAS. 

摘要:

创伤后的脊髓重塑包括退化和再生过程,这影响了脊髓损伤后功能恢复的有效性。脊髓损伤的基因治疗可以诱导神经组织重塑的积极变化。作者在其既往研究中,为了有治疗作用的基因传递至脊髓损伤部位,开发了一种新的方法,即使用携带重组cDNA的嵌合型腺病毒(Ad5/35)体外转导的自体浓缩白细胞。此次研究评估了同时产生重组血管内皮生长因子、胶质细胞源性神经营养因子和神经细胞粘附分子的遗传富集的浓缩白细胞静脉输注对中度脊髓损伤小型猪模型损伤脊髓组织重塑的分子和细胞变化的影响。实验根据损伤的中心点,对治疗动物的喙部和尾部的脊髓再生进行了形态学和免疫荧光分析,结果显示,自体灌注遗传富集的浓缩白细胞使脊髓损伤小型猪:(1)灰质完整度和脊髓细胞的存活率提高(Caspase-3阳性细胞数量减少,Hsp27的表达减少);(2)突触蛋白的表达恢复。(3)星形胶质增生减少(GFAP阳性星形胶质细胞和Iba1阳性小胶质细胞的面积减少);(4) βIII-管蛋白阳性轴突的再生率提高,同时侧皮质脊髓束区域的Olig2阳性少突胶质细胞数量增加。这些结果显示,静脉输注产生重组血管内皮生长因子、胶质细胞源性神经营养因子和神经细胞粘附分子的自体富集浓缩白细胞对创伤后重塑脊髓神经组织的分子和细胞学水平有积极作用。这些数据为脊髓损伤的新基因治疗方法应用提供了一个坚实的实验基础。

https://orcid.org/0000-0002-6632-4636 (Rustem Robertovich Islamov)

Abstract: Post-traumatic spinal cord remodeling includes both degenerating and regenerating processes, which affect the potency of the functional recovery after spinal cord injury (SCI). Gene therapy for spinal cord injury is proposed as a promising therapeutic strategy to induce positive changes in remodeling of the affected neural tissue. In our previous studies for delivering the therapeutic genes at the site of spinal cord injury, we developed a new approach using an autologous leucoconcentrate transduced ex vivo with chimeric adenoviruses (Ad5/35) carrying recombinant cDNA. In the present study, the efficacy of the intravenous infusion of an autologous genetically-enriched leucoconcentrate simultaneously producing recombinant vascular endothelial growth factor (VEGF), glial cell line-derived neurotrophic factor (GDNF), and neural cell adhesion molecule (NCAM) was evaluated with regard to the molecular and cellular changes in remodeling of the spinal cord tissue at the site of damage in a model of mini-pigs with moderate spinal cord injury. Experimental animals were randomly divided into two groups of 4 pigs each: the therapeutic (infused with the leucoconcentrate simultaneously transduced with a combination of the three chimeric adenoviral vectors Ad5/35‐VEGF165, Ad5/35‐GDNF, and Ad5/35‐NCAM1) and control groups (infused with intact leucoconcentrate). The morphometric and immunofluorescence analysis of the spinal cord regeneration in the rostral and caudal segments according to the epicenter of the injury in the treated animals compared to the control mini-pigs showed: (1) higher sparing of the grey matter and increased survivability of the spinal cord cells (lower number of Caspase-3-positive cells and decreased expression of Hsp27); (2) recovery of synaptophysin expression; (3) prevention of astrogliosis (lower area of glial fibrillary acidic protein-positive astrocytes and ionized calcium binding adaptor molecule 1-positive microglial cells); (4) higher growth rates of regenerating βIII-tubulin-positive axons accompanied by a higher number of oligodendrocyte transcription factor 2-positive oligodendroglial cells in the lateral corticospinal tract region. These results revealed the efficacy of intravenous infusion of the autologous genetically-enriched leucoconcentrate producing recombinant VEGF, GDNF, and NCAM in the acute phase of spinal cord injury on the positive changes in the post-traumatic remodeling nervous tissue at the site of direct injury. Our data provide a solid platform for a new ex vivo gene therapy for spinal cord injury and will facilitate further translation of regenerative therapies in clinical neurology.

Key words: autologous genetically-enriched leucoconcentrate, chimeric adenoviral vector, gene therapy, glial cell line‐derived neurotrophic factor, mini-pig, neural cell adhesion molecule, spinal cord contusion injury, vascular endothelial growth factor