中国神经再生研究(英文版) ›› 2017, Vol. 12 ›› Issue (12): 2050-2058.doi: 10.4103/1673-5374.221163

• 原著:脊髓损伤修复保护与再生 • 上一篇    下一篇

维生素C可增强骨髓间充质干细胞修复脊髓损伤的神经保护作用?

  

  • 收稿日期:2017-10-10 出版日期:2017-12-15 发布日期:2017-12-15
  • 基金资助:

    埃及Banha大学管理部门项目

Does vitamin C have the ability to augment the therapeutic effect of bone marrow-derived mesenchymal stem cells on spinal cord injury?

Nesrine Salem1, Mohamed Y. Salem1, Mohammed M. Elmaghrabi2, Moataz A. Elawady2, Mona A. Elawady3, Dina Sabry4,Ashraf Shamaa5, Abdel-Haleem H. Elkasapy6, Noha Ibrhim7, Azza Elamir8   

  1. 1 Department of Histology and Cell Biology, Faculty of Medicine, Banha University, Banha, Egypt
    2 Department of Neurosurgery, Faculty of Medicine, Banha University, Banha, Egypt
    3 Department of Community Medicine, Faculty of Medicine, Banha University, Banha, Egypt
    4 Department of Medical Biochemistry, Faculty of Medicine, Cairo University, Giza, Egypt
    5 Department of Surgery and Radiology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
    6 Department of Surgery, Faculty of Veterinary Medicine, Banha University, Banha, Egypt
    7 Department of Medical Physiology, Faculty of Medicine, Banha University, Banha, Egypt
    8 Department of Medical Biochemistry, Faculty of Medicine, El Fayoum University, Egyptian, Egypt
  • Received:2017-10-10 Online:2017-12-15 Published:2017-12-15
  • Contact: Dina Sabry, M.D.,dinasabry@kasralainy.edu.eg.
  • Supported by:

    This work was funded by Project Management Unit, Banha University, Banha, Egypt.

摘要:

甲基强的松龙是目前唯一被证实对急性创伤性脊髓损伤有明确神经保护作用的药物;维生素C是天然水溶性抗氧化剂,可消除自由基对神经细胞的损害,从而起到神经保护作用;骨髓间充质干细胞作为一种多能干细胞,在修复脊髓损伤方面显示出良好的应用前景。为评估甲基强的松龙、维生素C、骨髓间充质干细胞治疗创伤性脊髓损伤的效果,实验将80只成年雄性大鼠随机分为7组:对照组,脊髓损伤组(应用自由落体重物打击法建立脊髓损伤模型),甲基强的松龙组(造模后,每隔6h尾静脉注射30 mg/kg 甲基强的松龙,共5次),维生素C组(造模后,每天腹腔注射100 mg/kg维生素C,共28d),甲基强的松龙+维生素C组(造模后,给予同前的甲基强的松龙和维生素C干预),骨髓间充质干细胞组(造模后,脊髓损伤部位局部注射3 × 106 个骨髓间充质干细胞)和骨髓间充质干细胞+维生素C组(造模后,给予同前的骨髓间充质干细胞和维生素C干预)。应用Basso量表评估脊髓损伤后28d内大鼠运动功能恢复情况。干预结束后,对损伤脊髓组织进行HE染色和免疫组化染色,以观察其神经细胞损伤情况;以实时PCR定量检测损伤脊髓组织中转化生长因子β, 肿瘤坏死因子α和基质金属蛋白酶2基因表达。骨髓间充质干细胞干预在促进脊髓损伤大鼠神经功能恢复、减轻神经细胞损害、降低转化生长因子β, 肿瘤坏死因子α和基质金属蛋白酶2基因表达方面较甲基强的松龙和/或维生素C干预作用明显;更为重要的是,骨髓间充质干细胞联合维生素C干预后,前述表现更为明显。说明维生素C可增强骨髓间充质干细胞对脊髓损伤的神经保护作用。

orcid:0000-0002-6720-3385(Dina Sabry)

 

关键词: 神经再生, 脊髓损伤, 维生素C, 甲基强的松龙, 骨髓间充质干细胞, 运动功能

Abstract:

Methylprednisolone (MP) is currently the only drug confirmed to exhibit a neuroprotective effect on acute spinal cord injury (SCI). Vitamin C (VC) is a natural water-soluble antioxidant that exerts neuroprotective effects through eliminating free radical damage to nerve cells. Bone marrow mesenchymal stem cells (BMMSCs), as multipotent stem cells, are promising candidates in SCI repair. To evaluate the therapeutic effects of MP, VC and BMMSCs on traumatic SCI, 80 adult male rats were randomly divided into seven groups: control, SCI (SCI induction by weight-drop method), MP (SCI induction, followed by administration of 30 mg/kg MP via the tail vein, once every other 6 hours, for five times), VC (SCI induction, followed by intraperitoneal administration of 100 mg/kg VC once a day, for 28 days), MP + VC (SCI induction, followed by administration of MP and VC as the former), BMMSCs (SCI induction, followed by injection of 3×106 BMMSCs at the injury site), and BMMSCs + VC (SCI induction, followed by BMMSCs injection and VC administration as the former). Locomotor recovery was assessed using the Basso Mouse Scale. Injured spinal cord tissue was evaluated using hematoxylin-eosin staining and immunohistochemical staining. Expression of transforming growth factor-beta, tumor necrosis factor-alpha, and matrix metalloproteinase-2 genes was determined using real-time quantitative PCR. BMMSCs intervention better promoted recovery of nerve function of rats with SCI, mitigated nerve cell damage, and decreased expression of transforming growth factor-beta, tumor necrosis factor-alpha, and matrix metalloproteinase-2 genes than MP and/or VC. More importantly, BMMSCs in combination with VC induced more obvious improvements. These results suggest that VC can enhance the neuroprotective effects of BMMSCs against SCI.

Key words: nerve regeneration, spinal cord injury, vitamin C, methylprednisolone, bone marrow mesenchymal stem cells, locotmotor, neural regeneration