中国神经再生研究(英文版) ›› 2015, Vol. 10 ›› Issue (6): 904-908.doi: 10.4103/1673-5374.158354

• 原著:神经损伤修复保护与再生 • 上一篇    下一篇

脑缺血后12h尾静脉注射骨髓间充质干细胞为保护脑缺血的最佳时机

  

  • 收稿日期:2015-03-06 出版日期:2015-06-18 发布日期:2015-06-18

12 hours after cerebral ischemia is the optimal time for bone marrow mesenchymal stem cell transplantation

Seyed Mojtaba Hosseini 1, 2, 3,  Mohammad Farahmandnia 1, 2, Zahra Razi 1, 2, Somayeh Delavarifar 1, 2, Benafsheh Shakibajahromi 1, 2   

  1. 1 Student Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran
    2 Cell and Molecular Medicine Student Research Group, Medical School, Shiraz university of Medical Sciences, Shiraz, Iran
    3 Stem Cell Laboratory, Department of Anatomy, Shiraz University of Medical Sciences, Shiraz, Iran
  • Received:2015-03-06 Online:2015-06-18 Published:2015-06-18
  • Contact: Seyed Mojtaba Hosseini, M.D., hoseini2010m@gmail.com.

摘要:

以干细胞移植保护脑缺血已有报道,但何时移植、移植途径如何选择一直无公识。应用大脑中动脉阻塞法建立脑缺血大鼠模型,于脑缺血后1,12h,1,3,5,7d尾静脉注射骨髓间充质干细胞。脑缺血后28d应用6分制评分法和HE染色评估大鼠神经功能和缺血脑组织病理变化。荧光显微镜下观察PKH标记的骨髓间充质干细胞,以检测骨髓间充质干细胞的迁移情况。分光光度法检测Caspase-3活性。发现缺血后12h注射骨髓间充质干细胞的大鼠神经功能最佳,缺血脑组织病理损害最小,迁移至缺血周围脑组织的骨髓间充质干细胞最多,缺血脑组织Caspase-3活性最低。实验结果证明,脑缺血后12h静脉注射骨髓间充质干细胞是干预脑缺血的最佳时间点,其产生的神经保护作用最强。

关键词: 神经再生, 骨髓间充质干细胞, 脑缺血, 大脑中动脉阻塞, 尾静脉注射, 细胞疗法, 神经保护

Abstract:

Cell therapy using stem cell transplantation against cerebral ischemia has been reported. However, it remains controversial regarding the optimal time for cell transplantation and the transplantation route. Rat models of cerebral ischemia were established by occlusion of the middle cerebral artery. At 1, 12 hours, 1, 3, 5 and 7 days after cerebral ischemia, bone marrow mesenchymal stem cells were injected via the tail vein. At 28 days after cerebral ischemia, rat neurological function was evaluated using a 6-point grading scale and the pathological change of ischemic cerebral tissue was observed by hematoxylin-eosin staining. Under the fluorescence microscope, the migration of bone marrow mesenchymal stem cells was examined by PKH labeling. Caspase-3 activity was measured using spectrophotometry. The optimal neurological function recovery, lowest degree of ischemic cerebral damage, greatest number of bone marrow mesenchymal stem cells migrating to peri-ischemic area, and lowest caspase-3 activity in the ischemic cerebral tissue were observed in rats that underwent bone marrow mesenchymal stem cell transplantation at 12 hours after cerebral ischemia. These findings suggest that 12 hours after cerebral ischemia is the optimal time for tail vein injection of bone marrow mesenchymal stem cell transplantation against cerebral ischemia, and the strongest neuroprotective effect of this cell therapy appears at this time.

Key words: nerve regeneration, bone marrow mesenchymal stem cells, cerebral ischemia, tail vein injection, middle cerebral artery occlusion, cell therapy, neuroprotection