中国神经再生研究(英文版) ›› 2016, Vol. 11 ›› Issue (2): 298-304.doi: 10.4103/1673-5374.177739

• 原著:脑损伤修复保护与再生 • 上一篇    下一篇

神经干细胞移植治疗脑卒中的潜力?

  

  • 收稿日期:2015-12-22 出版日期:2016-02-15 发布日期:2016-02-15
  • 基金资助:

    韩国健康与福利部卫生技术R&D项目 (HI12C0381)

Human neural stem cells promote proliferation of endogenous neural stem cells and enhance angiogenesis in ischemic rat brain

Sun Ryu 1, 4, Seung-Hoon Lee 1, 4, Seung U. Kim 2, 3, Byung-Woo Yoon 1, 4   

  1. 1 Department of Neurology and Clinical Research Institute, Seoul National University Hospital, Seoul National University, Seoul, Republic of Korea
    2 Medical Research Institute, Chung-Ang University School of Medicine, Seoul, Republic of Korea
    3 Department of Neurology, UBC Hospital, University of British Columbia, Vancouver, Canada
    4 Medical Research Center, Seoul National University, Seoul, Republic of Korea
  • Received:2015-12-22 Online:2016-02-15 Published:2016-02-15
  • Contact: Byung-Woo Yoon, M.D., Ph.D., bwyoon@snu.ac.kr.
  • Supported by:

    This work was supported by the Korea Health Technology R&D Project, Ministry of Health & Welfare (HI12C0381), Republic of Korea.

摘要:

以往研究表明,人神经干细胞移植于啮齿动物齿状回或脑室可促进内源性神经干细胞的神经发生作用。为验证人神经干细胞移植于脑室下区是否可促进脑缺血大鼠内源性神经发生和血管生成,实验应用大脑中动脉阻塞法建立局灶性脑缺血大鼠模型后,于脑室下区移植人神经干细胞。发现人神经干细胞移植可明显改善脑缺血大鼠行为障碍,缩小脑梗死体积。大量移植的人神经干细胞存活并主要分布在缺血侧大脑半球。脑室下区和海马BrdU阳性的内源性神经干细胞,分化为神经元标志物NeuN和星形胶质细胞标志物胶质纤维酸性蛋白免疫阳性细胞。缺血脑组织边缘BrdU+/vWF+增殖的内皮细胞数量明显增高。说明人神经干细胞脑室下区移植同样可促进局灶性脑缺血大鼠大脑内源性神经干细胞增殖,并分化为成熟神经元样细胞,同时增强血管生成。

关键词: 神经再生, 局灶性脑缺血, 大脑中动脉阻塞, 人神经干细胞, 移植, 分化, 脑梗死, 行为, 内源性神经发生, 血管生成

Abstract:

Transplantation of human neural stem cells into the dentate gyrus or ventricle of rodents has been reportedly to enhance neurogenesis. In this study, we examined endogenous stem cell proliferation and angiogenesis in the ischemic rat brain after the transplantation of human neural stem cells. Focal cerebral ischemia in the rat brain was induced by middle cerebral artery occlusion. Human neural stem cells were transplanted into the subventricular zone. The behavioral performance of human neural stem cells-treated ischemic rats was significantly improved and cerebral infarct volumes were reduced compared to those in untreated animals. Numerous transplanted human neural stem cells were alive and preferentially localized to the ipsilateral ischemic hemisphere. Furthermore, 5-bromo-2′-deoxyuridine-labeled endogenous neural stem cells were observed in the subventricular zone and hippocampus, where they differentiated into cells immunoreactive for the neural markers doublecortin, neuronal nuclear antigen NeuN, and astrocyte marker glial fibrillary acidic protein in human neural stem cells-treated rats, but not in the untreated ischemic animals. The number of 5-bromo-2′-deoxyuridine-positive ⁄ anti-von Willebrand factor-positive proliferating endothelial cells was higher in the ischemic boundary zone of human neural stem cells-treated rats than in controls. Finally, transplantation of human neural stem cells in the brains of rats with focal cerebral ischemia promoted the proliferation of endogenous neural stem cells and their differentiation into mature neural-like cells, and enhanced angiogenesis. This study provides valuable insights into the effect of human neural stem cell transplantation on focal cerebral ischemia, which can be applied to the development of an effective therapy for stroke.

Key words: nerve regeneration, focal cerebral ischemia, middle cerebral artery occlusion, human neural stem cells, transplantation, differentiation, infarct size, behavioral analysis, endogenous neurogenesis, angiogenesis, rats, neural regeneration