中国神经再生研究(英文版) ›› 2017, Vol. 12 ›› Issue (3): 433-439.doi: 10.4103/1673-5374.202947

• 原著:脑损伤修复保护与再生 • 上一篇    下一篇

脑源性神经营养因子基因转染神经干细胞促进创伤性脑损伤部位神经元存活和细胞骨架蛋白表达

  

  • 收稿日期:2017-01-13 出版日期:2017-03-15 发布日期:2017-03-15
  • 基金资助:

    中国国家自然科学基金项目(31300812, 31371218

Neural stem cells over-expressing brain-derived neurotrophic factor promote neuronal survival and cytoskeletal protein expression in traumatic brain injury sites

Tao Chen1, Yan Yu2, Liu-jiu Tang2, Li Kong2, Cheng-hong Zhang2, Hai-ying Chu2, Liang-wei Yin3, Hai-ying Ma2   

  1. 1 Department of Neurosurgery, the First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning Province, China; 2 Department of Histology and Embryology, Dalian Medical University, Dalian, Liaoning Province, China; 3 Department of Oncology, Dalian Central Hospital, Dalian, Liaoning Province, China
  • Received:2017-01-13 Online:2017-03-15 Published:2017-03-15
  • Contact: Hai-ying Ma, Ph.D. or Liang-wei Yin, M.D., hyma20060602@aliyun.com or Lwyin2008@163.com.
  • Supported by:

    This research was supported by grants from the National Natural Science Foundation of China, No. 31300812 and No. 31371218.

摘要:

已知细胞骨架蛋白参与神经元的存活,脑源性神经营养因子能增加轴突损伤后再生时细胞骨架蛋白的表达,如此是否可能促进转染神经干细胞在创伤性脑损伤部位的存活。为验证这一假设,实验以控制性皮质撞击方法建立创伤性脑损伤大鼠模型,72h后在损伤大脑皮质部位注射2 × 107/mL脑源性神经营养因子基因转染神经干细胞3 mL;移植后1-3周见脑组织损伤部位中存活神经元标志物神经丝蛋白200、神经元特异性标志物微管相关蛋白2、细胞骨架有关的肌动蛋白、钙调蛋白和wnt信号通路中的关键因子β-catenin表达明显增加。说明脑源性神经营养因子基因转染神经干细胞发挥了促进病变神经元存活和移植细胞的生长和分化,其机制与调节细胞骨架蛋白及wnt/β-catenin信号通路有关。

ORCID:0000-0002-1314-7816(Hai-ying Ma);0000-0001-8893-3929(Liang-wei Yin)

关键词: 神经再生, 脑源性神经营养因子, 神经干细胞, 转染, 细胞分化, 创伤性脑损伤, 细胞骨架, 神经丝蛋白, 微管相关蛋白, 钙调蛋白, wnt/β-catenin

Abstract:

Cytoskeletal proteins are involved in neuronal survival. Brain-derived neurotrophic factor can increase expression of cytoskeletal proteins during regeneration after axonal injury. However, the effect of neural stem cells genetically modified by brain-derived neurotrophic factor transplantation on neuronal survival in the injury site still remains unclear. To examine this, we established a rat model of traumatic brain injury by controlled cortical impact. At 72 hours after injury, 2 × 107 cells/mL neural stem cells overexpressing brain-derived neurotrophic factor or naive neural stem cells (3 mL) were injected into the injured cortex. At 1–3 weeks after transplantation, expression of neurofilament 200, microtubule-associated protein 2, actin, calmodulin, and beta-catenin were remarkably increased in the injury sites. These findings confirm that brain-derived neurotrophic factor-transfected neural stem cells contribute to neuronal survival, growth, and differentiation in the injury sites. The underlying mechanisms may be associated with increased expression of cytoskeletal proteins and the Wnt/β-catenin signaling pathway.

Key words: nerve regeneration, brain-derived neurotrophic factor, neural stem cells, transfect, differentiation, traumatic brain injury, cytoskeleton, neurofilament, microtubule-associated proteins, calmodulin, Wnt/β-catenin, neural regeneration