中国神经再生研究(英文版) ›› 2016, Vol. 11 ›› Issue (4): 597-603.doi: 10.4103/1673-5374.180744

• 原著:脑损伤修复保护与再生 • 上一篇    下一篇

失神经支配海马仍可以为内源性神经分化提供有利的微环境

  

  • 收稿日期:2016-02-22 出版日期:2016-04-30 发布日期:2016-04-30
  • 基金资助:

    江苏省高校自然科学研究面上项目(13KJB310010, 14KJB310015);南通市自然科学基金项目(14ZY022)

Denervated hippocampus provides a favorable microenvironment for neuronal differentiation of endogenous neural stem cells

Lei Zhang#, Xiao Han#, Xiang Cheng, Xue-feng Tan, He-yan Zhao, Xin-hua Zhang*   

  1. Department of Human Anatomy, Institute of Neurobiology, Jiangsu Key Laboratory of Neuroregeneration, Medical School, Nantong University, Nantong, Jiangsu Province, China
  • Received:2016-02-22 Online:2016-04-30 Published:2016-04-30
  • Contact: Xin-hua Zhang, Ph.D., zhangxinhua@ntu.edu.cn.
  • Supported by:

    This work was supported by grants of Jiangsu Natural College Foundation of China, No. 13KJB310010, 14KJB310015; the Natural Foundation of Nantong University of China, No. 14ZY022.

摘要:

穹窿海马伞切断可诱导外源和内源神经干细胞向神经元分化,说明失神经支配的海马可以为向神经元分化提供有利的环境。然而,对于此过程涉及的相关通路及机制尚不清楚。实验切断大鼠穹窿海马伞7d后,反转录PCR、Western blot和ELISA检测到,失神经支配的海马中睫状神经营养因子mRNA和蛋白表达均明显增加。继而将来源于E17胎鼠海马的神经干细胞经睫状神经营养因子干预7d后,发现神经元标志物微管相关蛋白2阳性细胞数量明显增加,而神经胶质细胞标志物神经胶质纤维酸性蛋白阳性细胞数量减少。说明睫状神经营养因子表达在失神经支配海马中上调,其可能是促进失神经支配海马神经干细胞神经分化的原因之一。

orcid: 0000-0002-5702-6733 (Xin-hua Zhang)

关键词: 神经再生, 睫状神经营养因子, 海马, 神经干细胞, 神经元, 神经分化, 穹窿海马伞切断

Abstract:

Fimbria-fornix transection induces both exogenous and endogenous neural stem cells to differentiate into neurons in the hippocampus.
This indicates that the denervated hippocampus provides an environment for neuronal differentiation of neural stem cells. However, the
pathways and mechanisms in this process are still unclear. Seven days after fimbria fornix transection, our reverse transcription polymerase
chain reaction, western blot assay, and enzyme linked immunosorbent assay results show a significant increase in ciliary neurotrophic
factor mRNA and protein expression in the denervated hippocampus. Moreover, neural stem cells derived from hippocampi of fetal (embryonic
day 17) Sprague-Dawley rats were treated with ciliary neurotrophic factor for 7 days, with an increased number of microtubule
associated protein-2-positive cells and decreased number of glial fibrillary acidic protein-positive cells detected. Our results show that ciliary
neurotrophic factor expression is up-regulated in the denervated hippocampus, which may promote neuronal differentiation of neural
stem cells in the denervated hippocampus.

Key words: nerve regeneration, ciliary neurotrophic factor, hippocampus, neural stem cells, neurons, neuronal differentiation, fimbria-fornix transection, neural regeneration