中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (17): 2708-2713.doi: 10.3969/j.issn.2095-4344.2017.17.014

• 干细胞培养与分化 stem cell culture and differentiation • 上一篇    下一篇

神经干细胞的培养鉴定及分化

朱  琼1,皋月娟2,高顺记1,陈  重1,刘  政1,徐亚丽1   

  1. 1解放军第三军医大学第二附属医院超声科,重庆市  400037;2解放军第三○二医院超声科,北京市  100039
  • 修回日期:2017-01-10 出版日期:2017-06-18 发布日期:2017-06-29
  • 通讯作者: 徐亚丽,博士,副主任医师,副教授,解放军第三军医大学第二附属医院超声科,重庆市 400037
  • 作者简介:朱琼,女,1990年生,重庆市人,汉族,2009年第三军医大学毕业,在读硕士,主要从事神经干细胞治疗阿尔茨海默病的作用及机制研究。
  • 基金资助:

    国家自然科学基金面上项目(81471795);全军医学科技青年培育计划(16QNP102)

Cultivation, identification and differentiation of neural stem cells

Zhu Qiong1, Hao Yue-juan2, Gao Shun-ji1, Chen Zhong1, Liu Zheng1, Xu Ya-li1   

  1. 1Department of Ultrasound, Second Affiliate Hospital of Third Military Medical University, Chongqing 400037, China; 2Department of Ultrasound, the 302nd Hospital of PLA, Beijing 100039, China
  • Revised:2017-01-10 Online:2017-06-18 Published:2017-06-29
  • Contact: Xu Ya-li, M.D., Associate chief physician, Department of Ultrasound, Second Affiliate Hospital of Third Military Medical University, Chongqing 400037, China
  • About author:Zhu Qiong, Studying for master’s degree, Department of Ultrasound, Second Affiliate Hospital of Third Military Medical University, Chongqing 400037, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81471795; the Military Medical Incubation Plan for the Youth, No. 16QNP102

摘要:

文章快速阅读:

文题释义:
神经干细胞:
是具有自我更新和多向分化潜能的原始细胞,主要存在于侧脑室下区和海马齿状回颗粒下层,不仅能分化为多种类型的神经细胞替代缺失神经组织,同时能产生多种细胞因子,如脑源性神经营养因子、神经生长因子及胶质源性神经营养因子等,并促进突触发生,调节其可塑性,且能重建部分环路和功能,是神经元替代治疗的理想靶细胞。
细胞分化:指同一来源的细胞逐渐由全能到多能,最后到单能,从而产生形态功能不同的细胞群的过程,其本质是基因组在时间和空间上的选择性表达。如神经干细胞能分化为多种类型神经细胞:星形胶质细胞、小胶质细胞及神经元。同时该过程受局部微环境调节,多种理化因素都能诱导全能细胞产生分化,如血清诱导神经干细胞分化。

 

摘要
背景:
神经干细胞在神经损伤修复和退行性疾病中有广泛的应用前景,体外培养鉴定及促神经元诱导分化是后续研究的基础。
目的:采用悬浮神经球培养法分离培养神经干细胞并对其鉴定,了解生物学特性。
方法:采用悬浮神经球培养法从C57BL/6胎鼠大脑半球分离培养神经干细胞,观察形态特征及超微结构,CCK-8法绘制生长曲线,流式细胞仪检测细胞周期,免疫荧光法检测特异性标志蛋白Nestin的表达;用体积分数为1%和10%的血清诱导分化后,免疫荧光法检测GFAP、βⅢ-tubulin和MBP的表达。
结果与结论:①体外培养得到悬浮生长的神经球,生长曲线和细胞周期表明细胞增殖力强;②透射电镜观察到神经干细胞核浆比高,呈未分化状态;③Nestin免疫荧光阳性;④不同体积分数的血清诱导后均可分化为星形胶质细胞、神经元和少突胶质细胞,体积分数为1%血清能诱导分化得到更多的神经元细胞;⑤结果表明,采用悬浮神经球培养法成功分离培养得到了神经干细胞,低体积分数血清有利于神经干细胞向神经元分化。

 

 

ORCID: 0000-0002-1810-5009(朱琼)

关键词: 干细胞, 分化, 神经干细胞, 培养, 鉴定, 血清, 诱导分化, 国家自然科学基金

Abstract:

BACKGROUND: Neural stem cell transplantation is an emerging therapeutic option in the recovery of neural lesions and neurodegenerative diseases. Neural stem cell culture and differentiation lay a foundation for the further study.
OBJECTIVE: To improve the techniques for the isolation, cultivation, differentiation and identification of neural  stem cells, and to explore the biological characteristics of cells. 
METHODS: The neural stem cells from C57BL/6 fetal rats were isolated and cultured in vitro using neurophere culture method followed by morphological and ultrastucture examination. The growth curve and cell cycle of passage 3 cells were drawn and analyzed. Nestin expression was tested by immunofluorescence. Neural stem cells induced in 1% and 10% fetal bovine serum were identified using anti-GFAP, anti-βIII-tubulin and anti-MBP by immunofluorescence.
RESULTS AND CONCLUSION: The neurospheres exhibited strong cell proliferation ability. Under transmission electron microscope, there was a high nuclear/cytoplasmic ratio in the neural stem cells, indicating a low differentiation degree. Immunofluorescence analysis revealed that neural stem cells were positive for Nestin. The induced cells were positive for GFAP, βIII-tubulin, and MBP, indicating these cells were induced to differentiate into astrocytes, neurons and oligodendrocytes, and there were more neurons in 1% fetal bovine serum than those in 10% fetal bovine serum. In conclusion, we could successfully isolate neural stem cells in C57BL/6 mice, and low concentration of fetal bovine serum contributes to more neurons differentiated from neural stem cells.

 

 

Key words: Neural Stem Cells, Cells, Cultured, Serum, Cell Differentiation, Tissue Engineering

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