中国组织工程研究 ›› 2015, Vol. 19 ›› Issue (19): 3054-3060.doi: 10.3969/j.issn.2095-4344.2015.19.018

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

神经干细胞体外培养鉴定及诱导分化的表型特征

刘吉星,侯博儒,杨文桢,马浚宁,严贵忠,陈四化,尹立山,王 刚,任海军   

  1. 兰州大学第二医院神经外科,甘肃省兰州市  730030
  • 出版日期:2015-05-06 发布日期:2015-05-06
  • 通讯作者: 任海军,教授,硕士生导师,主任医师,兰州大学第二医院神经外科,甘肃省兰州市 730030
  • 作者简介:刘吉星,男,1990年生,湖北省荆门市人,汉族,兰州大学在读硕士,主要从事神经干细胞治疗颅脑外伤基础方面的研究。
  • 基金资助:

    甘肃电信萃英科研基金资助项目(lzudxcy-2014-8)

Neural stem cells: in vitro culture, identification and differentiated phenotype

Liu Ji-xing, Hou Bo-ru, Yang Wen-zhen, Ma Jun-ning, Yan Gui-zhong, Chen Si-hua, Yin Li-shan,
Wang Gang, Ren Hai-jun   

  1. Department of Neurosurgery, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu Province, China
  • Online:2015-05-06 Published:2015-05-06
  • Contact: Ren Hai-jun, Professor, Master’s supervisor, Chief physician, Department of Neurosurgery, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu Province, China
  • About author:Liu Ji-xing, Studying for master’s degree, Department of Neurosurgery, the Second Hospital of Lanzhou University, Lanzhou 730030, Gansu Province, China
  • Supported by:

    Cui Ying Scientific Research Fund of Gansu Telecom, No. lzudxcy-2014-8

摘要:

背景:神经干细胞促进受损中枢神经系统结构和功能再修复具有广阔的应用前景,而进行神经干细胞体外培养鉴定及诱导分化表型的研究是实现这一应用的基础。
目的:观察神经干细胞在体外培养条件下的生物学特性和分化表型特点。
方法:从新生小鼠海马、嗅球提取神经干细胞。选取3代后稳定的神经干细胞采用BrdU进行标记,并进行BrdU+巢蛋白+Hochest33258免疫荧光复合染色对神经干细胞进行鉴定。体外诱导促使神经干细胞贴壁分化,对分化产生的子代细胞进行BrdU、β-微管蛋白Ⅲ、胶质纤维酸性蛋白、Hochest33258复合免疫荧光染色确定分化表型。
结果与结论:来源于新生鼠海马及嗅球的细胞连续传代培养后可形成稳定悬浮的类球状细胞团,且BrdU+巢蛋白免疫荧光双染阳性。神经干细胞体外诱导贴壁分化后可产生β-微管蛋白Ⅲ、胶质纤维酸性蛋白阳性的子代细胞。以上结果表明体外培养的神经干细胞具有很强的自我增殖更新的能力,在培养过程中趋向于形成稳定的神经球,经体外诱导通过不对称细胞增殖、分化产生神经元和星形胶质细胞等细胞表型。

关键词: 干细胞, 神经干细胞, 神经元, 星形胶质细胞, 神经球, 巢蛋白, β-微管蛋白Ⅲ, 胶质纤维酸性蛋白, 分化表型

Abstract:

BACKGROUND: Neural stem cells can repair the damaged central nervous system structure and function, which have broad application prospects. It can be realized by studies on in vitro culture, identification and differentiation phenotype of neural stem cells.
OBJECTIVE: To observe the biological characteristics and differentiated phenotypes of neural stem cells under induction in vitro.
METHODS: Neural stem cells were extracted from the hippocampus and olfactory bulb of newborn mice. After three generations, neural stem cells were labeled with 5-bromo-2-deoxyuridine (BrdU) and identified by immunofluorescence staining of BrdU, nestin and Hochest33258. The differentiation of neural stem cells was induced in vitro and identified by immunofluorescent staining of BrdU, β-tubulinⅢ, glial fibrillary acidic protein and Hochest33258.
RESULTS AND CONCLUSION: After passage, neural stem cells from the hippocampus and olfactory bulb of newborn mice could be aggregated into neurospheres that were positive for nestin and BrdU. Under induced differentiation in vitro, neural stem cells gradually turned into daughter cells which positively expressed β-tubulin III or glial fibrillary acidic protein. These findings suggest that neural stem cells have strong self-renewal capacity and have the tendency to form neurospheres during culture in vitro; under in vitro induction, they can differentiate 
into neurons and astrocytes through asymmetric cell proliferation and differentiation.

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