中国组织工程研究 ›› 2010, Vol. 14 ›› Issue (19): 3441-3445.doi: 10.3969/j.issn.1673-8225.2010.19.005

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

无血清神经培养基体外培养大鼠骨髓源性神经干细胞

陈静娟,李  华,许志恩,柯俊龙   

  1. 广东医学院第一附属医院神经内科,广东省湛江市 523024
  • 出版日期:2010-05-07 发布日期:2010-05-07
  • 通讯作者: 许志恩,主任医师,广东医学院第一附属医院神经内科,广东省湛江市 523024 zjxuzhien@126.com
  • 作者简介:陈静娟,女,广东省佛山市人,汉族,广东医学院在读硕士,主要从事神经内科方面的研究。 chenjingjuansky@qq.com

Culture of bone marrow-derived neural stem cells using serum-free neural induction medium

Chen Jing-juan, Li Hua, Xu Zhi-en, Ke Jun-long   

  1. Department of Neurology, First Affiliated Hospital of Guangdong Medical College, Zhanjiang 523024, Guangdong Province, China
  • Online:2010-05-07 Published:2010-05-07
  • Contact: Xu Zhi-en, Chief physician, Department of Neurology, First Affiliated Hospital of Guangdong Medical College, Zhanjiang 523024, Guangdong Province, China zjxuzhien@126.com
  • About author:Chen Jing-juan, Studying for master’s degree, Department of Neurology, First Affiliated Hospital of Guangdong Medical College, Zhanjiang 523024, Guangdong Province, China chenjingjuansky@qq.com

摘要:

背景:传统的胚胎来源和脑来源的神经干细胞由于取材困难,并受伦理道德的约束,应用受到极大限制。
目的:拟利用无血清神经培养基体外培养大鼠骨髓源性神经干细胞。
方法:抽取大鼠股骨和胫骨的骨髓,采用全骨髓培养及贴壁筛选法分离培养骨髓间充质干细胞,流式细胞仪检测细胞周期及细胞免疫表型,油红O染色及茜素红染色鉴定其成骨、成脂能力。取传至4~6代的大鼠骨髓间充质干细胞,加入含表皮生长因子、碱性成纤维生长因子、B27的DMEM/F12无血清神经培养基进行诱导,采用免疫荧光染色及流式细胞仪予以鉴定。
结果与结论:P5骨髓间充质干细胞(91.5±3.1)%处于G1期,高表达CD90及CD29,不表达CD45及CD34,成脂诱导后在胞质中可见桔红色脂滴,成骨诱导后可见黑色矿化结节。骨髓源性神经干细胞巢蛋白免疫荧光染色呈阳性,流式细胞仪检测其阳性率为(97.2±1.1)%,NSE,β-Tubulin,GFAP及MAP-2抗原免疫荧光染色均呈阳性表达。表明在无血清神经培养基中加入特定生长因子,骨髓间充质干细胞可诱导为神经干细胞;在体外适当条件下,骨髓源性神经干细胞具有增殖和分化为神经元、星形胶质细胞及少突胶质细胞的能力。

关键词: 无血清培养, 巢蛋白, 骨髓源性, 神经干细胞, 骨髓间充质干细胞

Abstract:

BACKGROUND: The application of embryo or brain-derived neural stem cells has been greatly hampered by ethical and moral constraints or technical difficulties. 
OBJECTIVE: To culture SD rat bone marrow-derived neural stem cells in vitro using serum-free neural induction medium.
METHODS: Bone marrow mesenchymal cells (BMSCs) were collected from rat femurs and tibias, which were isolated and cultured by the whole bone marrow culture and adherence method. The cell cycle and immunophenotype were detected by flow cytometry, and the osteogenic and adipogenic potential were identified by oil red O staining and alizarin red staining. The 4-6 generations of BMSCs were incubated to differentiate into bone marrow-derived neural stem cells under serum-free medium containing epidermal growth factor, basic fibroblast growth factor and B27, followed by DMEM/F12 supplemented with fetal calf serum, the differentiated cells were identified by immunofluorescence and flow cytometry.
RESULTS AND CONCLUSION: (91.5±3.1)% of the P5 BMSCs were in G1 phase, which highly expressed CD90 and CD29, but not expressed CD45 and CD34. Reddish yellow lipid droplet could be seen after osteogenic induction, and black mineralized nodules could be found after adipogenic induction. Bone marrow-derived neural stem cells were positive to nidogen immunofluorescence staining, and the positive rate was (97.2±1.1)%. The cells expressed neuron specific enolase, β-Tubulin, glial fibrillary acidic protein as well as microtubule-associated protein-2 antigen. It demonstrated that BMSCs can differentiate into neural stem cells under the induction of serum-free neural induction medium combined with certain growth factors. And the bone marrow-derived neural stem cells have the ability of differentiation into neurons, astrocytes or oligodendrocytes.

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