中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (9): 1432-1437.doi: 10.3969/j.issn.2095-4344.0476

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

活性生物材料支架体外诱导神经干细胞向神经元高比例分化并形成神经网络

李 莹1,张皑峰2,高钰丹1,3,赵 文1,3,段红梅1,3,郝 鹏1,3,尚俊奎1,杨朝阳1,3,李晓光1,3   

  1. 1首都医科大学神经生物学系,北京市 100069;2首都医科大学附属北京友谊医院口腔科,北京市 100050;3北京航空航天大学生物与医学工程学院,生物材料和神经再生北京市实验室,大数据精准医疗高精尖创新中心,北京市 100191
  • 修回日期:2018-02-01 出版日期:2018-03-28 发布日期:2018-04-03
  • 通讯作者: 李晓光,博士,教授,首都医科大学神经生物学系,北京市 100069;北京航空航天大学生物与医学工程学院,生物材料和神经再生北京市实验室,大数据精准医疗高精尖创新中心,北京市 100191
  • 作者简介:李莹,女,1990年生,青海省西宁市人,首都医科大学在读硕士,主要从事应用活性生物材料支架体外构建神经环路及其影响的相关研究。
  • 基金资助:

    国家重点研发计划(2017YFC1104002;2017YFC1104001);国家自然科学基金面上项目(31670988;31771053);国家自然科学基金应急管理项目(31650001);国家自然科学基金国际(地区)合作与交流项目(31320103903);高等学校全国优秀博士学位论文作者专项资金资助项目(201356);国家自然科学基金重点项目(31730030);北京市科技计划(Z171100002217066)

High-proportion differentiation of neural stem cells into neurons and formation of neural networks induced by active biomaterial scaffolds in vitro

Li Ying1, Zhang Ai-feng2, Gao Yu-dan1, 3, Zhao Wen1, 3, Duan Hong-mei1, 3, Hao Peng1, 3, Shang Jun-kui1, Yang Zhao-yang1, 3, Li Xiao-guang1, 3   

  1. 1Department of Neurobiology, Capital Medical University, Beijing 100069, China; 2Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China; 3Department of Biomedical Engineering, School of Biological Science and Medical Engineering, Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, Beihang University, Beijing 100191, China
  • Revised:2018-02-01 Online:2018-03-28 Published:2018-04-03
  • Contact: Li Xiao-guang, M.D., Professor, Department of Neurobiology, Capital Medical University, Beijing 100069, China; School of Biological Science and Medical Engineering, Beijing Advanced Innovation Center for Big Data-Based Precision, Beihang University, Beijing 100191, China
  • About author:Li Ying, Master candidate, Department of Neurobiology, Capital Medical University, Beijing 100069, China
  • Supported by:

    the National Key Research and Development Program of China, No. 2017YFC1104002, 2017YFC1104001; General Programs of National Natural Science Foundation of China, No. 31670988, 31771053; Emergency Management Program of National Natural Science Foundation of China, No. 31650001; Projects of International Cooperation and Exchanges of National Natural Science Foundation of China, No. 31320103903; Key Program of National Natural Science Foundation of China, No. 31730030; Special Funds for the Authors of Excellent Doctoral Dissertations of Universities and Colleges, No. 201356; Beijing Science and Technology Program, No. Z171100002217066

摘要:

文章快速阅读:

文题释义:
活性生物材料支架:
神经营养因子3-壳聚糖活性生物材料支架,可以在体外缓慢释放神经营养因子3长达14周,具有良好的生物活性和组织相容性,能为体外细胞培养及体内细胞生长提供良好的细胞外微环境。
神经干细胞:存在于神经系统中,具有自我更新功能的细胞群落,有分化为神经元、星形胶质细胞、少突胶质细胞的潜能。神经营养因子3-壳聚糖活性生物材料支架能够高比例诱导神经干细胞向神经元分化并抑制胶质细胞的形成,为研究神经干细胞向神经元的定向分化及神经干细胞移植治疗中枢神经损伤、神经退行性病变、脑卒中等疾病提供新思路。
神经网络:各级神经元之间通过突触形成的网络,是神经元间信号传递和中枢神经系统执行功能的结构基础。

 

摘要
背景:
活性生物材料的良好组织相容性和生物活性与神经干细胞的多向分化潜能均有极大的应用前景和应用价值。
目的:观察神经营养因子3-壳聚糖活性生物材料支架在体外对神经干细胞的诱导分化作用及神经干细胞神经营养因子3信号通路关键蛋白的表达。
方法:提取并纯化新生24 h Wistar大鼠脊髓神经干细胞,分4组进行诱导分化:对照组(单纯培养基组)、可溶性神经营养因子3组、单纯壳聚糖组、神经营养因子3-壳聚糖组。诱导6 h,提取蛋白质行Western Blot检测神经营养因子3信号通路关键蛋白TrkC、Akt/p-Akt、Erk/p-Erk的表达;诱导7 d,行MAP2、MBP、GFAP免疫细胞化学染色观察神经元的多向分化及各类细胞的分化比例;诱导14 d,行MAP2、Synapsin-1、PSD95免疫细胞化学染色观察神经营养因子3-壳聚糖活性生物材料是否诱导神经干细胞分化形成神经网络。
结果与结论:①神经营养因子3-壳聚糖组诱导神经干细胞高比例分化为神经元,比例为73.8%,明显高于其他3组,同时分化形成的胶质细胞低于其他3组;②神经营养因子3-壳聚糖组中关键蛋白TrkC、p-Akt、p-Erk的表达高于其他3组;③神经营养因子3-壳聚糖可以诱导神经干细胞在体外分化形成神经网络。

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程
ORCID: 0000-0002-8899-7313(李莹)

关键词: 神经干细胞, 神经营养因子, 壳聚糖, TrkC受体, MAPK/Erk信号通路, Akt信号通路, 神经网络, 干细胞, 国家自然科学基金

Abstract:

BACKGROUND: Either good biocompatibility and biological activity of active biological materials or the potential of multidirectional differentiation of neural stem cells has great application prospect and value.
OBJECTIVE: To investigate the effect of neurotrophic factor 3-chitosan active biomaterial scaffolds on the differentiation of neural stem cells and the expression of key proteins of the neurotrophic factor 3 signal pathway in vitro.
METHODS: The neural stem cells were extracted and purified, and then divided into pure culture medium group, soluble neurotrophic factor 3 group, pure chitosan group, and neurotrophic factor 3-chitosan group for differentiation induction. The expression of TrkC, Akt / p-Akt and Erk/p-Erk in the neurotrophic factor 3 signaling pathway was detected by western blot after 6 hours of induction. After 7 days of induction, differentiation of neural stem cells was observed by immunocytochemistry of MAP2, MBP, and GFAP. After 14 days of induction, formation of neural network induced by neurotrophic factor 3-chitosan active biomaterials was observed by immunocytochemistry of MAP2, Synapsin-1, and PSD95.
RESULTS AND CONCLUSION: The neurotrophic factor 3-chitosan group induced a high proportion of neural stem cells differentiated into neurons, with a ratio of 73.8%, which was significantly higher than that in the other three groups. Meanwhile, the proportion of cells differentiated into glial cells waslower than that in the other three groups. The expression of key proteins TrkC, p-Akt and p-Erk in the neurotrophic factor 3-chitosan group was higher than that in the other three groups. Meanwhile, neurotrophic factor 3-chitosan could induce the in vitro differentiation of neural stem cells to form neural network.

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

Key words: Neural Stem Cells, Neurotrophin 3, Chitosan, Neurons, Tissue Engineering

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