中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (29): 4605-4609.doi: 10.3969/j.issn.2095-4344.1818

• 骨髓干细胞 bone marrow stem cells • 上一篇    下一篇

胶质细胞源性神经营养因子体外诱导骨髓间充质干细胞向神经元样细胞的分化

刘振东1,王  瑞1,杨建东2,王静成2   

  1. 1德州市人民医院,山东省德州市  253000;2江苏省苏北人民医院,江苏省扬州市  225000
  • 修回日期:2019-05-16 出版日期:2019-10-18 发布日期:2019-10-18
  • 通讯作者: 杨建东,博士,硕士生导师,江苏省苏北人民医院,江苏省扬州市 225000
  • 作者简介:刘振东,男,1985年生,山东省德州市人,汉族,2012年扬州大学毕业,硕士,主治医师,主要从事骨科相关干细胞分化研究。
  • 基金资助:

    国家自然科学基金项目(81071466),项目负责人:杨建东

Bone marrow mesenchymal stem cells induced by glial cell line-derived neurotrophic factors differentiate into neuron-like cells in vitro

Liu Zhendong1, Wang Rui1, Yang Jiandong2, Wang Jingcheng2   

  1. 1Dezhou People’s Hospital, Dezhou 253000, Shandong Province, China; 2Northern Jiangsu People’s Hospital, Yangzhou 225000, Jiangsu Province, China
  • Revised:2019-05-16 Online:2019-10-18 Published:2019-10-18
  • Contact: Yang Jiandong, MD, Master’s supervisor, Northern Jiangsu People’s Hospital, Yangzhou 225000, Jiangsu Province, China
  • About author:Liu Zhendong, Master, Attending physician, Dezhou People’s Hospital, Dezhou 253000, Shandong Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81071466 (to YJD)

摘要:

文章快速阅读:

文题释义:
胶质细胞源性神经营养因子:
是一种作用力强并且作用范围广谱的神经营养物质,属于转化生长因子超家族,随机体发育阶段和部位的不同,其作用也不尽相同,并具有靶源性神经营养因子的作用。
骨髓间充质干细胞诱导分化:骨髓间充质干细胞是来源于中胚层的干细胞,具有多向分化潜能以及高度的增殖能力。不同诱导条件下可分化为软骨细胞、骨细胞、心肌细胞、肝细胞、脂肪细胞、血管内皮细胞、胰岛细胞、神经细胞等多种细胞。

 

摘要
背景:
骨髓间充质干细胞作为中胚层来源的多能干细胞,除了能够分化为间充质系细胞如成骨细胞、脂肪细胞和软骨细胞外,还具有神经分化潜能,具有广阔的应用前景。
目的:探讨胶质细胞源性神经营养因子体外诱导骨髓间充质干细胞分化为神经元样细胞的可行性。
方法:选用健康SD大鼠,采用全骨髓贴壁法体外培养、纯化骨髓间充质干细胞,经流式细胞仪进行细胞表型鉴定。取生长状态良好的第4代骨髓间充质干细胞进行实验分组:对照组不加任何诱导剂;实验组培养液内加入胶质细胞源性营养因子,调整质量浓度分别为20,50,100 μg/L,倒置相差显微镜连续观察细胞生长情况及形态变化。诱导6,12,24,48,72 h,采用免疫组化法检测巢蛋白、神经元特异性烯醇化酶的表达。
结果与结论:①原代提取获得的骨髓间充质干细胞形态均一性较好,流式细胞仪检测结果为CD44,CD90呈强阳性表达,CD34,CD45阳性表达率很低;②经胶质细胞源性营养因子诱导后,细胞胞体逐渐向胞核收缩,变形细胞逐渐增多,出现双极、多极和锥形等典型的神经元样细胞形态,细胞边缘出现突起,且与邻近细胞突起逐渐相互连接;③胶质细胞源性营养因子诱导6 h后出现巢蛋白表达阳性,24 h后达顶峰,50,100 μg/L胶质细胞源性营养因子组巢蛋白表达显著高于20 μg/L胶质细胞源性营养因子组。胶质细胞源性营养因子诱导12 h后检测到神经元特异性烯醇化酶表达阳性,且表达强度随时间延长逐渐增加,48 h后达顶峰,50,100 μg/L胶质细胞源性营养因子组巢蛋白表达显著高于20 μg/L胶质细胞源性营养因子组。对照组未见明显神经元样细胞的形态变化及特异性标志的阳性表达;④结果表明,大鼠骨髓间充质干细胞可通过全骨髓贴壁法在体外进行原代提取分离及传代培养,经胶质细胞源性营养因子诱导后具有向神经元样细胞分化的潜能。


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: 0000-0001-8002-2733(刘振东)

关键词: 骨髓间充质干细胞, 胶质细胞源性神经营养因子, 细胞分化, 神经细胞, 巢蛋白, 神经元特异性烯醇化酶, 国家自然科学基金

Abstract:

BACKGROUND: Bone marrow mesenchymal stem cells are pluripotent stem cells in mesoderm, not only differentiating into mesenchymal lineage cells such as osteoblasts, adipocytes and chondrocytes, but also having a neural differentiation potential. Therefore, they have a wide range of applications.
OBJECTIVE: To investigate the feasibility of bone marrow mesenchymal stem cells differentiating into neuron-like cells after in vitro induction with glial cell line-derived neurotrophic factor.
METHODS: Bone marrow mesenchymal stem cells from healthy Sprague-Dawley rats were cultured and purified in vitro using the whole bone marrow culture method. Cell phenotypes were identified using flow cytometry. Passage 4 bone marrow mesenchymal stem cells growing well were assigned into control group with no induction or experimental groups with addition of 20, 50, and 100 μg/L glial cell line-derived neurotrophic factors. Cell growth and morphology were continuously observed by inverted phase contrast microscope. Expressions of nestin and neuron-specific enolase were identified by immunocytochemical technique at 6, 12, 24, 48, and 72 hours of induction.
RESULTS AND CONCLUSION: (1) Primary cultured bone marrow mesenchymal stem cells appeared with high morphological uniformity and strongly expressed CD44 and CD90, and lowly expressed CD34 and CD45. (2) After induction with glial cell line-derived neurotrophic factors, the cell body gradually shrank towards the nucleus, accompanied by cell deformation that the cells presented with the typical morphologies of neuron-like cells, such as dipolar, multipolar and pyramidal. Cell protuberances extended and were gradually interconnected with adjacent cells. (3) The cells were positive for nestin at 6 hours of induction with glial cell line-derived neurotrophic factors, and the positive expression peaked at 24 hours of induction. Neuron-specific enolase expressed positively at 12 hours of induction and the expression peak appeared at 48 hours of induction. The expression levels of nestin and neuron-specific enolase were significantly higher in the 50 and 100 μg/L glial cell line-derived neurotrophic factor group than the 20 μg/L glial cell line-derived neurotrophic factor group. There were no obvious morphological changes and specific marker expressions of neuron-like cells in the control group. To conclude, rat bone marrow mesenchymal stem cells isolated by the whole bone marrow culture method can be cultured primarily and subcultured in vitro, and have the potential to differentiate into neuron-like cells induced by glial cell line-derived neurotrophic factor.

Key words: bone marrow mesenchymal stem cells, glial cell line-derived neurotrophic factor, cell differentiation, nerve cells, nestin, neuron-specific enolase, National Natural Science Foundation of China

中图分类号: