中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (13): 2027-2032.doi: 10.3969/j.issn.2095-4344.0492

• 脐带脐血干细胞 umbilical cord blood stem cells • 上一篇    下一篇

鼠神经生长因子体外诱导脐血间充质干细胞向类神经元分化

陈 俊,杨自金   

  1. 徐州医科大学附属连云港医院(连云港市第一人民医院)儿内科,江苏省连云港市 222002
  • 修回日期:2017-12-18 出版日期:2018-05-08 发布日期:2018-05-08
  • 通讯作者: 杨自金,主任医师,硕士生导师,徐州医科大学附属连云港医院(连云港市第一人民医院)儿内科,江苏省连云港市 222002
  • 作者简介:陈俊,男,1991年生,湖北省随州市人,汉族,徐州医科大学在读硕士,主要从事脐血间充质干细胞相关研究。
  • 基金资助:

    江苏省连云港市科技局重点科室建设(SH1117)

Human umbilical cord blood mesenchymal stem cells differentiate into neuron-like cells: in vitro induction by mouse nerve growth factor

Chen Jun, Yang Zi-jin   

  1. Department of Pediatrics, Lianyungang Hospital Affiliated to Xuzhou Medical University (First People’s Hospital of Lianyungang), Lianyungang 222000, Jiangsu Province, China
  • Revised:2017-12-18 Online:2018-05-08 Published:2018-05-08
  • Contact: Yang Zi-jin, Chief physician, Master’s supervisor, Department of Pediatrics, Lianyungang Hospital Affiliated to Xuzhou Medical University (First People’s Hospital of Lianyungang), Lianyungang 222000, Jiangsu Province, China
  • About author:Chen Jun, Master candidate, Department of Pediatrics, Lianyungang Hospital Affiliated to Xuzhou Medical University (First People’s Hospital of Lianyungang), Lianyungang 222000, Jiangsu Province, China

摘要:

文章快速阅读:

文题释义:
鼠神经生长因子:
是从小鼠颌下腺分离纯化出的一种细胞因子,对神经元有营养支持作用,能够促进受损神经的修复,对中枢及周围神经元的发育、分化、生长、再生和功能特性的表达均具有重要的调控作用。
脐血间充质干细胞:胎儿脐血中因富含间充质干细胞而被认为是非胚胎干细胞的主要来源之一,脐血间充质干细胞相比骨髓间充质干细胞具有非侵入取材、花费少等优点,相比胚胎干细胞、神经干细胞具有来源更为原始、低免疫原性、无伦理学争议等优点,另外由于其具备向多胚层分化能力,因此成为干细胞领域研究热点。为了攻克神经系统损伤后修复的难题,如何有效诱导脐血间充质干细胞分化为类神经元用于治疗神经系统疾病是当前研究热点之一。

 

摘要
背景:
脐血间充质干细胞是从胎儿脐血中分离出的一种成体干细胞,具有分化为类神经元的潜能,可用于多种神经系统疾病的治疗。如何有效诱导脐血间充质干细胞向类神经元分化一直是干细胞领域的研究热点,具有很高的科学研究价值。
目的:探讨鼠神经生长因子在体外条件下对脐血间充质干细胞向类神经元诱导分化的作用。
方法:复苏人脐血间充质干细胞,体外扩增培养并观察细胞形态特征,绘制细胞生长曲线。取第5代脐血间充质干细胞,分别加入质量浓度为50,100,150,200 μg/L的鼠神经生长因子培养液作为诱导组,另设不加任何诱导剂的空白对照组,每日倒置显微镜下观察细胞形态变化并拍照记录,诱导7 d后采用免疫细胞化学法检测神经元特异性烯醇化酶(neuron-specific enolase,NSE)、胶质纤维酸性蛋白(glial fibrillary acidic protein,GFAP)的表达,使用Image-Pro Plus 6.0软件计算NSE、GFAP阳性表达率。
结果与结论:①脐血间充质干细胞复苏后活性达90%以上,形态为大小不一的长梭形、纺锤形,其生长曲线呈“S”型,第3-6天为细胞对数生长期;②经鼠神经生长因子诱导后细胞形态出现典型类神经元样改变,而对照组细胞形态无明显变化;③免疫细胞化学法显示鼠神经生长因子诱导后细胞NSE、GFAP均呈阳性表达,其中100 μg/L 鼠神经生长因子诱导组的NSE、GFAP阳性表达率最高,相比其他鼠神经生长因子诱导组差异有显著性意义(P < 0.05),而对照组无NSE、GFAP阳性细胞;④结果表明,鼠神经生长因子在体外能够诱导脐血间充质干细胞分化为类神经元,100 μg/L为较合适的诱导质量浓度。 

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: 0000-0002-3762-1586(陈俊)

关键词: 干细胞, 鼠神经生长因子, 脐血, 间充质干细胞, 神经元, 诱导分化, 神经元特异性烯醇化酶, 胶质纤维酸性蛋白

Abstract:

BACKGROUND: Human umbilical cord blood mesenchymal stem cells (hUCB-MSCs) are a kind of adult stem cells in the human umbilical cord blood, which have the potential to differentiate into neuron-like cells and can be used for the treatment of a variety of nervous system diseases. How to effectively induce hUCB-MSCs differentiation into neuron-like cells is always a hotspot in the stem cell research, which is of high scientific research value.
OBJECTIVE: To explore the induction effect of mouse nerve growth factor (mNGF) on the differentiation of human umbilical cord blood-derived mesenchymal stem cells into neuron-like cells in vitro
METHODS: The donated hUCB-MSCs were resuscitated and the cell morphology after culture was observed to draw a cell growth curve. Passage 5 cells were cultured in the culture medium containing 0 (blank control), 50, 100, 150, 200 μg/L mNGF, and the cell morphology was observed and recorded daily under inverted phase contrast microscope. Immunocytochemistry detection was used to examine the expression of neuron-specific enolase (NSE) and glial fibrillary acidic protein (GFAP) at 7 days of induction, and then the NSE and GFAP positive expression was calculated by Image-Pro Plus 6.0 software. 
RESULTS AND CONCLUSION: The viability of resuscitated hUCB-MSCs was up to over 90%. The cell morphology was in long shuttle shape and spindle shape with unequal size, and the cells presented with “S”-shaped growth curve and entered the logarithmic growth phase at 3-6 days. Typical neuron-like changes were observed after induction by mNGF; however, there was no change in the cell morphology in the control group. Immunocytochemical staining showed that the induced cells were positive for both NSE and GFAP, and the highest positive rates of NSE and GFAP were observed after induction by 100 μg/L mNGF (P < 0.05). In the control group, there was no positive expression of NSE and GFAP. To conclude, mNGF can induce the in vitro differentiation of hUCB-MSCs into neuron-like cells, and 100 μg/L mNGF can achieve the best induction effect. 

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: Nerve Growth Factor, Fetal Blood, Mesenchymal Stem Cells, Neurons, Cell Differentiation, Tissue Engineering

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