中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (33): 5344-5349.doi: 10.3969/j.issn.2095-4344.0669

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

miR-124抑制Notch通路促进神经干细胞增殖与分化

何 频,郭富强   

  1. 西南医科大学临床医学院,四川省泸州市 646000
  • 修回日期:2018-07-25 出版日期:2018-11-28 发布日期:2018-11-28
  • 通讯作者: 郭富强,主任医师,西南医科大学临床医学院,四川省泸州市 646000
  • 作者简介:何频,男,1989年生,四川省邛崃市人,汉族,2011年泸州医学院毕业,主治医师,主要从事神经内科临床研究。

miR-124 facilitates the proliferation and differentiation of neural stem cells by inhibiting the Notch pathway

He Pin, Guo Fu-qiang   

  1. School of Clinical Medicine, Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • Revised:2018-07-25 Online:2018-11-28 Published:2018-11-28
  • Contact: Guo Fu-qiang, Chief physician, School of Clinical Medicine, Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • About author:He Pin, Attending physician, School of Clinical Medicine, Southwest Medical University, Luzhou 646000, Sichuan Province, China

摘要:

文章快速阅读:

文题释义:
miR-124:
是一种在线虫、小鼠和人体细胞内均有表达的非编码小RNA,前期研究发现miR-124是神经细胞中表达最为丰富的小RNA,并且在神经分化过程中起着极其重要的作用。
神经干细胞:是中枢神经系统中的一类细胞,具有细胞增殖和分化能力的特点,是神经细胞发育早期特定的细胞群体。深入研究神经干细胞的增殖与分化等生理过程,为神经系统损伤和退行性疾病的治疗带来了希望。

 

摘要
背景:
如何在体外快速而高效的获得大量高纯度神经细胞是目前国内外细胞移植治疗领域所面临的一个巨大挑战和难题。
目的:探讨miR-124是否通过调控Notch通路对神经干细胞增殖与分化产生影响。
方法:分离胎鼠神经干细胞,利用免疫荧光法进行鉴定,采用RT-qPCR法检测神经干细胞分化1,2,4,7 d后miR-124表达情况,利用瞬时转染法分别过表达和干扰miR-124后,采用MTT法和免疫印迹法检测ki-67蛋白表达水平观察细胞增殖情况,采用RT-qPCR法和免疫印迹法检测β-tubulin Ⅲ表达水平观察细胞分化情况,采用RT-qPCR法检测Notch通路相关蛋白HES1,HEY2和CCND1的mRNA表达。
结果与结论:①神经干细胞在向神经细胞分化过程中,miR-124的表达水平显著升高;②过表达miR-124不仅能够促进细胞增殖与分化,同时对Notch通路相关蛋白起到了抑制作用;③抑制miR-124表达起到了与上述相反的作用;④以上结果提示miR-124可能通过抑制Notch通路促进神经干细胞的增殖与分化。

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:
0000-0001-5742-9252(何频)

关键词: miR-124, 神经干细胞, Notch, 细胞增殖, 细胞分化, 干细胞

Abstract:

BACKGROUND: How to quickly and efficiently obtain enough pure neurons in vitro is a huge challenge and problem faced by the scientists in the cell-transplantation field.
OBJECTIVE: To explore whether miR-124 can influence the proliferation and differentiation of neural stem cells by regulating the Notch pathway.
METHODS: The fetal rat neural stem cells were isolated and identified by immunofluorescence. RT-qPCR was used to detect the expression of miR-124 after 1, 2, 4, and 7 days of neural stem cell differentiation. After overexpression and interference with miR-124 via transient transfection, the expression of ki-67 protein was detected by MTT assay and immunoblotting. RT-qPCR and immunoblotting were used to detect β-tubulin III expression for determination of miR-124 effects on cell differentiation. RT-qPCR was used to detect the mRNA expression of Notch pathway-related proteins HES1, HEY2 and CCND1.
RESULTS AND CONCLUSION: During the differentiation of neural stem cells into neurons, the expression of miR-124 was significantly upregulated. Moreover, miR-124 overexpression promoted the proliferation and differentiation of NSCs, and suppressed the expression of proteins in the Notch pathway. Silencing the miR-124 expression, however, achieved the opposite results. The above results suggest that miR-124 may promote the proliferation and differentiation of neural stem cells by inhibiting the Notch pathway. 


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: MicroRNAs, Neural Stem Cells, Receptors, Notch, Cell Proliferation, Cell Differentiation, Tissue Engineering

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