中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (9): 1444-1449.doi: 10.3969/j.issn.2095-4344.2017.09.024

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

Runx2基因高表达对脐血间充质干细胞成骨分化相关基因表达的影响

周大凯1,李慧宁1,马珊珊2,程  田3   

  1. 1新乡市中心医院脊柱外科,河南省新乡市  453000;2郑州大学生命科学学院,河南省郑州市  450001;3郑州大学第一附属医院,河南省郑州市  450052
  • 出版日期:2017-03-28 发布日期:2017-03-31
  • 通讯作者: 程田,博士,主治医师,郑州大学第一附属医院,河南省郑州市 450052
  • 作者简介:周大凯,男,1982年生,河南省新乡市人,汉族,2008年南方医科大学毕业,硕士,主治医师,主要从事干细胞与脊髓损伤的研究。
  • 基金资助:

    国家自然科学基金资助项目(U1404313),课题名称:HDAC1双向调控在脐带MSCs向神经元样细胞定向分化过程中的作用和机制研究

Runx2 over-expression effect on expression of osteogenesis related genes in osteogenic differentiation of human umbilical cord blood mesenchymal stem cells

Zhou Da-kai1, Li Hui-ning1, Ma Shan-shan2, Cheng Tian3   

  1. 1Department of Spinal Surgery, Xinxiang Central Hospital, Xinxiang 453000, Henan Province, China; 2School of Life Science, Zhengzhou University, Zhengzhou 450001, Henan Province, China; 3First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
  • Online:2017-03-28 Published:2017-03-31
  • Contact: Cheng Tian, M.D., Attending physician, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
  • About author:Zhou Da-kai, Master, Attending physician, Department of Spinal Surgery, Xinxiang Central Hospital, Xinxiang 453000, Henan Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. U1404313

摘要:

文章快速阅读:

文题释义:
Runx2:
属于转录因子Runx家族成员,是骨形态发生蛋白下游的重要调节因子,在骨形态发生蛋白诱导的骨再生中发挥重要作用。Runx2的表达受到多种参与成骨分化的因子调控。
脐血间充质干细胞:研究表明,脐血间充质干细胞在体外培养过程中不表达 CD14,CD34 和 CD45,而表达CD106,CD54,SH2,SH3 和 SH4。电子光学显微镜下观察可以看到脐血间充质干细胞中某些间质标记物表达阳性,如 SMA、波形蛋白、巢蛋白及结蛋白。脐血间充质干细胞还表达一种特殊的标记HOX,尤其是HOXA9,HOXB7,HOXC10及HOXD8,被称为间充质干细胞的“生物学指纹”,这是从脐血中分离间充质干细胞的特异性标记之一。

 

摘要
背景:
Runx2在成骨分化的信号途径中起核心作用,在诱导干细胞成骨分化及促进骨愈合方面具有重要的研究意义。
目的:观察Runx2基因高表达对脐血间充质干细胞成骨分化的影响。
方法:①扩增Runx2基因,利用腺病毒载体构建Runx2重组腺病毒(pAd-Runx2),检测病毒滴度后用重组腺病毒感染脐血间充质干细胞,并于荧光显微镜下观察荧光表达变化;②感染后1,3,7,14 d采用实时荧光定量PCR及Western blot检测脐血间充质干细胞Runx2、BMP-2、OCN、ALP的mRNA和蛋白表达。
结果与结论:①成功制备pAd-Runx2重组腺病毒,病毒滴度为1.7×1010 pfu/L;②Runx2重组腺病毒感染脐血间充质干细胞后细胞形态呈成骨样细胞改变,对照组细胞无明显变化;③感染组细胞Runx2、BMP-2、OCN、ALP mRNA和蛋白的表达量随感染时间的增加均有不同程度的上调;④结果表明,高表达Runx2基因腺病毒感染脐血间充质干细胞,能够上调BMP-2、OCN、ALP基因的表达,从而促进脐血间充质干细胞的成骨分化。

 

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: 0000-0003-2247-1922(程田)

关键词: 干细胞, 脐带脐血干细胞, 脐血间充质干细胞, 腺病毒载体, Runx2基因, 成骨分化, 国家自然科学基金

Abstract:

BACKGROUND: Runx2 plays a central role in osteogenic differentiation, which is of important significance in new bone formation.
OBJECTIVE: To observe the effect of Runx2 over-expression on osteogenic differentiation of human umbilical cord blood mesenchymal stem cells.
METHODS: Runx2 was generated by RT-PCR and the recombinant adenovirus (pAd-Runx2) was constructed. The viral titer was determined by air dilution method. After being transfected into human umbilical cord blood mesenchymal stem cells, the green fluorescence was observed under fluorescence microscope. Real-time fluorescent quantitative PCR and western blot were used to detect mRNA expression changes of osteogenesis related genes, Runx2, OCN, BMP-2, ALP, in human umbilical cord blood mesenchymal stem cells at 1, 3, 7 and 14 days after transfection.
RESULTS AND CONCLUSION: The recombinant adenovirus was successfully constructed and the titer was 1.7×1010 pfu/L. After infection by pAd-Runx2, human umbilical cord blood mesenchymal stem cells expressed green fluorescence protein clearly under the fluorescence microscope. Cells in the transfected group differentiated into osteoblast-like cells, and those in the control group stayed the same as pre-infected. The expression of Runx2, OCN, BMP-2 and ALP in the transfected group increased over time to some extent, but these changes were not detected in the control group. These findings indicate that Runx2 over-expression can promote the osteogenic differentiation of human umbilical cord blood mesenchymal stem cells.

 

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: Cord Blood Stem Cell Transplantation, Core Binding Factor Alpha 1 Subunit, Adenoviridae, Tissue Engineering

中图分类号: