中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (41): 6585-6590.doi: 10.3969/j.issn.2095-4344.2014.41.005

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

携带CXCR4基因慢病毒载体转染大鼠骨髓间充质干细胞的体外实验

曹志强,王 阳,刘 龙   

  1. 解放军沈阳军区总医院泌尿男科,辽宁省沈阳市 110840
  • 修回日期:2014-09-18 出版日期:2014-10-01 发布日期:2014-10-01
  • 通讯作者: 刘龙,硕士,主任医师,解放军沈阳军区总医院泌尿男科,辽宁省沈阳市 110840
  • 作者简介:曹志强,男,1977年生,黑龙江省双城市人,博士,副主任医师,主要从事干细胞应用和肾移植方面的研究。
  • 基金资助:

    辽宁省自然科学基金项目(2013020199)

Recombinant CXCR4 gene lentivirus transfection of rat bone marrow mesenchymal stem cells in vitro  

Cao Zhi-qiang, Wang Yang, Liu Long   

  1. Department of Urinary, General Hospital of Shenyang Military Command, Shenyang 110840, Liaoning Province, China
  • Revised:2014-09-18 Online:2014-10-01 Published:2014-10-01
  • Contact: Liu Long, Master, Chief physician, Department of Urinary, General Hospital of Shenyang Military Command, Shenyang 110840, Liaoning Province, China
  • About author:Cao Zhi-qiang, M.D., Associate chief physician, Department of Urinary, General Hospital of Shenyang Military Command, Shenyang 110840, Liaoning Province, China
  • Supported by:

    the Natural Science Foundation of Liaoning Province, No. 2013020199

摘要:

背景:间充质干细胞在体内归巢主要调控因子是CXCR4,如何提高干细胞自身CXCR4的表达量是调节干细胞体内靶器官归巢能力的关键。

目的:构建CXCR4或GFP基因慢病毒表达载体,并观察其对骨髓间充质干细胞自身生长特性及分泌功能的影响。
方法:骨髓间充质干细胞应用慢病毒载体转染系统转染CXCR4基因达到过表达,同时单独转GFP基因作为对照。通过荧光显微镜、RT-PCR、免疫蛋白印迹方法验证病毒转染效率;流式细胞技术测定骨髓间充质干细胞的增殖、凋亡情况;Western Blot法测定间充质干细胞培养基上清中分泌蛋白及细胞因子变化。
结果与结论:慢病毒转染系统可以安全、有效地转染CXCR4基因或GFP基因到骨髓间充质干细胞。流式细胞仪检测显示过表达CXCR4的骨髓间充质干细胞增殖能力、生存能力加强,凋亡细胞减少(P < 0.05);细胞上清蛋白分析提示过表达CXCR4后,骨髓间充质干细胞培养上清内出现很多的蛋白因子升高(P < 0.05),其中大多数对细胞自身复制及免疫调节有益。结果表明慢病毒转染是一种安全高效的基因修饰手段,可以通过CXCR4基因修饰的方法提高骨髓间充质干细胞的生存能力、降低凋亡率,调节细胞保护性因子及免疫调节因子的分泌功能。

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


全文链接:

关键词: 干细胞, 骨髓干细胞, 慢病毒, 骨髓间充质干细胞, CXCR4, 细胞增殖, 免疫调节因子, 辽宁省自然科学基金

Abstract:

BACKGROUND: Chemokine receptor 4 (CXCR4) is the main homing regulating factor for mesenchymal stem cells in vivo. How to improve the self-expression of CXCR4 is crucial for regulating the homing ability of stem cells in vivo targeting organs.

OBJECTIVE: To construct lentiviral vectors carrying CXCR4 or green fluorescent protein (GFP) gene, and to observe their effects on growth and secrete function of bone marrow mesenchymal stem cells.
METHODS: Lentiviral vectors were used to over-express CXCR4 in rat bone marrow mesenchymal stem cells. GFP gene was transfected as a control. Transfection efficiency was analyzed using fluorescence microscopy, RT-PCR and western blot assay for detecting the expression of CXCR4 or GFP in cells at both the mRNA and protein levels. Effects of CXCR4 expression modified on the cellular proliferation of bone marrow mesenchymal stem cells were assayed with flow cytometry. Effect of CXCR4 regulation on secretion function of bone marrow mesenchymal stem cells was determined by protein analysis from cell supernatant.
RESULTS AND CONCLUSION: CXCR4 gene or GFP gene could be transfected into bone marrow mesenchymal stem cells safely and effectively with lentivirus transfection system. Analysis of CXCR4 expression at the mRNA and protein levels confirmed the transfection efficiency. Effects of CXCR4 over-expression on the cellular proliferation of bone marrow mesenchymal stem cells and effects of CXCR4 regulation on secretion of protective factors from bone marrow mesenchymal stem cells were improved. The proliferation ability of bone marrow mesenchymal stem cells with CXCR4 over-expression was improved, which was approved with flow cytometry (P < 0.05). And it was helpful for bone marrow mesenchymal stem cells to secrete some protective factors. Many protein and soluble factors were at higher levels, and those were good at cells proliferation and immunoloregulation in bone marrow mesenchymal stem cells (P < 0.05). The method of lentiviral transfection is a safe and effective way to modify bone marrow mesenchymal stem cells. We can improve the ability of bone marrow mesenchymal stem cells in the survival and emiocytosis ability through genetic engineering.

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


全文链接:

Key words: bone marrow, mesenchymal stem cells, lentivirus, receptors, CXCR4

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