中国组织工程研究 ›› 2013, Vol. 17 ›› Issue (1): 31-37.doi: 10.3969/j.issn.2095-4344.2013.01.005

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

慢病毒载体介导的NEP1-40在人脐血间充质干细胞中的表达

黄爱华1,周逸丹1,张萍萍1,王赛英1,林媛媛1,葛婷爱1陈 赞2   

  1. 1杭州市第三人民医院,浙江省杭州市 310000
    2首都医科大学宣武医院神经外科,北京市 100053
  • 收稿日期:2012-09-23 修回日期:2012-11-19 出版日期:2013-01-01 发布日期:2013-01-01
  • 通讯作者: 陈赞,副主任医师,首都医科大学宣武医院神经外科,北京市 100053 chenzan66@163.com
  • 作者简介:黄爱华★,女,1982年生,浙江省杭州市人,汉族,2010年哈尔滨医科大学毕业,硕士,主要从事间充质干细胞的研究。 huang123_2002@163.com
  • 基金资助:

    国家高科技研究发展计划863项目(2006AA02A114);北京市科委科技计划资助(D07050701350703);北京市科技新星计划(2007B068)。

Expression of lentiviral vectors mediated NEP1-40 in mesenchymal stem cells fromhuman umbilical cord blood

Huang Ai-hua1, Zhou Yi-dan1, Zhang Ping-ping1, Wang Sai-ying1, Lin Yuan-yuan1, Ge Ting-ai1, Chen Zan2   

  1. 1 Third People’s Hospital of Hangzhou, Hangzhou 310000, Zhejiang Province, China
    2 Department of Neurosurgery, Xuanwu Hospital of Capital Medical University, Beijing 100053, China
  • Received:2012-09-23 Revised:2012-11-19 Online:2013-01-01 Published:2013-01-01
  • Contact: Chen Zan, Associate chief physician, Department of Neurosurgery, Xuanwu Hospital of Capital Medical University, Beijing 100053, Chinachenzan66@163.com
  • About author:Huang Ai-hua★, Master, Third People’s Hospital of Hangzhou, Hangzhou 310000, Zhejiang Province, Chinahuang123_2002@163.com
  • Supported by:

    863 Program of the National High-Tech Research and Development Program, No. 2006AA02A114*; a Grant from Beijing Committee of Science and Technology, No. D07050701350703*; Beijing Municipal Science and Technology New Star Program, No. 2007B068*

摘要:

背景:近年来研究证明间充质干细胞具有高度增殖和多向分化潜能,是一种理想的组织工程种子细胞,能高效转染表达外源性目的基因,在基因治疗领域具有广阔的应用前景。
目的:将含有NEP1-40基因的慢病毒载体转染脐血间充质干细胞,评价基因转染后脐血间充质干细胞生物学功能变化,观察NEP1-40在脐血间充质干细胞中的表达。
方法:体外分离和培养人脐血间充质干细胞,流式细胞仪检测细胞表面标记,并对其生物学特性进行鉴定。同时将NEP1-40基因克隆入慢病毒载体,包装出病毒上清,以不同拷贝数转染脐血间充质干细胞。
结果与结论:实验通过密度梯度离心法成功在体外分离和培养脐血间充质干细胞,诱导其向脂肪细胞分化,流式细胞仪检测结果显示脐血间充质干细胞中CD90、CD73及CD105蛋白阳性,不表达CD14、CD34、CD45、CD19、HLA-DR、Stro-1及CD106蛋白;real-time PCR检测发现其NEP1-40 mRNA表达水平与转染拷贝数有关,转染拷贝数越高,NEP1-40的表达量越高,此外转染NEP1-40后的脐血间充质干细胞中可检测到NEP1-40蛋白,提示NEP1-40基因转染后脐血间充质干细胞原有的生物学功能无明显影响。

关键词: 干细胞, 脐带脐血干细胞, 脐血, 间充质干细胞, 慢病毒载体, 转染, NEP1-40, 863项目, 干细胞图片文章

Abstract:

BACKGROUND: In recent years, studies have shown that mesenchymal stem cells are ideal seed cells used fortissue engineering because of their strong proliferation and multi-differentiation potential. Mesenchymal stem cells can be efficiently transfected and expressed exogenous gene, and therefore they have broad application prospects in gene therapy.
OBJECTIVE: NEP1-40 gene-containing lentiviral vectors were transfected into umbilical cord blood-derived mesenchymal stem cells to evaluate the biological function changes of mesenchymal stem cells and detect NEP1-40 expression in umbilical cord blood-derived mesenchymal stem cells.
METHODS: Human umbilical cord blood-derived mesenchymal stem cells were isolated and cultured in vitro. Cell surface markers were detected by flow cytometry, and their biological characteristics were identified. NEP1-40 gene was cloned into the lentiviral vector and lentiviral supernatant was packaged. Then umbilical cord blood-derived mesenchymal stem cells were transfected with different multiplicities of infection.
RESULTS AND CONCLUSIONS: We successfully isolated and cultured human umbilical cord blood-derived mesenchymal stem cells in vitro by density gradient centrifugation method, and the cells could be induced to differentiate into adipocytes. Flow cytometry results showed that umbilical cord blood-derived mesenchymal stem cells were positive for CD90, CD73 and CD105 protein, but they were negative for CD14, CD34, CD45, CD19, HLA-DR, Stro-1 and CD106 protein. Real-time PCR detection showed that the NEP1-40 mRNA expression level was positively correlated with multiplicity of infection. Higher multiplicity of infection yielded higher NEP1-40 expression. In addition, NEP1-40 protein expression could be seen in human umbilical cord blood-derived mesenchymal stem cells after transfected with NEP1-40. These findings suggest that the transfection of NEP1-40 gene has little impact on biological function of human umbilical cord blood-derived mesenchymal stem cells.

Key words: stem cells, umbilical cord blood-derived stem cells, cord blood, mesenchymal stem cells, lentiviral vectors, transfection, NEP1-40, 863 program, stem cell photographs-containing paper

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