华西口腔医学杂志 ›› 2018, Vol. 36 ›› Issue (2): 190-193.doi: 10.7518/hxkq.2018.02.014

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过表达骨形态发生蛋白-4对小鼠诱导性多能干细胞生物学活性的影响

裘今1(), 张慧宇1, 刘丽2, 谭颖徽1()   

  1. 1.陆军军医大学新桥医院口腔科,重庆 400037
    2.中国人民解放军总医院口腔科,北京 100853
  • 收稿日期:2017-09-16 修回日期:2017-12-09 出版日期:2018-04-10 发布日期:2018-04-10
  • 作者简介:

    裘今,硕士,E-mail:329545064@qq.com

  • 基金资助:
    国家自然科学基金(31400841)

Effect of bone morphogenetic protein-4 overexpression on the biological activity of mouse induced pluripotent stem cells

Jin Qiu1(), Huiyu Zhang1, Li Liu2, Yinghui Tan1()   

  1. 1. Dept. of Stomatology, Xinqiao Hospital, The Third Military Medical University, Chongqing 400037, China
    2. Dept. of Stomatology, Chinese PLA General Hospital, Beijing 100853, China
  • Received:2017-09-16 Revised:2017-12-09 Online:2018-04-10 Published:2018-04-10
  • Supported by:
    Supported by: The National Natural Science Foundation of China (31400841).

摘要:

目的 构建过表达骨形态发生蛋白-4(BMP4)基因的慢病毒载体,探讨其过表达后对小鼠诱导性多能干细胞(iPS)生物学活性的影响。方法 采用慢病毒转染建立稳定过表达BMP4的iPS细胞株(BMP4过表达组),未作任何转染的细胞为空白组,转染慢病毒阴性对照组的细胞为空载体组。CCK8检测各组细胞增殖活性,碱性磷酸酶(ALP)活性检测细胞分化程度,荧光定量聚合酶链反应检测BMP4、成釉细胞蛋白(AMBN)、细胞角蛋白(CK)14、牙本质涎磷蛋白(DSPP)、骨唾液酸蛋白(BSP)及骨细胞特异转录因子Runx2的mRNA表达。结果 与空白组及空载体组相比,BMP4过表达组的细胞增殖活性及ALP活性升高(P<0.05),Runx2、AMBN、CK14、DSPP、BSP mRNA的表达增加(P<0.05)。结论 BMP4基因能够促进iPS的牙向分化。

关键词: 骨形态发生蛋白-4, 诱导性多能干细胞, 牙向分化, 增殖

Abstract:

Objective This study aimed to construct the expression of bone morphogenetic protein-4 (BMP4) lentiviral vector gene and explore its influence on the biological activity of mouse induced pluripotent stem (iPS) cells. Methods iPS cell lines stably overexpressing BMP4 were constructed by lentivirus transfection (BMP4-overexpressing group). Cells without transfection served as the blank group, and cells with only vector transfection served as the empty-vector group. Cell prolifera-tion was detected by CCK8, and the expression levels of ameloblastin (AMBN), cytokeratin (CK) 14, dentin sialophospho-protein (DSPP), bone sialoprotein (BSP), and Runx2 mRNA were detected by quantitative polymerase chain reaction. Alkaline phosphatase (ALP) activity was used to detect the degree of cell differentiation. Results Compared with blank and empty-vector groups, proliferation activity and ALP activity of BMP4-overexpressing group obvious increased (P<0.05), BMP4, AMBN, CK14, DSPP, BSP, Runx2 mRNA expression also increased (P<0.05). Conclusion BMP4 can significantly promote the odontogenic differentiation of iPS.

Key words: bone morphogenetic protein-4, induced pluripotent stem cells, odontogenic differentiation, proliferation

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