基础医学与临床 ›› 2018, Vol. 38 ›› Issue (1): 13-19.

• 研究论文 • 上一篇    下一篇

Akt在Islet-1促C3H10T1/2向心肌细胞特异分化过程中的作用

赖星宇,朱静,田杰,易勤,陈雪妮   

  1. 重庆医科大学附属儿童医院
  • 收稿日期:2016-12-01 修回日期:2017-03-21 出版日期:2018-01-05 发布日期:2017-12-26
  • 通讯作者: 朱静
  • 基金资助:
    Islet-1与Akt竞争破解MSCs干性促其心肌细胞特化机制研究;MSCs向心肌细胞分化中特异基因的DNA甲基化/组蛋白乙酰化交互调控作用

Role of Akt during Islet-1 inducing C3H10T1/2 cells to differentiate specifically into cardiomyocytes

  • Received:2016-12-01 Revised:2017-03-21 Online:2018-01-05 Published:2017-12-26

摘要: 目的 研究Akt在Islet-1诱导间充质干细胞C3H10T1/2向心肌细胞特异分化过程的作用以及机制。方法 构建过表达Islet-1细胞模型;流式检测转染效率;CCK-8检测细胞增殖;Western blot检测Islet-1、cTnT和p-Akt/T-Akt蛋白表达;RT-qPCR检测心肌早期特异转录因子GATA4、Nkx2.5和Mef2c mRNA表达。 结果 随着MK-2206(Akt抑制剂)浓度的增加,细胞增殖抑制率升高(P<0.05),对Akt活性的最佳抑制浓度为8 nmol/L;随着Islet-1诱导分化时间的延长,感染细胞的p-Akt/T-Akt蛋白表达降低(P<0.05),心肌特异转录因子GATA4、Nkx2.5和Mef2c基因的表达升高(P<0.05);而经MK-2206处理的感染细胞,GATA4、Nkx2.5和Mef2c基因的表达在第1周时出现明显升高后又逐渐降低(P<0.05)。结论 Akt在Islet-1诱导间充质干细胞C3H10T1/2向心肌细胞特异分化过程中于不同分化阶段发挥着不同的调节作用。

关键词: Islet-1, Akt, MK-2206, 间充质干细胞, 心肌细胞

Abstract: Objective To study the effect and mechanism of Akt during Islet-1 inducing the mesenchymal stem cells of C3H10T1/2 cells to differentiate specifically into cardiomyocytes. Methods Constructing the model of Islet-1 over-expression cells, Lentivirus transfection efficiency of cells was detected by flow cytometry detection technology. Cell proliferation was tested by CCK-8. The protein expressions of Islet-1,cTnT and p-Akt/T-Akt were measured by Western blot. The mRNA expression of GATA4,Nkx2.5 and Mef2c were tested by real-time PCR. Results With the increasing of MK – 2206 concentration, the inhibition rate of cell proliferation increased(P<0.05), and the best inhibition concentration of Akt was 8 nmol/L; With prolongation of Islet-1 inducing time,the protein expression of p-Akt/T-Akt reduced(P<0.05);The gene expression of myocardial specific transcription factor GATA4, Nkx2.5 and Mef2c increased(P<0.05);treated with MK-2206, the gene expression of GATA4, Nkx2.5 and Mef2c increased significantly at the first week and then reduced(P<0.05). Conclusions Akt plays different effects in different differentiation stages during the Islet-1 inducing the cells into cardiac-specific differentiation process.

Key words: islet-1, Akt, MK-2206, mesenchymal stem cells, cardiomyocyte

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