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中国应用生理学杂志 ›› 2018, Vol. 34 ›› Issue (4): 360-363.doi: 10.12047/j.cjap.5584.2018.082

• 研究论文 • 上一篇    下一篇

HDAC4基因甲基化对hMSCs向汗腺样细胞诱导转分化的影响

赵换军1, 丁路1, 付潇潇1, 王慧英1, 张翠萍2   

  1. 1. 首都医科大学附属北京潞河医院, 北京 101100;
    2. 解放军总医院第一附属医院全军创伤修复与组织再生重点实验室, 北京 100048
  • 收稿日期:2017-03-14 修回日期:2018-06-20 出版日期:2018-07-28 发布日期:2019-02-21
  • 通讯作者: 张翠萍 E-mail:zcp666666@sohu.com
  • 基金资助:
    国家自然科学基金面上资助项目(81121004,81230041)

DNA methylation of HDAC4 gene affects the trans-differentiation process of hMSCs into sweat gland like cells

ZHAO Huan-jun1, DING Lu1, FU Xiao-xiao1, WANG Hui-ying1, ZHANG Cui-ping2   

  1. 1. Department of Burn and Plastic Surgery, Beijing Luhe Hospital of the Capital Medical University, Beijing 101100;
    2. Wound Healing and Cell Biology Laboratory, The First Affiliated Hospital of General Hospital of PLA, Beijing 100048, China
  • Received:2017-03-14 Revised:2018-06-20 Online:2018-07-28 Published:2019-02-21
  • Supported by:
    国家自然科学基金面上资助项目(81121004,81230041)

摘要: 目的:探讨在诱导人骨髓间充质干细胞(hMSCs)转分化为汗腺样细胞过程中,组蛋白去乙酰化酶4(HDAC4)甲基化的改变及其对诱导转分化过程的影响。方法:选取人骨髓间充质干细胞系体外培养、扩增后,取第三代hMSCs与热休克处理的汗腺细胞进行Transwell+诱导因子的共培养。收集诱导后实验组的汗腺样细胞和同期对照组的hMSCs,采用甲基化特异性PCR(MSP)和飞行质谱(Mass Array)法检测HDAC4基因启动子区CpG岛甲基化状态的变化,随后采用甲基化抑制剂5-氮杂-2'-脱氧胞苷(5-aza-CdR,10 μmol/L)处理实验组hMSCs,对照组为同期培养的hMSCs,RT-PCR测定两组细胞HDAC4基因和癌胚抗原(CEA)基因的mRNA表达量。结果:诱导前hMSCs中HDAC4基因整体甲基化水平较高,探针cg2463009处CpG位点甲基化程度为0.901,诱导转分化后汗腺样细胞中HDAC4基因整体甲基化水平下降37%,甲基化程度为0.531;探针cg14823429处CpG位点甲基化程度由诱导前的0.687下降到0.386。5-aza-CdR处理48 h后,实验组HDAC4基因mRNA表达水平上调,与诱导转分化相关的CEA mRNA同期表达量也增强,与对照组相比差异有统计学意义(P<0.05)。结论:HDAC4基因的甲基化参与了hMSCs转分化为汗腺样细胞过程的调控。

关键词: 人骨髓间充质干细胞, 汗腺样细胞, 组蛋白去乙酰化酶4基因, DNA甲基化

Abstract: Objective: To investigate the changesof DNA methylation in histone deacetylases 4 gene (HDAC4) and its effectduring the trans-differentiation process of human mesenchymal stem cells (hMSCs) into sweat gland like cells (SGLCs). Methods: Selected cell lines of human mesenchymal stem cells (hMSCs) were cultured and expended in vitro, the third generation ofhMSCs and heat-shocked sweat gland cells were picked up, and were co-culturedwith adding inducible factor in the transwell chamber. The sweat gland like cells (SGLCs)in experiment group and the hMSCs in control group were collected, the changes of DNA methylation degree of CpG dinucleotide sitesin histone deacetylases 4 gene (HDAC4) promotor were detected by methylation specific PCR (MSP)andMaldi-TOF Mass Array. And then, the hMSCs in experiment group were treated with 5-aza-CdR (5-aza-2-deoxycytidine, 10 μmol/L), while the hMSCsin control group were culturedwith PBS at the same time. ThemRNA expressions of HDAC4 gene and carcino-embryonic antigen (CEA)gene in the two groups were measured by RT-PCR. Results: The methylation of HDAC4gene in hMSCs was in high level before induction, the methylation degreeof CpG dinucleotide sites located in cg2463009 was 0.901, and the methylation degree of HDAC4gene in SGLCs was markedly decreased by 37% after induction, which was 0.531. The methylationlevel of CpG dinucleotide sites located in cg14823429was changed from 0.687to 0.386 after induction. The mRNA expression of HDAC4 gene was upregulated in test group after treated with 5-aza-CdR for 48 hours, the mRNA expression of CEA gene related with transdifferentiation was enhanced too at the same term, there was significantly statistic difference compared with control group (P<0.05). Conclusion: Methylation of HDAC4 gene participates in the regulation of the trans-differentiation of hMSCs into sweet gland like cells.

Key words: human mesenchymal stem cells, sweet gland like cells, histonedeacetylases 4 gene, DNAmethylation

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