中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (1): 40-44.doi: 10.12307/2022.007

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

乙醛脱氢酶3B1在人骨髓间充质干细胞自然衰老过程中的表达

麦丽萍,何国东,陈少贤,朱杰宁,侯兴华,张梦珍,李晓红   

  1. 广东省人民医院,广东省医学科学院医学研究部,广东省华南结构性心脏病重点实验室,广东省广州市  510080
  • 收稿日期:2021-01-06 修回日期:2021-01-08 接受日期:2021-02-18 出版日期:2022-01-08 发布日期:2021-10-23
  • 通讯作者: 李晓红,副研究员,广东省人民医院,广东省医学科学院医学研究部,广东省华南结构性心脏病重点实验室,广东省广州市 510080
  • 作者简介:麦丽萍,女,1985 年生,广东省广州市人,汉族,硕士,主管技师,主要从事药理学相关研究。
  • 基金资助:
    广东省医学科学技术研究基金项目(A2019287),项目负责人:麦丽萍;广东省自然科学基金项目 (2018A0303130266),项目负责人:李晓红

Expression of aldehyde dehydrogenase 3B1 during human bone marrow mesenchymal stem cells senescence

Mai Liping, He Guodong, Chen Shaoxian, Zhu Jiening, Hou Xinghua, Zhang Mengzhen, Li Xiaohong   

  1. Department of Medical Research, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangzhou 510080, Guangdong Province, China
  • Received:2021-01-06 Revised:2021-01-08 Accepted:2021-02-18 Online:2022-01-08 Published:2021-10-23
  • Contact: Li Xiaohong, Associate researcher, Department of Medical Research, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangzhou 510080, Guangdong Province, China
  • About author:Mai Liping, Master, Technician-in-charge, Department of Medical Research, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangzhou 510080, Guangdong Province, China
  • Supported by:
    Guangdong Medical Science and Technology Research Fund in China, No. A2019287 (to MLP); the Natural Science Foundation of Guangdong in China, No. 2018A0303130266 (to LXH)

摘要:

文题释义:
干细胞自然衰老:干细胞具有多能分化和自我更新、损伤修复能力,但其与体细胞一样,在自然增殖过程中会出现衰老,再生能力会随着细胞的衰老而降低,甚至出现功能失调的现象。
细胞衰老:细胞停留在细胞周期G0/G1期,并且无法进入S期,使细胞增殖、分化功能发生衰退的现象。

背景:人骨髓间充质干细胞在体外培养传代过程中存在着细胞老化现象,但其机制尚不明确。乙醛脱氢酶3B1具有抗氧化应激的作用,且氧化应激是导致细胞衰老的重要因素之一。乙醛脱氢酶3B1的表达异常是否与人骨髓间充质干细胞衰老相关尚未见报道。
目的:观察乙醛脱氢酶3B1在人骨髓间充质干细胞衰老过程的表达变化,为探讨干细胞的衰老机制提出新研究方向。
方法:建立人骨髓间充质干细胞自然衰老模型并进行鉴定,Bisulfit甲基化检测衰老前后的乙醛脱氢酶3B1基因表达变化,采用RT-qPCR、免疫荧光和Western blot检测乙醛脱氢酶3B1的mRNA和蛋白表达变化。
结果与结论:①人骨髓间充质干细胞传代扩增培养,β-半乳糖苷酶染色显示阳性细胞不断增多,传至第7-13代时,阳性细胞最为明显;②甲基化测序显示第16代人骨髓间充质干细胞中乙醛脱氢酶3B1的表达下调;③在人骨髓间充质干细胞体外传代过程中乙醛脱氢酶3B1的mRNA和蛋白表达均下调;④结果表明,乙醛脱氢酶3B1在人骨髓间充质干细胞自然衰老中表达下调,但其作用机制还需进一步研究。
https://orcid.org/0000-0001-8644-2376(麦丽萍) 

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

关键词: 干细胞, 骨髓间充质干细胞, 细胞衰老, 自然衰老, 乙醛脱氢酶3B1, 模型

Abstract: BACKGROUND: Human bone marrow mesenchymal stem cells have the phenomenon of cell aging during passage in vitro, but the mechanism by which it occurs is not yet clear. Aldehyde dehydrogenase 3B1 has antioxidant effect. Oxidative stress is one of the important factors leading to cell senescence. Whether the expression level of aldehyde dehydrogenase 3B1 is related to human bone marrow mesenchymal stem cells senescence is still unclear.
OBJECTIVE: To observe the expression of aldehyde dehydrogenase 3B1 in cellular senescence, providing a new research direction for aging mechanism of stem cells.  
METHODS: The natural senescent model of human bone marrow mesenchymal stem cells was established and identified. The mRNA expression of aldehyde dehydrogenase 3B1 in human bone marrow mesenchymal stem cells was detected by bisulfite methylation sequencing and real-time qPCR. The protein level of aldehyde dehydrogenase 3B1 was detected by immunofluorescence and western blot assay.  
RESULTS AND CONCLUSION: (1) Human bone marrow mesenchymal stem cells were cultured in subculture. β-Galactosidase staining showed that positive cells increased continuously, and the positive cells were the most obvious at passage 7 to 13. (2) Methylation sequencing showed that in passage 16 human bone marrow mesenchymal stem cells, the methylation level of aldehyde dehydrogenase 3B1 was down regulated. (3) The mRNA and protein levels of aldehyde dehydrogenase 3B1 were down regulated during the passage of human bone marrow mesenchymal stem cells in vitro. (4) The results show that aldehyde dehydrogenase 3B1 is down regulated in the natural senescence of human bone marrow mesenchymal stem cells, but its mechanism needs further study.

Key words: stem cells, bone marrow mesenchymal stem cells, cellular senescence, natural senescence, aldehyde dehydrogenase 3B1, model

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