中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (37): 5967-5971.doi: 10.3969/j.issn.2095-4344.2014.37.011

• 造血干细胞 hematopoietic stem cells • 上一篇    下一篇

在三丁基过氧化氢体外诱导造血干/祖细胞衰老中的SIRT6/NF-κB信号轴

周  玥1,王亚平2,王建伟2,丁继超1,杨勇琴1   

  1. 1大理学院组织学与胚胎学教研室,云南省大理市  671000
    2重庆医科大学干细胞与组织工程研究室,组织学与胚胎学教研室,重庆市  400016
  • 修回日期:2014-08-03 出版日期:2014-09-03 发布日期:2014-09-03
  • 作者简介:周玥,女,1979年生,云南省大理市人,白族,2011年重庆医科大学毕业,博士,副教授,主要从事干细胞生物学,中药药理学研究。
  • 基金资助:

    国家自然科学基金(81202785,81173398)

Effect of SIRT6/NF-kappa B signal axis during hematopoietic stem and progenitor cell senescence induced by tert-butylhydroperoxide in vitro

Zhou Yue1, Wang Ya-ping2, Wang Jian-wei2, Ding Ji-chao1, Yang Yong-qin1   

  1. 1Department of Histology and Embryology, Dali University, Dali 671000, Yunnan Province, China
    2Laboratory of Stem Cells and Tissue Engineering, Department of Histology and Embryology, Chongqing Medical University, Chongqing 400016, China
  • Revised:2014-08-03 Online:2014-09-03 Published:2014-09-03
  • About author:Zhou Yue, M.D., Associate professor, Department of Histology and Embryology, Dali University, Dali 671000, Yunnan Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81202785, 81173398

摘要:

背景:SIRT6/NF-κB信号轴是细胞衰老的调控通路,但其在造血干/祖细胞(hematopoietic stem and progenitor cell,HSC/HPC)衰老中的作用尚不清楚。
目的:探讨SIRT6/NF-κB信号通路在三丁基过氧化氢体外诱导造血干/祖细胞衰老中的作用。
方法:免疫磁性分选法分离、纯化小鼠Sca-1+ HSC/HPC。用100 μmol/L三丁基过氧化氢体外诱导Sca-1+ HSC/HPC构建体外衰老模型,通过衰老相关β-半乳糖苷酶细胞化学染色、流式细胞术分析细胞周期、造血祖细胞混合集落培养确定三丁基过氧化氢诱导Sca-1+HSC/HPC衰老的生物学作用。荧光定量PCR及Western blotting检测衰老调控分子SIRT6、NF-κB mRNA及蛋白的表达。
结果与结论:与对照组比较,衰老组Sca-1+ HSC/HPC β-半乳糖苷酶染色阳性细胞数、G0/G1期细胞比例增高,形成造血祖细胞混合集落数量减少;SIRT6 mRNA及蛋白表达下调,NF-κB mRNA及蛋白表达上调。结果表明三丁基过氧化氢可能通过调控SIRT6/NF-κB信号通路发挥诱导Sca-1+HSC/HPC衰老作用。


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


全文链接:

关键词: 干细胞, 造血干细胞, 三丁基过氧化氢, 造血干/祖细胞, 衰老, SIRT6, NF-κB, 国家自然科学基金

Abstract:

BACKGROUND: SIRT6/NF-κB is the important signal axis to cell senescence, but the effect of SIRT6/NF-κB signal axis to hematopoietic stem and progenitor cell (HSC/HPC) senescence is unclear.
OBJECTIVE: To induce (t-BHP) in vitro and to investigate the role of SIRT6/NF-κB signal axis in Sca-1+ HSC/HPC senescence induced by tert-butylhydroperoxide in vitro.
METHODS: Sca-1+HSC/HPC was isolated and purified by magnetic activated cell sorting. Sca-1+ HSC/HPC senescence was induced by 100 μmol/L tert-butylhydroperoxide in vitro. The senescence-associated β-Galactosidase staining, cell cycle analysis and culture of mixed hematopoietic progenitor cell were used to investigate the biological effects of tert-butylhydroperoxide on Sca-1+ HSC/HPC senescence. The expression of senescence associated SIRT6, NF-κB mRNA and protein was examined by real-time fluorescence quantitative PCR and western blot assay.
RESULTS AND CONCLUSION: Compared with control group, the percentage of positive cells expressing SA-β-Gal and cells in G0/G1 phase increased and the number of forming colony of mixed hematopoietic progenitor decreased in the aging group. It showed lower expression of SIRT6 and higher expression of NF-κB in the aging group. The SIRT6/NF-κB signal axis may play a key role in the Sca-1+ HSC /HPC senescence inducted by tert-butylhydroperoxide.


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


全文链接:

Key words: hematopoietic stem cells, tert-butylhydroperoxide, aging, NF-kappa B

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