中国组织工程研究 ›› 2026, Vol. 30 ›› Issue (19): 4926-4933.doi: 10.12307/2026.192

• 诱导性多能性干细胞Induced pluripotent stem cells • 上一篇    下一篇

DNA损伤激活的非编码RNA促进诱导多能干细胞衍生心肌细胞增殖并抑制凋亡

郇康辉,姜昱建,卞伟华   

  1. 滨州医学院药学院,山东省烟台市   264003
  • 收稿日期:2025-06-20 接受日期:2025-09-13 出版日期:2026-07-08 发布日期:2026-02-14
  • 通讯作者: 卞伟华,博士,教授,硕士生导师,滨州医学院药学院,山东省烟台市 264003
  • 作者简介:郇康辉,男,1999年生,山东省潍坊市人,汉族,滨州医学院在读硕士,主要从事心肌梗死与干细胞治疗的研究。
  • 基金资助:
    国家自然科学基金面上项目(82270305),项目负责人:卞伟华

Non-coding RNA-activated by DNA damage promotes proliferation and inhibits apoptosis of induced pluripotent stem cell-derived cardiomyocytes

Huan Kanghui, Jiang Yujian, Bian Weihua   

  1. Department of Pharmacy, Binzhou Medical University, Yantai 264003, Shandong Province, China
  • Received:2025-06-20 Accepted:2025-09-13 Online:2026-07-08 Published:2026-02-14
  • Contact: Bian Weihua, PhD, Professor, Master’s supervisor, Department of Pharmacy, Binzhou Medical University, Yantai 264003, Shandong Province, China
  • About author:Huan Kanghui, Master candidate, Department of Pharmacy, Binzhou Medical University, Yantai 264003, Shandong Province, China
  • Supported by:
    National Natural Science Foundation of China, No. 82270305 (to BWH)

摘要:

文题释义:

干细胞治疗:指利用干细胞特性,通过多种方式将干细胞或其衍生物应用于疾病治疗和组织修复的医学手段,干细胞为心肌梗死治疗带来了新的希望。
DNA损伤激活的非编码RNA:作为长链非编码RNA家族中的重要成员,参与维持基因组稳定和正常有丝分裂过程。

摘要
背景:细胞移植为心肌梗死治疗提供了一种有希望的方法,但较低的移植率限制了其应用。因此,促进移植细胞增殖,减少细胞凋亡,是提高治疗效果亟待解决的关键问题。
目的:探究DNA损伤激活的非编码RNA(non-coding RNA-activated by DNA damage,NORAD)对人诱导多能干细胞衍生心肌细胞增殖和氧糖剥夺/复氧诱导细胞凋亡的影响,以及移植过表达DNA损伤激活的非编码RNA的人诱导多能干细胞衍生心肌细胞对心肌梗死小鼠心功能的影响。
方法:RT-qPCR检测DNA损伤激活的非编码RNA在不同年龄(3 d龄和8周龄)小鼠心脏中的表达。通过包装过表达DNA损伤激活的非编码RNA的慢病毒和阴性对照病毒感染人诱导多能干细胞,进一步诱导分化获得过表达DNA损伤激活的非编码RNA和阴性对照的人诱导多能干细胞衍生心肌细胞,分别为实验组和对照组,通过RT-qPCR检测DNA损伤激活的非编码RNA的过表达效率;细胞免疫荧光检测增殖标志蛋白Ki67表达水平。利用氧糖剥夺/复氧法诱导细胞凋亡,流式细胞仪检测细胞内活性氧水平,Western blot检测细胞内Bax、Bcl-2和Cleaved Caspase-3蛋白表达水平。将过表达DNA损伤激活的非编码RNA的人诱导多能干细胞衍生心肌细胞移植到小鼠心肌梗死部位,4周后通过超声心动图评估心功能。
结果与结论:①DNA损伤激活的非编码RNA在3 d龄幼鼠心脏中的表达显著高于8周龄成年小鼠;②成功诱导人诱导多能干细胞分化为能够自发搏动的心肌细胞;③成功构建过表达DNA损伤激活的非编码RNA的人诱导多能干细胞衍生心肌细胞模型;④与对照组相比,过表达DNA损伤激活的非编码RNA的人诱导多能干细胞衍生心肌细胞中Ki67表达升高;⑤与对照组相比,过表达DNA损伤激活的非编码RNA抑制了氧糖剥夺/复氧诱导的人诱导多能干细胞衍生心肌细胞内活性氧产生,Bax和Cleaved Caspase-3蛋白表达降低,Bcl-2蛋白表达升高;⑥过表达DNA损伤激活的非编码RNA的人诱导多能干细胞衍生心肌细胞治疗显著改善了心肌梗死小鼠心脏功能。以上结果表明:过表达DNA损伤激活的非编码RNA促进人诱导多能干细胞衍生心肌细胞增殖,并减少氧糖剥夺/复氧诱导后人诱导多能干细胞衍生心肌细胞中活性氧产生,抑制细胞凋亡发生,从而增强人诱导多能干细胞衍生心肌细胞在心肌梗死小鼠中的修复能力。

关键词: 长链非编码RNA, 诱导多能干细胞, 心肌细胞, 氧糖剥夺/复氧, 细胞增殖, 心肌梗死, 凋亡, 细胞移植

Abstract: BACKGROUND: Although cell transplantation offers a promising approach for the treatment of myocardial infarction, the low transplantation rate limits its application. Therefore, promoting the proliferation of transplanted cells and reducing apoptosis are the key issues to be solved urgently to improve the therapeutic effect.
OBJECTIVE: To investigate the effects of non-coding RNA-activated by DNA damage (NORAD) on the proliferation of human induced pluripotent stem cell-derived cardiomyocytes and their apoptosis induced by oxygen-glucose deprivation/reoxygenation, as well as the effects of transplanting NORAD-overexpressing human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-NORADOECMs) on cardiac function in a murine model of myocardial infarction.
METHODS: The expression of NORAD in the hearts of mice at different ages (3 days old and 8 weeks old) was measured by real-time fluorescence quantitative polymerase chain reaction (RT-qPCR). A cellular model of hiPSC-NORADOECMs was established by infecting human induced pluripotent stem cells with a lentiviral vector designed to specifically upregulate NORAD, followed by directed differentiation. These cells were divided into a control group (infected with a control lentivirus) and an experimental group (infected with a NORAD-overexpressing lentivirus). The efficiency of NORAD overexpression was detected by RT-qPCR. The expression level of proliferation marker protein Ki67 was detected by cellular immunofluorescence. Intracellular reactive oxygen species levels were measured by flow cytometry after cell apoptosis was induced by oxygen-glucose deprivation/reoxygenation induction. The expression levels of Bcl-2-associated X protein (Bax), B-cell lymphoma 2 (Bcl-2), and cleaved caspase-3 were analyzed by western blot assay. hiPSC-NORADOECMs were transplanted into the infarcted area of the myocardial infarction mouse model. The cardiac function was evaluated by echocardiography four weeks later.
RESULTS AND CONCLUSION: (1) NORAD expression was significantly higher in the hearts of 3-day-old neonatal mice compared with 8-week-old adult mice. (2) The differentiation of human induced pluripotent stem cells into spontaneously contracting human induced pluripotent stem cell-derived cardiomyocytes was successfully achieved. (3) A stable human induced pluripotent stem cell-derived cardiomyocytes model overexpressing NORAD (hiPSC-NORADOECMs) was successfully established. (4) The expression of the proliferation marker Ki67 was significantly increased in the NORAD-overexpressing group compared with controls. (5) Compared with controls, NORAD overexpression reduced reactive oxygen species accumulation induced by oxygen-glucose deprivation/reoxygenation in human induced pluripotent stem cell-derived cardiomyocytes; Bax and cleaved caspase-3 levels were decreased, while Bcl-2 expression was upregulated. (6) Transplantation of hiPSC-NORADOECMs significantly enhanced cardiac function in a murine model of myocardial infarction. Collectively, these findings suggest that overexpression of the NORAD promotes the proliferation of human induced pluripotent stem cell-derived cardiomyocytes, reduces reactive oxygen species accumulation, and inhibits apoptosis following oxygen-glucose deprivation/reoxygenation induction, thereby enhancing the cardiac repair capacity of human induced pluripotent stem cell-derived cardiomyocytes in infarcted hearts. 

Key words: long non-coding RNA, induced pluripotent stem cell, cardiomyocyte, oxygen-glucose deprivation/reoxygenation, cell proliferation, myocardial infarction, apoptosis, cell transplantation

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