中国组织工程研究 ›› 2023, Vol. 27 ›› Issue (28): 4513-4518.doi: 10.12307/2023.500

• 骨组织构建 bone tissue construction • 上一篇    下一篇

长链非编码RNA H19抑制地塞米松致成骨细胞凋亡的作用

杨慧霞1,2,白志刚2,3,迟宏扬1,2,马天龙2,4,马胜超2,4,姜怡邓2,4   

  1. 宁夏医科大学,1临床医学院,4基础医学院,宁夏回族自治区银川市  750004;2国家卫生健康委代谢性心血管疾病研究重点实验室,宁夏回族自治区银川市  750004;3宁夏回族自治区人民医院,宁夏回族自治区银川市  750004
  • 收稿日期:2022-06-28 接受日期:2022-08-19 出版日期:2023-10-08 发布日期:2023-01-29
  • 通讯作者: 姜怡邓,博士,教授,宁夏医科大学基础医学院,宁夏回族自治区银川市 750004;国家卫生健康委代谢性心血管疾病研究重点实验室,宁夏回族自治区银川市 750004 马胜超,博士,副教授,宁夏医科大学基础医学院,宁夏回族自治区银川市 750004;国家卫生健康委代谢性心血管疾病研究重点实验室,宁夏回族自治区银川市 750004
  • 作者简介:杨慧霞,女,1996 年生,宁夏回族自治区彭阳县人,汉族,宁夏医科大学在读硕士,主要从事激素性股骨头坏死方面的研究。
  • 基金资助:
    宁夏回族自治区重点研发计划项目(2020BFH02001),项目负责人:白志刚;国家自然科学基金(82060412),项目负责人:白志刚;中国医学科学院中央级公益性科研院所基本科研业务费项目(2019PT330002),项目负责人:姜怡邓

Effects of long non-coding RNA H19 on apoptosis of osteoblasts induced by dexamethasone

Yang Huixia1, 2, Bai Zhigang2, 3, Chi Hongyang1, 2, Ma Tianlong2, 4, Ma Shengchao2, 4, Jiang Yideng2, 4   

  1. 1Clinical School of Medicine, 4Basic School of Medicine, Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China; 2National Health Commission Key Laboratory of Metabolic Cardiovascular Disease Research, Yinchuan 750004, Ningxia Hui Autonomous Region, China; 3Peoples Hospital of Ningxia Hui Autonomous Region, Yinchuan 750004, Ningxia Hui Autonomous Region, China
  • Received:2022-06-28 Accepted:2022-08-19 Online:2023-10-08 Published:2023-01-29
  • Contact: Jiang Yideng, MD, Professor, National Health Commission Key Laboratory of Metabolic Cardiovascular Disease Research, Yinchuan 750004, Ningxia Hui Autonomous Region, China; Basic School of Medicine, Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China Ma Shengchao, MD, Associate professor, National Health Commission Key Laboratory of Metabolic Cardiovascular Disease Research, Yinchuan 750004, Ningxia Hui Autonomous Region, China; Basic School of Medicine, Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China
  • About author:Yang Huixia, Master candidate, Clinical School of Medicine, Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China; 2National Health Commission Key Laboratory of Metabolic Cardiovascular Disease Research, Yinchuan 750004, Ningxia Hui Autonomous Region, China
  • Supported by:
    Key Research and Development Program Project of Ningxia Hui Autonomous Region, No. 2020BFH02001 (to BZG); National Natural Science Foundation of China, No. 82060412 (to BZG); the Fundamental Research Funds for Central-level Public Welfare Research Institutes of Chinese Academy of Medical Sciences, No. 2019PT330002 (to JYD)

摘要:

文题释义:

凋亡:是一种程序性细胞死亡,其特征是进行性的核和细胞质收缩、染色质浓缩和凋亡小体形成。凋亡是半胱氨酸蛋白酶不可逆有限水解底物的级联反应过程,一旦激活可导致细胞死亡。最常见的凋亡指标为Bcl-2和Bax,Bcl-2降低,Bax增高,细胞凋亡增加。
长链非编码RNA(lncRNA):是长度大于200 nt不编码蛋白的非编码RNA,其广泛参与生物进化、胚胎发育、物质代谢以及肿瘤发生等多种生命活动的调控,并在细胞生长、增殖、自噬及凋亡等生命活动中具有重要的调节作用。

背景:激素性股骨头坏死的发病机制尚不清楚,成骨细胞凋亡与其关系密切。
目的:探讨长链非编码RNA H19(long Non-Coding RNA H19,lncRNA H19)在地塞米松促进成骨细胞凋亡中的作用。
方法:培养小鼠成骨细胞MC3T3-E1,分为对照组(不处理)和地塞米松组(1 μmol/L 地塞米松处理24 h),采用Western blot检测各组细胞Bax、Bcl-2和细胞外调节蛋白激酶(p-ERK1/2/ERK1/2)蛋白的表达,流式细胞术和细胞活力染色检测细胞凋亡情况,qRT-PCR检测lncRNA H19的表达。转染lncRNA H19阴性对照(ad-NC)和lncRNA H19过表达质粒(ad-lncRNA H19)并给予地塞米松干预24 h后,采用细胞活力染色、Western blot和流式细胞术检测MC3T3-E1细胞凋亡情况;使用MAPK-ERK通路抑制剂PD98059处理MC3T3-E1细胞24 h,Western blot检测各组细胞Bax和Bcl-2蛋白的表达。 

结果与结论:①与对照组相比,地塞米松组MC3T3-E1细胞凋亡率升高,lncRNA H19相对表达降低(P < 0.01),MAPK/ERK信号通路被抑制;②上调MC3T3-E1细胞lncRNA H19后,细胞凋亡率降低(P < 0.01),MAPK/ERK信号通路被激活;③与地塞米松+ad-lncRNA H19组相比,地塞米松+ad-lncRNA H19+PD98059组细胞Bax蛋白表达增加(P < 0.01),Bcl-2蛋白表达降低(P < 0.01);④提示过表达lncRNA H19通过激活MAPK-ERK信号通路抑制地塞米松诱导的MC3T3-E1细胞凋亡。

https://orcid.org/0000-0002-7572-544X(杨慧霞)

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词:  lncRNA H19, MAPK/ERK信号通路, 地塞米松, MC3T3-E1细胞, 凋亡

Abstract: BACKGROUND: The pathogenesis of steroid-induced osteonecrosis of femoral head is still unclear, which is closely related to osteoblast apoptosis.
OBJECTIVE: To investigate the role of long non-coding RNA H19 (lncRNA H19) in dexamethasone-induced osteoblast apoptosis.
METHODS: Mouse osteoblasts (MC3T3-E1) were cultured and divided into control group (no treatment) and dexamethasone group (treated with 1 μmol/L dexamethasone for 24 hours). Western blot was used to detect the protein expression levels of Bax, Bcl-2, and p-ERK1/2/ERK1/2. Flow cytometry and cell viability staining were used to detected cell apoptosis. qRT-PCR was performed to detect the expression of lncRNA H19. lncRNA H19 negative control plasmid (ad-NC) and lncRNA H19 overexpression plasmid (ad-lncRNA H19) were transfected into MC3T3-E1 cells, followed by 24 hours of dexamethasone intervention. Cell apoptosis of MC3T3-E1 was detected using cell viability staining, western blot assay, and flow cytometry. MC3T3-E1 cells were treated with MAPK-ERK pathway inhibitor (PD98059) for 24 hours and western blot was used to detect the protein expression levels of Bax and Bcl-2.  
RESULTS AND CONCLUSION: Compared with the control group, the apoptotic rate of MC3T3-E1 cells was increased in the dexamethasone group (P < 0.01), while the expression of lncRNA H19 was decreased (P < 0.01) and the MAPK/ERK signaling pathway was inhibited. Up-regulation of lncRNA H19 in MC3T3-E1 cells reduced the apoptosis of cells (P < 0.01) and activated the MAPK/ERK signaling pathway. MC3T3-E1 cells treated with dexamethasone+ad-lncRNA H19+PD98059 showed an increase in the expression of Bax (P < 0.01) and a decrease in the expression of Bcl-2 (P < 0.01) compared with the cells treated with dexamethasone+ad-lncRNA H19. These findings indicate that overexpression of lncRNA H19 can inhibit dexamethasone-induced apoptosis in MC3T3-E1 cells by activating the MAPK-ERK signaling pathway.

Key words: lncRNA H19, MAPK/ERK signaling pathway, dexamethasone, MC3T3-E1 cell, apoptosis

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