中国组织工程研究 ›› 2020, Vol. 24 ›› Issue (35): 5613-5618.doi: 10.3969/j.issn.2095-4344.2353

• 组织构建实验造模 experimental modeling in tissue construction • 上一篇    下一篇

异甘草素抑制SETD7表达可保护缺氧/复氧诱导心肌细胞的氧化损伤

于  辉1,赵  阳1,费家玥1,张文礼1,赵洛沙2   

  1. 1郑州大学第五附属医院心肺康复科,河南省郑州市  4500522郑州大学第一附属医院心血管内科,河南省郑州市  450052

  • 收稿日期:2019-11-11 修回日期:2019-11-16 接受日期:2020-01-18 出版日期:2020-12-18 发布日期:2020-10-16
  • 作者简介:于辉,女,1980年生,河南省漯河市人,汉族,2006年郑州大学毕业,硕士,副主任医师,主要从事心血管疾病方面的研究。
  • 基金资助:
    2018年河南省医学科技攻关计划项目(2018020250)

Isoliquiritigenin inhibits SETD7 expression against oxidative damage in cardiomyocytes induced by hypoxia/reoxygenation

Yu Hui1, Zhao Yang1, Fei Jiayue1, Zhang Wenli1, Zhao Luosha2   

  1. 1Department of Cardiopulmonary Rehabilitation, Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China; 2Department of Cardiology, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China

  • Received:2019-11-11 Revised:2019-11-16 Accepted:2020-01-18 Online:2020-12-18 Published:2020-10-16
  • About author:Yu Hui, Master, Associate chief physician, Department of Cardiopulmonary Rehabilitation, Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
  • Supported by:
    2018 Henan Provincial Medical Science and Technology Research Project, No. 2018020250

摘要:

文题释义:

氧化损伤:活性氧和活性氮是引起蛋白质氧化损伤的重要因素。活性氧和活性氮可以通过多种代谢途径产生,如化学毒物与药物代谢、细胞呼吸、辐射、光照等。

异甘草素:是从甘草中进一步提取的单体化合物,已有研究提示异甘草素可通过抑制AMPK信号通路而发挥抗氧化作用,从而改善缺氧心肌细胞收缩功能障碍。但是异甘草素对缺血/再灌注损伤心肌细胞的作用机制尚未深入研究。

背景:缺血性心脏病已成为威胁人体健康的重要疾病之一,但其发生发展的分子机制尚未阐明。

目的:探讨异甘草素对心肌细胞缺氧/复氧损伤后氧化应激及细胞凋亡的影响及其可能的作用机制。

方法:体外培养大鼠心肌细胞H9C2,随机分为空白对照组、缺氧/复氧组、缺氧/复氧+异甘草素10204080 μmol/L组,缺氧/复氧+si-con(si-con为阴性对照)、缺氧/复氧+si-SETD7组、缺氧/复氧+异甘草素+pcDNA组、缺氧/复氧+异甘草素+pcDNA-SETD7组。采用MTT法检测细胞存活率;采用流式细胞仪检测细胞凋亡情况;测定细胞中活性氧、谷胱甘肽过氧化物酶、丙二醛水平;蛋白免疫印迹法检测细胞中凋亡相关蛋白活化半胱氨酸蛋白酶3表达。

结果与结论:①与空白对照组比较,缺氧/复氧组细胞存活率显著降低(P < 0.05),细胞凋亡率显著升高(P < 0.05),活化半胱氨酸蛋白酶3蛋白表达水平与活性氧、丙二醛水平显著升高(P < 0.05),而谷胱甘肽过氧化物酶水平显著降低(P < 0.05);②与缺氧/复氧组比较,缺氧/复氧+异甘草素10,20,40,80 μmol/L组细胞存活率显著升高(P < 0.05),细胞凋亡率显著降低(P < 0.05),SETD7、活化半胱氨酸蛋白酶3蛋白表达水平与活性氧、丙二醛水平显著降低(P < 0.05),而谷胱甘肽过氧化物酶水平显著升高(P < 0.05);③与缺氧/复氧+si-con组相比,缺氧/复氧+si-SETD7组心肌细胞存活率显著升高(P < 0.05),细胞凋亡率显著降低(P < 0.05),SETD7与活化半胱氨酸蛋白酶3蛋白的表达水平显著降低(P < 0.05),活性氧、丙二醛水平显著降低(P < 0.05),谷胱甘肽过氧化物酶水平显著升高(P < 0.05);④与缺氧/复氧+异甘草素+pcDNA组相比,缺氧/复氧+异甘草素+ pcDNA-SETD7组心肌细胞存活率显著降低(P < 0.05),细胞凋亡率显著升高(P < 0.05),SETD7、活化半胱氨酸蛋白酶3蛋白表达水平显著升高(P < 0.05),活性氧、丙二醛水平显著升高(P < 0.05),谷胱甘肽过氧化物酶水平显著降低(P < 0.05);⑤提示异甘草素可通过抑制SETD7表达而抵抗细胞凋亡及增强其抗氧化能力,从而对缺氧/复氧损伤心肌细胞发挥保护作用。

ORCID: 0000-0002-7612-454X(于辉)

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: 异甘草素, SETD7, 缺氧/复氧, 心肌细胞, 氧化应激

Abstract:

BACKGROUND: Ischemic heart disease has become one of the important diseases that threaten human health, but the molecular mechanism of its occurrence and development has not yet been elucidated.

OBJECTIVE: To investigate the effects of isoliquiritigenin (ISL) on oxidative stress and apoptosis in cardiomyocytes after hypoxia/reoxygenation (H/R) injury and its possible mechanism.

METHODS: Rat cardiomyocytes H9C2 were cultured in vitro and randomly divided into normal control group, H/R group, H/R+ISL 10, 20, 40, 80 μmol/L groups, H/R+si-con group, H/R+si-SETD7 group, H/R+ISL+pcDNA group, H/R+ISL+pcDNA-SETD7 group. Cell viability was measured using methylthiazolyl tetrazolium (MTT) assay. Apoptosis was detected by flow cytometry. The levels of reactive oxygen species (ROS), glutathione peroxidase (GSH-Px), and malondialdehyde (MDA) in the cells were measured. The expression of apoptosis-related protein Cleaved Caspase-3 was detected by western blot assay.

RESULTS AND CONCLUSION: Compared with the normal control group, the cell survival rate of H/R group was significantly decreased (P < 0.05), the apoptosis rate was significantly increased (P < 0.05), Cleaved caspase-3 expression and ROS and MDA levels were significantly increased (P < 0.05), while the GSH-Px content was significantly reduced (P < 0.05). Compared with the H/R group, the cell survival rate of H/R+ISL 10, 20, 40, 80 μmol/L groups was significantly increased (P < 0.05), and the apoptosis rate was significantly decreased (P < 0.05), and the expression of SETD7 and Cleaved caspase-3 was significantly decreased (P < 0.05), and the levels of ROS and MDA were significantly decreased (P < 0.05), while the content of GSH-Px was significantly increased (P < 0.05). Compared with the H/R+si-con group, the cell survival rate of H/R+si-SETD7 group was significantly increased (P < 0.05), the apoptosis rate was significantly decreased (P < 0.05), the expression of SETD7 and Cleaved caspase-3 was significantly decreased (P < 0.05), and the levels of ROS and MDA were significantly decreased (P < 0.05), while the content of GSH-Px was significantly increased (P < 0.05). Compared with the H/R+ISL+pcDNA group, the cell survival rate of H/R+ISL+pcDNA-SETD7 group was significantly decreased (P < 0.05), the apoptosis rate was significantly increased (P < 0.05), the expression of SETD7 and Cleaved caspase-3 was significantly increased (P < 0.05), and the levels of ROS and MDA were significantly increased (P < 0.05), while the content of GSH-Px was significantly decreased (P < 0.05). These findings indicate that ISL can inhibit the expression of SETD7 to reduce the apoptosis of cardiomyocytes induced by H/R and enhance the cell antioxidant capacity, thereby protecting cardiomyocytes against H/R injury.

Key words: ">isoliquiritigenin, SETD7, hypoxia/reoxygenation, cardiomyocytes, oxidative stress

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