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METTL3,m6A修改和EGR1:相互作用影响心肌I/R损伤的结果

Chen Huang¹, Xun Zhang¹, Shi-Xiong Wu¹

¹Department of Cardiovascular Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450000, China.

Cell biology and toxicology

|December 20, 2024

概括

早期的脱氧化丁激酶 (DCK) 抑制通过抑制线粒细胞衰变和热死,可以防止心肌缺血/反 (I/R) 损伤. 这项研究揭示了DCK.

科学领域:

心血管生物学心血管生物学
分子医学是分子医学.
细胞病理学细胞病理学

背景情况:

心肌缺血/反 (I/R) 损伤带来了重大的临床挑战,需要更深入地了解其机制.
早期生长反应1 (EGR1) 已与增强肌肉心脏I/R损伤 (MIRI) 有关,但其调节途径尚不清楚.
线和热是MIRI所涉及的关键细胞过程,需要对它们的上游调节器进行调查.

研究的目的:

阐明EGR1在MIRI中调节心肌细胞中介灭的分子机制.
研究METTL3介导的m6A修饰和IGF2BP2在控制EGR1表达及其下游效应中的作用.
为了验证体外心肌细胞模型和体内小鼠模型中心肌 I/R 损伤的发现.

主要方法:

已确定的心肌细胞缺氧/低氧化 (H/R) 和心肌 I/R 损伤的小鼠模型.
在各种实验条件下评估了EGR1表达,JAK2/STAT3通路激活,线粒体,线粒体动态和热.
利用技术研究METTL3,m6A修饰和IGF2BP2在调节EGR1mRNA稳定性和表达中的作用.

主要成果:

在H / R条件下,EGR1被上调,抑制了JAK2 / STAT3通路,增强了线粒体,破坏了线粒体动力学,并促进了热.
通过IGF2BP2结合稳定EGR1mRNA的METTL3介导的m6A修饰,负责EGR1上调.
在体内,METTL3-IGF2BP2-EGR1轴的激活抑制了JAK2/STAT3,促进了热亡,破坏了线粒体动力学,并恶化了I/R损伤.

结论:

通过抑制JAK2/STAT3通路,EGR1在MIRI中发挥着至关重要的作用,通过抑制JAK2/STAT3通路促进甲基和热.
METTL3-IGF2BP2-EGR1轴是控制EGR1表达和随后的心肌细胞死亡的关键调节机制.
针对这种途径提供了一个潜在的治疗策略,以减轻心肌 I/R 损伤.

关键词:

在EGR1的EGR1 简氏激酶2/信号转换器和转录3路径的激活器 M6A 修改的修改线粒细胞衰变 - - 线粒细胞衰变 (mitophagy) 是一种心肌细胞的热灭菌.心肌缺血症/再输血损伤

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