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核损伤诱导的DNA损伤反应与IFI16驱动的ECM重塑相结合,是扩张性心肌病的基础

Qingyong He¹, Xing Chang¹, Hui Zhang^1,2

¹Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China.

|May 14, 2025

概括

研究人员确定了扩张性心肌病 (DCM) 的新途径,其中DNA损伤反应 (DDR) 激活了干扰因子诱导蛋白16 (IFI16),导致纤维化. 在小鼠模型中,抑制DDR改善了心脏功能并减少了纤维化.

科学领域:

心脏病学心脏病学
分子生物学分子生物学
遗传学遗传学是一个

背景情况:

扩张性心肌病 (DCM) 涉及心室功能障碍和心力衰竭,其中涉及DNA损伤反应 (DDR) 途径.
连接DDR激活与细胞外基质 (ECM) 重塑和DCM纤维化的精确机制尚未完全理解.
干扰素诱导蛋白16 (IFI16),一种DNA传感器,可能会调解DDR在DCM病原发生中的作用.

研究的目的:

研究DDR-IFI16轴在DCM病原发生中的作用.
探索DDR-IFI16信号传输,ECM失调和心脏功能障碍之间的联系.
评估在DCM中针对DDR-IFI16轴的治疗潜力.

主要方法:

综合生物信息学分析人类心脏转录基因数据,在 doxorubicin 诱导的小鼠 DCM 模型中进行实验验证.
通过心声学评估心脏功能;使用qPCR,ELISA和丰富分析研究分子通路.
通过体内药理 DDR 抑制和体内 IFI16 siRNA 淘汰,测试了机械作用.

主要成果:

生物信息学在人类和小鼠DCM模型中揭示了激活的DDR和细胞质DNA传感途径.
高的IFI16表达与ECM组织途径和纤维基因相关;体内DDR抑制 (NU7441) 减弱了IFI16,改善了心脏功能,并减少了纤维化.
在实验室IFI16倒置减少了亲纤维细胞标记物,改善了细胞活力.

结论:

在DCM中,一种新的病原性轴涉及核应激诱导的DDR激活,调节IFI16,它介导ECM重塑和纤维化.
药物抑制DDR有效减少IFI16诱导,心脏纤维化,并改善心脏功能.
DDR-IFI16-ECM重塑轴是DCM病变发生的关键因素,也是潜在的治疗点.

关键词:

在DCM中,DCM是指DCM.对DNA损伤的反应反应这是一个ECM,ECM是ECM.第十六章十六十六十六纤维化纤维化

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