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依赖DNA的蛋白激酶催化子单元通过破坏依赖INF-2的线粒体动力学来促进败血症引起的心脏功能障碍

Mudi Ma^1,2, Hao Zhou³, Ying Zhang¹

¹Shenshan Medical Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Shanwei, Guangdong, China.

International journal of medical sciences

|March 11, 2024

概括

沉默DNA-依赖蛋白激酶催化子单元 (DNA-PKcs) 通过改善线粒体功能和减少细胞死亡来防止败血症引起的心肌病. 这突出了DNA-PKcs作为败血症并发症的潜在治疗点.

科学领域:

心脏病学心脏病学
分子生物学分子生物学
细胞生物学细胞生物学

背景情况:

败血症引起的心肌病 (SIC) 是感染的严重并发症,导致心脏功能障碍.
线粒体平衡和动力学在SIC病变发生过程中至关重要.
在SIC中,DNA依赖蛋白激酶催化子单元 (DNA-PKcs) 和逆转型素2 (INF2) 有关.

研究的目的:

研究DNA-PKcs和INF2在败血症引起的心肌病中的作用.
确定DNA-PKcs在败血症期间对线粒体功能和动态的影响.
评估DNA-PKcs作为SIC的潜在治疗点.

主要方法:

利用暴露于脂多糖 (LPS) 的HL-1心肌细胞来建模SIC.
采用DNA-PKcs淘汰技术来评估其影响.
测量了细胞毒性,亡标记物 (caspase-3,caspase-9),ATP产生,线粒体呼吸复合体活性,膜潜力和线粒体动力学 (裂变).

主要成果:

DNA-PKcs的淘汰显著减少了LPS诱导的心肌细胞死亡和功能障碍.
沉默DNA-PKcs降低了caspase-3和caspase-9的激活,这表明减少了亡.
DNA-PKcs的敲击改善了线粒体功能,包括ATP的产生和呼吸复合体活动,并保留了线粒体膜潜力.
删除DNA-PKcs阻止了LPS诱导的线粒体裂变,这表明它在调节线粒体动力学方面发挥了作用.

结论:

DNA-PKcs通过对线粒体平衡和动态产生负面影响,在败血症引起的心肌病中起着至关重要的作用.
在SIC期间,INF2参与与DNA-PKcs相互作用,调节线粒体功能.
向DNA-PKcs提供了一种有前途的治疗策略,用于减轻毒症中线粒体功能障碍.

关键词:

这就是DNA-PKcscs.在INF2中,可以找到INF2.在LPS中使用LPS.线粒体的恒常状态是线粒体的恒常状态

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