黄素通过SIRT1-DRP1/PGC-1α通路同时改善线粒体动力学和心肌细胞败血症后的生物能量
Dongyao Hou1,2, Haitang Liao1,3, Shuai Hao1,4
1Department of Anesthesiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China.
Heliyon
|April 8, 2024
概括
黄素通过SIRT1激活增强线粒体质量,改善败血症引起的心脏功能障碍. 这种新的机制保护心脏功能,并减少败血症中的氧化应激.
科学领域:
- 心脏病学 心脏病学
- 线粒体生物学 线粒体生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 败血性心肌病 (SCM) 是一个重大的临床挑战,死亡率高,缺乏有效的治疗方法.
- 线粒体功能障碍和氧化应激是SCM病变发生的关键因素.
- 黄素表现出已知的抗氧化和抗炎性质,但其在SCM中的有效性尚未证明.
研究的目的:
- 调查黄素在改善败血症引起的心脏功能障碍方面的潜力.
- 阐明涉及线粒体质量改善和炎症反应调节的潜在机制.
- 测试黄素通过激活sirtin 1 (SIRT1) 和增强线粒体功能来改善SCM的假设.
主要方法:
- 建立了体内 (老鼠败血症模型) 和体内 (HL-1细胞) 实验系统.
- 服用黄素和评估心脏功能使用心声回声学.
- 分析了炎症标记物,线粒体生物发生基因 (Pgc1α,Tfam,Nrf2),SIRT1激活和线粒体形态通过qPCR,西方斑点和电子显微镜.
主要成果:
- 在败血症小鼠模型中,黄素治疗显著保护了心脏功能.
- 黄素提高了SIRT1的调节,促进了线粒体生物发生 (Pgc1α,Tfam,Nrf2),并减少了线粒体的分裂.
- 黄素的SIRT1激活恢复了线粒体形态和功能,缓解了SCM.
- 抑制SIRT1取消了黄素的保护作用,证实了它的关键作用.
结论:
- 黄素通过增强线粒体生物发生和通过SIRT1激活抑制线粒体碎片化,有效地改善败血症中的心脏功能.
- 这项研究为黄素在SCM中的心脏保护作用提供了新的机制性见解.
- 黄素是治疗败血症引起的心脏功能障碍的一种有前途的治疗药物.
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