线粒体抗氧化剂可以减轻小鼠的SARS-COV-2病理
Joseph W Guarnieri1, Timothy Lie1,2, Yentli E Soto Albrecht1,3
1The Center for Mitochondrial and Epigenomic Medicine, The Children's Hospital of Philadelphia, Philadelphia, PA 19104.
概括
针对线粒体的抗氧化剂,如mCAT和EUK8,通过降低活性氧物种 (ROS) 和恢复线粒体功能,降低了SARS-CoV-2的严重程度. 这种宿主导疗法显示出对COVID-19治疗的前景,独立于病毒突变.
科学领域:
- 生物化学 生物化学
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
背景情况:
- SARS-CoV-2 感染破坏了线粒体的氧化酸化 (OXPHOS),增加了线粒体的 ROS (mROS).
- 这种代谢转变激活缺氧诱导因子-1α (HIF-1α),促进糖解和病毒复制,同时释放线粒体DNA (mtDNA) 并触发天生的免疫力.
研究的目的:
- 调查线粒体向抗氧化剂是否可以减轻SARS-CoV-2诱导的病理.
- 在小鼠模型中评估转基因线粒体向性催化酶 (mCAT) 和药理学EUK8的疗效.
主要方法:
- 表达人类ACE2的小鼠感染了SARS-CoV-2,并用mCAT或EUK8.8治疗.
- 评估了临床严重程度,体重减轻,循环mtDNA,肺病毒载量和炎症标志物.
- 在感染的肺组织上进行了RNA测序,以分析基因表达变化.
主要成果:
- 两种mCAT和EUK8治疗都显著降低了体重减轻,临床严重程度和循环mtDNA水平.
- 肺部分析显示HIF-1α,病毒蛋白和炎症性细胞因子减少.
- RNA测序显示,治疗可以调高OXPHOS基因表达,降低HIF-1α和先天免疫基因表达.
结论:
- 催化降低线粒体ROS (mROS) 有效地减轻了SARS-CoV-2病理.
- 线粒体向抗氧化剂代表了COVID-19潜在的宿主导疗法,在病毒突变抵抗方面具有优势.
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