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通过促进脂质积累,SARS-CoV-2膜蛋白诱导MARCHF1/GPX4-介导的铁亡

Pei Sun¹, Qian Liu¹, Shuofeng Yuan²

¹Department of Biomedical Engineering, Hunan Provincial Key Laboratory of Medical Virology, College of Biology, Hunan University, Changsha, Hunan, China.

Journal of medical virology

|April 5, 2025

概括

SARS-CoV-2 膜蛋白 (M) 通过 MARCH1.1.4 通过降解谷氨过氧化酶 4 (GPX4) 驱动铁和脂质积累. 针对这种相互作用可能会治疗COVID-19.

科学领域:

病毒学病毒学
细胞的新陈代谢
病理学病理学病理学

背景情况:

SARS-CoV-2 膜蛋白 (M) 对于病毒组装至关重要,并与器官损伤和代谢问题有关.
了解M蛋白在宿主细胞过程中的作用,如铁和脂质积累,对于COVID-19治疗策略至关重要.

研究的目的:

研究SARS-CoV-2 M蛋白诱导宿主铁和脂质积累的机制.
为了确定关键的宿主因素和涉及M介导细胞损伤的途径.
在这些途径中探索潜在的治疗点.

主要方法:

在M蛋白表达时评估细胞对铁亡的敏感性.
分析利平-2和SREBP1在M诱导的脂质积累中的作用.
评估DGAT抑制剂桑托摩尔 (xanthohumol) 对脂质水平和铁亡的影响.
研究TIM23和TOMM20在M诱导的线粒体功能障碍中的参与.
检查M蛋白与GPX4之间的相互作用,并通过MARCH1.4检查其无处不在.

主要成果:

M蛋白表达增加了细胞对铁亡的敏感性.
利平-2和SREBP1是M诱导的脂质积累的关键媒介.
桑托胡摩尔可降低脂质积累,并对抗M诱导的铁亡.
通过TIM23和TOMM20.M蛋白通过TIM23和TOMM20促进线粒体功能障碍.
M蛋白与GPX4相互作用,导致其通过MARCH1降解,这一过程涉及M的R72残留物.
抑制脂质合成可以减轻线粒体功能障碍,这表明脂质 - 铁灭路径交叉.

结论:

SARS-CoV-2 M 蛋白质通过特定的宿主因子和途径促进铁和脂质积累.
M蛋白诱导线粒体功能障碍,加剧细胞损伤.
通过MARCH1调解的M蛋白与GPX4之间的相互作用是SARS-CoV-2病变发生的关键轴.
针对M-GPX4-MARCH1轴或脂质代谢,为COVID-19提供了一个潜在的治疗策略.

关键词:

在SARS-CoV-2膜蛋白中,铁性化 (ferroptosis) 是一种谷氨过氧化酶4的作用脂质的积累脂质的积累线粒体损伤造成的线粒体损伤

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