通过病毒诱导的deISGylation来调节先天免疫和细胞代谢的失调
bioRxiv : the preprint server for biology
|September 18, 2025
概括
在SARS-CoV-2的帕帕因类蛋白酶 (PLpro) 脱化阻碍了天生的免疫力. 抑制PLpro的活性可以增强抗病毒防御,并揭示病毒如何操纵宿主新陈代谢.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 分子生物学分子生物学
背景情况:
- 干扰素刺激的15 (ISG15) 基因结合 (ISGylation) 对抗病毒免疫非常重要.
- 像SARS-CoV-2这样的病原体使用deISGylating酶来颠覆宿主反应.
- 病毒去糖化的确切目标和效果在很大程度上是未知的.
研究的目的:
- 调查SARS-CoV-2类似帕帕因蛋白酶 (PLpro) 在宿主-病原体相互作用中的去ISGylating活动的作用.
- 阐明PLpro deISGylation影响细胞代谢和免疫激活的分子机制.
- 确定抑制病毒deISGylation对病毒复制和清除的生理后果.
主要方法:
- 对SARS-CoV-2 PLpro去ISGylating活动的基因切除.
- 在人体细胞中的体外研究和在小鼠中的体内研究.
- 非目标代谢学和ISGylome蛋白学分析.
- 功能性测试评估天生的免疫激活,病毒复制和病毒清除.
主要成果:
- 丧失PLpro的解化活性显著增强了先天免疫反应.
- 废除deISGylation减弱了SARS-CoV-2复制,并在细胞和动物模型中促进了病毒清除.
- 发现PLpro deISGylation可以控制糖解中的关键代谢酶,酸途径和氧化应激反应途径.
- 通过可逆ISGylation揭示了免疫代谢调节的详细分子洞察力.
结论:
- 病毒脱化,特别是SARS-CoV-2 PLpro的病毒脱化,是颠覆宿主抗病毒免疫力和重新编程细胞代谢的关键机制.
- 抑制病毒deISGylating酶代表了对抗SARS-CoV-2感染的潜在治疗策略.
- 可逆ISGylation在协调免疫反应和代谢过程中发挥着基本作用.
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