通过Keap1-NRF2轴,SARS-CoV-2 ORF3a通过Keap1-NRF2轴使细胞对铁变敏感
Lihong Liu1, Jie Du2, Sidi Yang3
1MOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of Medicine, Shenzhen Campus of Sun Yat-Sen University, Sun Yat-Sen University, Shenzhen, China; Guangzhou Laboratory, Bio-island, Guangzhou, Guangdong, PR China.
这是SARS-CoV-2病毒.
科学领域:
- 病毒学 病毒学
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
背景情况:
- 病毒感染诱导的细胞死亡影响病毒的发病.
- 严重的COVID-19涉及器官功能障碍和细胞因子风暴,可能与SARS-CoV-2诱导的细胞死亡有关.
- 在COVID-19中发现了高反应性氧物种 (ROS) 和铁灭症的迹象,但机制尚不清楚.
研究的目的:
- 阐明SARS-CoV-2诱导细胞死亡的机制.
- 研究SARS-CoV-2ORF3a蛋白在细胞死亡途径中的作用.
- 探索SARS-CoV-2感染,氧化应激和铁亡之间的联系.
主要方法:
- 研究了SARS-CoV-2 ORF3a与Keap1-NRF2通路之间的相互作用.
- 评估ORF3a对NRF2降解和细胞氧化应激抗性的影响.
- 利用细胞模型研究SARS-CoV-2组件的铁灭诱导.
主要成果:
- SARS-CoV-2 ORF3a使细胞对铁亡产生敏感.
- 通过招募Keap1,ORF3a促进NRF2降解,减少细胞抗氧化剂防御.
- 这种机制促进了ferroptotic细胞死亡,有助于病毒病原性.
结论:
- SARS-CoV-2 ORF3a 作为铁亡的积极调节剂.
- 这一发现可能解释了COVID-19患者观察到的多器官损伤.
- 抑制铁亡是一种潜在的COVID-19治疗策略.
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