MDM2影响ACE2的稳定性和SARS-CoV-2的吸收
Quirin Emslander1, Karsten Krey1, Sabri Hamad1
1Institute of Virology, School of Medicine, Technical University of Munich (TUM), 81675 Munich, Germany.
Viruses
|August 26, 2023
概括
E3酶MDM2调节了 ангиотензин转化酶2 (ACE2) 的稳定性,影响了SARS-CoV-2的进入. 较低的MDM2水平增加了ACE2,增强了病毒感染.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- ангиотензин转化酶2 (ACE2) 是SARS-CoV-2进入宿主细胞的主要受体.
- 调节ACE2表达和局部化的宿主因素对于理解SARS-CoV-2感染动态至关重要.
- 控制ACE2稳定性的精确机制及其对病毒感染性的影响仍然不完全理解.
研究的目的:
- 研究宿主调节者的作用,特别是E3酶MDM2在控制ACE2表达中的作用.
- 为了确定MDM2介导的ACE2调节如何影响SARS-CoV-2感染.
- 阐明MDM2影响ACE2稳定性和病毒吸收的分子机制.
主要方法:
- 宿主细胞中MDM2的遗传耗尽.
- 通过定量测试评估ACE2表达水平.
- 使用SARS-CoV-2伪型病毒和病毒样颗粒的感染研究.
- 在lysine 788中对ACE2的MDM2泛基化和随后的蛋白质体降解的分析.
主要成果:
- MDM2的遗传衰竭导致ACE2表达水平显著升高.
- 由于MDM2枯竭而增加的ACE2表达强烈促进了各种SARS-CoV-2分离物的感染.
- 发现MDM2在lysine 788中直接在ACE2上无处不在,以蛋白质体降解为目标,从而控制ACE2的稳定性和病毒的进入.
结论:
- E3酶MDM2是ACE2稳定性和表达的关键调节者.
- 通过MDM2介导的ACE2降解在调节SARS-CoV-2感染性方面发挥着至关重要的作用.
- 像MDM2这样的细胞调节剂是对宿主易受SARS-CoV-2感染的重要决定因素.
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