一个分解蛋白和金属蛋白酶域9促进SARS-CoV-2进入具有低ACE2表达的细胞
Ivonne Melano1, Wei-Chung Cheng2,3, Li-Lan Kuo1
1Graduate Institute of Biomedical Sciences, China Medical University , Taichung, Taiwan.
Microbiology spectrum
|September 15, 2023
概括
一个分解蛋白和金属蛋白酶域9 (ADAM9) 作为SARS-CoV-2进入的关键宿主因子,通过与病毒Spike蛋白和ACE2相互作用来增强感染. 沉默ADAM9降低了传染性,即使对于有关变体,提供潜在的治疗点.
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:
- 严重急性呼吸道综合征冠状病毒2 (SARS-CoV-2) 使用血管素转化酶2 (ACE2) 进入细胞.
- 观察到的组织热带性表明,ACE2以外的其他宿主因素有助于SARS-CoV-2感染.
- 了解病毒与宿主之间的相互作用对于开发有效的抗病毒策略来对抗新兴变种至关重要.
研究的目的:
- 为了确定参与促进SARS-CoV-2进入的宿主蛋白质.
- 阐明已识别的宿主因素对病毒感染有所贡献的机制.
- 探索COVID-19的潜在治疗点.
主要方法:
- 在H1650和HEK293T细胞中排列的shRNA屏幕以识别宿主因子.
- 沉默和过度表达实验,以评估ADAM9在病毒进入中的作用.
- 免疫沉积和共同表达的研究,以调查蛋白质相互作用 (ADAM9,ACE2,SARS-CoV-2尖端).
- 使用SARS-CoV-2令人担忧的变种 (阿尔法,三角形,奥米克朗) 评估感染力.
主要成果:
- 一个分解蛋白和金属蛋白酶域9 (ADAM9) 被确定为SARS-CoV-2进入的关键宿主因子.
- 抑制ADAM9显著降低了SARS-CoV-2的进入和感染力,包括令人担忧的变种.
- ADAM9与SARS-CoV-2尖端蛋白的S1亚单元和ACE2相互作用,增强病毒的进入和感染.
- ADAM9的酶活性对于促进SARS-CoV-2进入至关重要.
结论:
- ADAM9作为ACE2的共同因子,在SARS-CoV-2结合和内细胞分裂中发挥着重要作用.
- ADAM9,ACE2和SARS-CoV-2尖端蛋白之间的相互作用对于有效的病毒进入至关重要.
- 针对ADAM9介导的入口途径是一个有希望的策略,用于开发针对COVID-19的新疗法.
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