通过胆固醇结合蛋白隔离膜胆固醇,可以抑制SARS-CoV-2进入Vero E6细胞
Magdalena Kulma1, Aleksandra Šakanović1, Apolonija Bedina-Zavec1
1Department of Molecular Biology and Nanobiotechnology, National Institute of Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia.
概括
向富含胆固醇的膜域可以抑制严重急性呼吸系统综合征冠状病毒2 (SARS-CoV-2) 进入宿主细胞. 这项研究表明,胆固醇结合蛋白阻碍病毒尖端蛋白内化和复制.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 病毒学 病毒学
背景情况:
- 富含胆固醇 (CHOL) 和髓 (SM) 的膜域对细胞过程和病毒感染至关重要.
- 许多病毒,包括SARS-CoV-2,在这些域内利用血膜蛋白来附着和进入宿主细胞.
研究的目的:
- 为了调查向血膜领域的CHOL是否可以抑制SARS-CoV-2细胞进入.
- 探索CHOL可访问性在病毒感染效率中的作用.
主要方法:
- 制备具有高亲和力与血膜脂质的CHOL结合蛋白.
- 评估这些蛋白质对SARS-CoV-2尖端蛋白和伪病毒内部化的影响.
- 测量感染细胞中的SARS-CoV-2复制.
主要成果:
- 将CHOL结合蛋白 (perfingolysin O域四及其变体) 结合到膜CHOL显著损害了SARS-CoV-2尖端蛋白和伪病毒内部化.
- 在接受治疗的细胞中观察到SARS-CoV-2复制的减少.
- 证明CHOL丰富的膜域完整性对于SARS-CoV-2细胞进入至关重要.
结论:
- 结合CHOL的蛋白质可以通过破坏CHOL丰富的膜域,有效地阻止SARS-CoV-2细胞进入.
- 血膜中CHOL的可访问性是SARS-CoV-2感染的关键因素.
- 这项研究突出了针对宿主细胞脂质域的潜在治疗策略,以对抗病毒感染.
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