鉴定裂谷热病毒的宿主因子
Velmurugan Balaraman1, Sabarish V Indran1, Yonghai Li1
1Center of Excellence for Emerging and Zoonotic Animal Diseases, Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, 1800 Denison Ave, Manhattan, KS 66506, USA.
Viruses
|November 25, 2023
概括
研究人员确定WDR7是裂谷热病毒 (RVFV) 复制的关键宿主因素. 这一发现对于开发针对RVF和相关bunyaviruses的新抗病毒策略至关重要.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 宿主-病原体相互作用
背景情况:
- 裂谷热病毒 (RVFV) 引起裂谷热 (RVF),这是一个重要的动物性疾病,目前没有人类疫苗或抗病毒药物.
- 了解影响RVFV易感性和复制性的宿主因素对于开发有效的控制策略至关重要.
- 以前的研究还没有完全阐明为RVFV感染和复制所必需的宿主基因.
研究的目的:
- 通过大规模的基因选,识别谷热病毒 (RVFV) 复制所必需的宿主基因.
- 验证候选宿主因子在RVFV复制中的作用,并描述它们对病毒生命周期的影响.
- 研究WDR7作为RVFV和拉克罗斯脑炎病毒 (LACV) 复制的宿主因子的功能.
主要方法:
- 在人类A549细胞中进行CRISPR-Cas9淘汰查,以确定参与RVFV复制的宿主基因.
- 使用siRNA介导的淘汰和CRISPR-Cas9介导的淘汰验证了候选基因.
- 通过测量细胞内病毒RNA积累和通过斑块或TCID50检测确定病毒标位来评估病毒复制.
主要成果:
- 确定了大约900个可能参与RVFV感染和复制的基因.
- 沉默WDR7和LRP1显著损害了RVFV复制.
- WDR7淘汰细胞对细胞内RVFVRNA水平和病毒标位均表现出显著影响,影响RVFV在周期晚些时候 (24小时) 和LACV早期 (12小时) 的复制.
结论:
- 已确定WDR7是RVFV和LACV复制所需的重要宿主因子,这两种病毒属于Bunyavirales序列中的病毒.
- 这些发现突出了WDR7在促进飞博病毒复制中的关键作用,表明它是抗病毒疗法的潜在目标.
- 需要进一步的机制研究来阐明WDR7在病毒复制周期中的确切作用.
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