细胞培养
生物
病毒学
基因
病毒生命周期
RNA剪接
报告基因
病毒复制
反向遗传学
病毒
计算生物学
冠状病毒
生物安全
基因表达
细胞生物学
遗传学
2019年冠状病毒病(COVID-19)
核糖核酸
基因组
医学
生物技术
病理
传染病(医学专业)
疾病
作者
Yanying Yu,Xiaohui Ju,Qiang Ding
出处
期刊:Bio-protocol
[Bio-Protocol]
日期:2021-01-01
卷期号:11 (21)
被引量:3
标识
DOI:10.21769/bioprotoc.4257
摘要
The ongoing COVID-19 pandemic is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). As this virus is classified as a biosafety level-3 (BSL-3) agent, the development of countermeasures and basic research methods is logistically difficult. Recently, using reverse genetics, we developed a BSL-2 cell culture system for production of transcription- and replication-component virus-like-particles (trVLPs) by genetic transcomplementation. The system consists of two parts: SARS-CoV-2 GFP/ΔN genomic RNA, in which the nucleocapsid (N) gene, a critical gene for virion packaging, is replaced by a GFP reporter gene; and a packaging cell line for ectopic expression of N (Caco-2-N). The complete viral life cycle can be recapitulated and confined to Caco-2-N cells, with GFP positivity serving as a surrogate readout for viral infection. In addition, we utilized an intein-mediated protein splicing technique to split the N gene into two independent vectors and generated the Caco-2-Nintein cells as a packaging cell line to further enhance the security of this cell culture model. Altogether, this system provides for a safe and convenient method to produce trVLPs in BSL-2 laboratories. These trVLPs can be modified to incorporate desired mutations, permitting high-throughput screening of antiviral compounds and evaluation of neutralizing antibodies. This protocol describes the details of the trVLP cell culture model to make SARS-CoV-2 research more readily accessible.
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