通过向CRISPR-Cas12a系统的mRNA对核糖体框架转移进行可编程调制
Shih-Hong Huang1,2, Shih-Cheng Chen1,3, Tsu-Ying Wu4
1Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
iScience
|December 21, 2023
概括
克里斯普尔RNA和克里斯普尔-Cas12a增强了编程的核糖体框架转移 (-1 PRF),这是SARS-CoV-2复制中的一个关键过程. 该系统提供了一种针对病毒RNA和对抗未来的冠状病毒流行病的新策略.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 病毒学 病毒学
背景情况:
- 减去 1 编程核糖体框架转移 (-1 PRF) 是一种关键的转化调节,在物种中得到保护.
- 这一过程对于重症急性呼吸系统综合征冠状病毒2 (SARS-CoV-2) 的复制至关重要.
- 针对1PRF所涉及的RNA结构提供了治疗潜力.
研究的目的:
- 研究CRISPRRNA和CRISPR-Cas12a在调节-1PRF中的作用.
- 探索CRISPR-Cas12a作为一种破坏SARS-CoV-2复制的工具的潜力.
- 开发针对冠状病毒的抗病毒疗法的新策略.
主要方法:
- 使用CRISPRRNA来刺激-1PRF.
- 使用CRISPR-Cas12a和CRISPR-Cas9复合体来评估它们对1PRF效率的影响.
- 执行CRISPR-Cas12a准屏幕,以识别破坏SARS-CoV-2框架转移伪结的有效地点.
- 在体外和哺乳动物细胞中量化1PRF抑制.
主要成果:
- 克里斯普尔RNA被证明可以刺激-1PRF.
- 与CRISPR-Cas9不同的是,CRISPR-Cas12a通过阻断核糖体来增强-1 PRF.
- 使用CRISPR-Cas12a针对SARS-CoV-2伪结结构,导致1PRF的显著抑制 (>70%在体外, ~50%在细胞中).
结论:
- CRISPR-Cas12系统可以通过阻断核糖体和变形RNA结构来调节-1 PRF效率.
- 克里斯普尔-Cas12a代表了一种有前途的新策略,用于开发针对冠状病毒的抗病毒疗法.
- 这项研究扩大了CRISPR系统在翻译调节和流行病准备方面的功能应用.
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