SARS-CoV-2重塑m6人类肺细胞长非编码RNA中的甲基化
Cristina M Peter1, Caio O Cyrino1, Nilmar S Moretti2
1Center for Medical Bioinformatics, Escola Paulista de Medicina, Federal University of São Paulo (UNIFESP), São Paulo 04039-032, SP, Brazil.
NAR molecular medicine
|November 21, 2025
概括
感染SARS-CoV-2会增加抗病毒长非编码RNA (lncRNAs) 中的N6-甲基氨酸 (m6A) 水平. 这种修改可能会抑制干扰素信号,影响宿主免疫力和病毒持久性.
科学领域:
- 分子生物学分子生物学
- 病毒学 病毒学
- 在RNA生物学,RNA生物学.
背景情况:
- N6-甲基氨酸 (m6A) 是一种关键的RNA修饰,影响RNA稳定性和翻译.
- 虽然在SARS-CoV-2感染期间宿主mRNA中的m6A已知,但其在长非编码RNA (lncRNAs) 中的作用仍然未被探索.
研究的目的:
- 研究SARS-CoV-2感染对lncRNAs.m6A修饰的影响.
- 确定受m6A影响的特定lncRNA,并了解它们在抗病毒反应中的潜在作用.
主要方法:
- 从SARS-CoV-2感染的人类肺细胞 (Calu-3) 的直接RNA测序 (dRNA-seq) 数据分析.
- 机器学习框架的应用,用于在lncRNA中检测m6A.
- 在预测的 lncRNA 二次结构中识别甲基化 DRACH 基因.
主要成果:
- 在10个与抗病毒反应相关的lncRNA中观察到m6A水平的全球增加.
- UCA1,GAS5和NORAD显示了最显著的m6A变化,可能会影响干扰素信号传递.
- 在 lncRNA 区域中发现了甲基化 DRACH 基因,这表明二次结构的不稳定性和相互作用部位的改变.
结论:
- 在全球范围内,SARS-CoV-2 感染对抗病毒 lncRNAs 中的 m6A 修饰进行了上调.
- m6A介导的lncRNA变化可能会导致干扰素表达减弱,并影响宿主抗病毒免疫力.
- 这些发现揭示了一个新的m6A依赖机制,SARS-CoV-2通过它调节宿主反应并促进病毒的持续性.
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