寨卡病毒对干扰素依赖的R循环诱导有助于增长衰减
Yijing Zhao1, Anna D Metzler1, Yangping Li2
1Department of Biological Science, Florida State University, Tallahassee, FL 32306, USA.
PNAS nexus
|May 19, 2025
概括
寨卡病毒 (ZIKV) 感染通过诱导R环,即RNA-DNA混合体,导致神经细胞中的DNA损伤. 这种与干扰素刺激基因相关的R循环形成,破坏了DNA复制,并导致细胞循环停止,阻碍了大脑的发育.
科学领域:
- 分子生物学分子生物学
- 病毒学 病毒学
- 神经科学是一个神经科学.
背景情况:
- 寨卡病毒 (ZIKV) 感染人类神经原始体会导致DNA损伤和细胞循环停止,可能会损害大脑发育.
- 导致ZIKV诱导的神经原生细胞循环停止的精确分子机制仍然不完全理解.
研究的目的:
- 调查ZIKV诱导的S相停止,复制分叉停滞和R循环形成之间的联系.
- 阐明干扰素刺激基因 (ISG) 和R环在ZIKV病变发生过程中的作用.
主要方法:
- 对DNA损伤反应 (DDR) 的测定.
- DRIP-seq (DNA-RNA免疫沉测序) 用于识别R循环位置.
- 氨酸序列测序用于分析新生的转录.
- 基因淘汰 (IFN受体) 和过度表达 (RNaseH1) 研究的研究.
主要成果:
- 寨卡病毒感染会在特定位置诱导R环,特别是在干扰素刺激基因 (ISG) 内.
- 新生的ISG转录在ZIKV感染期间容易形成R循环.
- 消除IFN受体消除了ISG上的R循环,并部分挽救了S相停止.
- 过度表达RNaseH1减少了ZIKV诱导的DNA损伤和细胞循环停止.
结论:
- 由ZIKV诱导的非计划的ISG表达破坏了R循环平衡,导致复制分叉停滞和DNA损伤.
- 依赖IFN的R循环诱导是一种基于核酸的新型机制,有助于ZIKV感染的神经细胞的细胞循环停止.
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