IL-6 通过CRM1-依赖核出口通过KSHV介导的超缩抑制
bioRxiv : the preprint server for biology
|June 12, 2025
概括
卡波西卡波西 (Kaposi Kaposi) 是一个
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 在RNA生物学,RNA生物学.
背景情况:
- 卡波西肉瘤相关的疹病毒 (KSHV) 感染通过降解mRNA来破坏细胞平衡.
- 病毒内核酶SOX导致mRNA衰变和核RNA处理缺陷,包括转录超化.
- 一些mRNAs逃脱SOX介导的衰变和核保留,表明了替代的出口机制.
研究的目的:
- 为了研究KSHV感染如何影响mRNA多项 (A) 尾巴长度和核出口动态.
- 确定特定宿主mRNA规避KSHV诱导的核出口阻塞的机制.
- 确定CRM1通路在KSHV受影响的转录的核出口中的作用.
主要方法:
- 在KSHV阳性细胞中进行多A测序,以分析多A的尾巴长度.
- G/I尾随和sPAT测试用于研究mRNA出口动态.
- 抑制CRM1核出口通路,以评估其在IL-6出口中的作用.
主要成果:
- 在全球范围内,KSHV感染会增加mRNA多项 (A) 尾长.
- 在细胞质中发现了包括IL-6mRNA在内的超基化转录,避免了核保留.
- IL-6 mRNA 输出依赖于CRM1,而不是通过正规的NXF1-NXT1通路.
- 抑制CRM1可以降低IL-6核出口和稳定状态水平.
结论:
- 像IL-6这样的选择宿主mRNA利用CRM1路径绕过KSHV强加的核出口块.
- 过腺化不仅仅决定了核衰变,正如CRM1介导的IL-6出口所证明的那样.
- 在KSHV感染期间,CRM1在保护特定宿主转录的细胞质功能方面发挥着至关重要的作用.
- 这种选择性出口机制提供了对宿主病毒相互作用的洞察力,并将CRM1确定为潜在的治疗目标.
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