双RNA-seq揭示了宿主-病原体相互作用中的非编码RNA功能
Alexander J Westermann1, Konrad U Förstner1,2, Fabian Amman3,4
1University of Würzburg, RNA Biology Group, Institute for Molecular Infection Biology, Josef-Schneider-Straße 2/D15, D-97080 Würzburg, Germany.
Nature
|January 21, 2016
概括
研究人员发现一种细菌小RNA,Pint,它在感染期间调节沙门氏菌的毒性. 这一发现为病原体与宿主相互作用和细菌基因调节提供了新的见解.
科学领域:
- 微生物学
- 分子生物学
- 基因组学
背景情况:
- 细菌中的小RNA (sRNA) 在基因调节中起着至关重要的作用,但它们在病变过程中的功能往往不清楚.
- 标准的毒性测试缺乏敏感性,以揭示许多细菌sRNA在宿主-病原体相互作用中的影响.
研究的目的:
- 调查细菌小RNA在沙门氏菌血清 Typhimurium感染中的调节作用.
- 在病原体和宿主中同时表达RNA,以发现新的调节机制.
主要方法:
- 使用双RNA测序 (RNA-seq) 方法同时分析感染期间的病原体和宿主基因表达.
- 进行了物种间相关性分析,将细菌sRNA与宿主细胞通路联系起来.
主要成果:
- 确定了一种PhoP激活的小RNA, PinT, 暂时控制细菌入侵和细胞内生存基因.
- 证明Pint显著改变宿主细胞编码和非编码RNA转录,包括JAK-STAT信号通路中的转录.
- 在宿主长非编码RNA中发现感染特异性变化.
结论:
- 双RNA-seq方法为研究细胞内细菌病原体及其宿主提供了一个敏感的方法.
- 细菌的核糖调节剂,如Pint,对宿主细胞基因表达和信号通路有很大的影响.
- 这项研究为发现病原体基因隐藏功能和了解宿主-病原体动态开辟了新的途径.
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