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RNA interference is an antiviral defence mechanism in Caenorhabditis elegans

机译:RNA干扰是秀丽隐杆线虫的抗病毒防御机制。

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RNA interference (RNAi) is an evolutionarily conserved sequence-specific post-transcriptional gene silencing mechanism that is well defined genetically in Caenorhabditis elegans(1-4). RNAi has been postulated to function as an adaptive antiviral immune mechanism in the worm, but there is no experimental evidence for this. Part of the limitation is that there are no known natural viral pathogens of C. elegans. Here we describe an infection model in C. elegans using the mammalian pathogen vesicular stomatitis virus (VSV) to study the role of RNAi in antiviral immunity. VSV infection is potentiated in cells derived from RNAi-defective worm mutants (rde-1; rde-4), leading to the production of infectious progeny virus, and is inhibited in mutants with an enhanced RNAi response (rrf-3; eri-1). Because the RNAi response occurs in the absence of exogenously added VSV small interfering RNAs, these results show that RNAi is activated during VSV infection and that RNAi is a genuine antiviral immune defence mechanism in the worm.
机译:RNA干扰(RNAi)是一种进化保守的序列特异的转录后基因沉默机制,在秀丽隐杆线虫(1-4)中在遗传学上已明确定义。 RNAi已被假定在蠕虫中具有适应性抗病毒免疫机制的功能,但尚无实验证据。部分限制是没有已知的秀丽隐杆线虫自然病毒病原体。在这里,我们描述了使用哺乳动物病原体水泡性口腔炎病毒(VSV)研究秀丽隐杆线虫的感染模型,以研究RNAi在抗病毒免疫中的作用。 VSV感染在源自RNAi缺陷蠕虫突变体(rde-1; rde-4)的细胞中得到增强,导致感染性子代病毒的产生,并在具有增强的RNAi反应的突变体中被抑制(rrf-3; eri-1) )。由于RNAi反应是在不存在外源添加的VSV小干扰RNA的情况下发生的,因此这些结果表明RNAi在VSV感染过程中被激活,并且RNAi是蠕虫中真正的抗病毒免疫防御机制。

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