对携带5'-酸盐的单链RNA进行RIG-I介导的抗病毒反应
Andreas Pichlmair1, Oliver Schulz, Choon Ping Tan
1Immunobiology Laboratory, Cancer Research UK, London Research Institute, London WC2A 3PX, UK.
概括
流感A病毒使用单链RNA (ssRNA) 与5'-酸盐激活抗病毒免疫力,而不是双链RNA (dsRNA). 病毒的NS1蛋白质阻断了这个RIG-I传感器,帮助免疫逃避.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 抗病毒免疫力依赖于识别病毒RNA模式.
- 网红酸诱导基因I (RIG-I) 和MDA5是关键的RNA酶传感器.
- 双链RNA (dsRNA) 被认为是主要的触发因素.
研究的目的:
- 为了研究在流感A病毒感染期间激活RIG-I的RNA物种.
- 确定针对RIG-I的病毒免疫逃避机制.
主要方法:
- 分析流感A感染期间产生的RNA.
- 评估RIG-I在受感染细胞中的激活.
- 研究病毒蛋白和RIG-I.I.之间的相互作用.
主要成果:
- 流感A病毒感染会产生带有5'-酸盐的单链RNA (ssRNA),而不是dSRNA.
- RIG-I是由5'-酸化的ssRNA激活的.
- 流感NS1蛋白与RIG-I形成复合体,抑制其激活.
结论:
- RIG-I作为一个ssRNA传感器,而不仅仅是一个dsRNA传感器.
- 流感NS1蛋白是一种针对RIG-I的免疫逃避因子.
- 通过RIG-I感知5'-酸化RNA,可以区分自我与非自我RNA.
相关概念视频
Types of RNA
Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
RNA Interference
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This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
RNA Interference
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
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In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...
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Experimental RNAi
RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
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Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...


