在负链RNA病毒感染期间,RIG-I检测病毒基因组RNA
Jan Rehwinkel1, Choon Ping Tan, Delphine Goubau
1Immunobiology Laboratory, Cancer Research UK London Research Institute, 44 Lincoln's Inn Fields, London WC2A3PX, UK.
Cell
|February 11, 2010
概括
网红酸诱导基因I (RIG-I) 检测RNA病毒,触发干扰素的产生. 这项研究表明,只有全长的病毒基因组,而不是其他RNA类型,在感染期间激活RIG-I,从而启动先天免疫反应.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 分子生物学分子生物学
背景情况:
- RIG-I是RNA病毒检测和随后的干扰素诱导的关键传感器.
- 在病毒感染期间,自然RIG-I激活RNAs (抗原体) 的确切性质尚不清楚.
- 潜在的RIG-I激动剂包括病毒基因组,复制中间体,转录或宿主RNA片段.
研究的目的:
- 确定负责病毒感染细胞中干扰素诱导的特定生理RIG-I激动剂.
- 确定不同RNA物种在流感A和仙台病毒感染期间对RIG-I激活的相对贡献.
主要方法:
- 利用三个不同的实验方法来研究RIG-I激活.
- 用A型流感病毒和仙台病毒感染细胞来模仿自然感染条件.
- 分析了感染细胞中存在的RNA物种,以确定RIG-I激动剂.
主要成果:
- RIG-I激动剂仅在病毒复制过程中产生.
- 确定了全长的病毒基因组作为主要的RIG-I激动剂.
- 非基因组病毒转录,短复制中间体和分裂的自我RNA并没有对RIG-I激活做出重大贡献.
结论:
- 有5'-三酸盐的单链病毒RNA基因组是天然的RIG-I激动剂.
- 这些病毒基因组触发了细胞内在的本质免疫反应,对抗RNA病毒.
- 这一发现澄清了RIG-I激活的机制,以应对负链RNA病毒.
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
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...
Riboswitches
Riboswitches are non-coding mRNA domains that regulate the transcription and translation of downstream genes without the help of proteins. Riboswitches bind directly to a metabolite and can form unique stem-loop or hairpin structures in response to the amount of the metabolite present. They have two distinct regions – a metabolite-binding aptamer and an expression platform.
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
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...
siRNA - Small Interfering RNAs
Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
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...
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...
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...


