相关实验视频

Updated: Jul 2, 2025

Rescue of Recombinant Newcastle Disease Virus from cDNA

Rescue of Recombinant Newcastle Disease Virus from cDNA

Published on: October 11, 2013

干扰素-γ作为SARS-CoV-2ORF6辅助蛋白的潜在抑制剂

Elena Krachmarova¹, Peicho Petkov², Elena Lilkova³

¹Institute of Molecular Biology "Roumen Tsanev", Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria.

International journal of molecular sciences

|February 24, 2024

概括

人类干扰素- (hIFNγ) 通过恢复mRNA运输和减少病毒复制,有效地抑制SARS-CoV-2ORF6蛋白活性. 这种细胞因子显示出作为治疗SARS-CoV-2感染的治疗剂的前景.

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:

通过抑制干扰素通路,SARS-CoV-2 ORF6蛋白质通过抑制干扰素通路来破坏宿主天生的免疫力.
ORF6蛋白质隔离器RAE1,阻止核mRNA的输出,并阻碍宿主细胞的功能.
ORF6的柔性C端对其与宿主蛋白的相互作用至关重要.

研究的目的:

研究人类干扰素- (hIFNγ) 作为SARS-CoV-2ORF6蛋白活性抑制剂的潜力.
评估hIFNγ对ORF6介导的mRNA运输和病毒复制的抑制作用.

主要方法:

在in silico对接模拟中评估hIFNγ与ORF6.6的结合亲和力.
使用ORF6过度表达细胞进行体外研究,以分析RAE1局部化和mRNA输出.
光显微镜和qRT-PCR测量GFP表达作为mRNA传输的指标.
对RNA-DNA混合物的评估,以评估对DNA复制的影响.

主要成果:

hIFNγ与SARS-CoV-2的ORF6蛋白结合,在体中具有很高的亲和力.
在体外,hIFNγ治疗通过改变RAE1定位,恢复了从核到细胞质的mRNA输出.
hIFNγ治疗恢复了ORF6转移的细胞中的GFP表达,表明成功的mRNA贩运.
hIFNγ减少了RNA-DNA杂交,减轻了ORF6对DNA复制的负面影响.

结论:

hIFNγ有效地抑制了SARS-CoV-2 ORF6蛋白的生物活性.
hIFNγ显示出作为一种治疗策略的潜力,以抵消ORF6-介导的免疫逃避和复制.
用hIFNγ针对ORF6提供了一种有希望的方法来对抗SARS-CoV-2感染.

关键词:

在 COVID-19 疫情中,在R-Loop中使用.一个RAE1就是RAE1.在SARS-CoV-2的ORF6 计算建模计算建模人类干扰素-γγ 免疫光效应免疫光效应天生的免疫反应.在mRNA运输过程中.

更多相关视频

Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production

Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production

Published on: March 2, 2014

Visualization of SARS-CoV-2 using Immuno RNA-Fluorescence In Situ Hybridization

Visualization of SARS-CoV-2 using Immuno RNA-Fluorescence In Situ Hybridization

Published on: December 23, 2020

相关概念视频

RNA Interference

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...

Leaky Scanning

Leaky Scanning

During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R...

Experimental RNAi

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...

siRNA - Small Interfering RNAs

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...

Immune Response Against Viral Pathogens

Immune Response Against Viral Pathogens

The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...

Eukaryotic Transcription Inhibitors

Eukaryotic Transcription Inhibitors

Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells.
Eukaryotic transcription inhibitors usually contain two distinct domains, a...