相关实验视频
Updated: Jun 13, 2025

09:05
MicroRNA-based Regulation of Picornavirus Tropism
Published on: February 6, 2017
7.5K
特定于TMPRSS2的反感性寡核酸抑制新兴病毒进入宿主细胞
Rafal Nowak1, Monika Gazecka1, Markus Hoffmann2
1Department of Molecular Virology, Institute of Bioorganic Chemistry Polish Academy of Sciences, Poznan, Poland.
Virology
|September 14, 2024
概括
针对TMPRSS2mRNA的反感性寡核酸 (ASO) 降低了这种蛋白酶的表达,抑制了新兴病毒如流感A病毒 (IAV) 和SARS-CoV-2的复制.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 药物发现 药物发现 药物发现
背景情况:
- 新兴的病毒如流感A病毒 (IAV) 和SARS-CoV-2对全球健康构成重大威胁.
- 宿主蛋白酶 (如TMPRSS2) 通过病毒表面蛋白质的蛋白质分解激活,对于病毒进入和病原发生至关重要.
- 针对病毒复制必不可少的宿主因素提供了一个有前途的治疗策略.
研究的目的:
- 为了研究TMPRSS2mRNA的二次结构.
- 设计和评估TMPRSS2-特定的反感性寡核酸 (ASOs) 作为潜在的抗病毒药物.
- 评估ASO在减少病毒进入和复制方面的有效性.
主要方法:
- 对TMPRSS2mRNA二次结构的分析.
- 设计和合成TMPRSS2-特定的反意义寡核酸 (ASOs).
- 在细胞培养中实验验证ASO疗效,以测量TMPRSS2表达,IAV感染和SARS-CoV-2入口.
主要成果:
- 一些设计的ASO显著降低了TMPRSS2表达水平.
- 这些ASO表明,A型流感病毒 (IAV) 感染率显著下降.
- 与ASOs一起观察到SARS-CoV-2进入细胞的显著减少.
结论:
- TMPRSS2是新兴病毒复制的关键宿主因素,包括IAV和SARS-CoV-2.
- 特定于TMPRSS2的反感性寡核酸 (ASO) 有效地降低TMPRSS2的表达并抑制病毒的进入.
- 针对TMPRSS2的ASO代表了对抗新出现的病毒感染的潜在治疗途径.
相关概念视频
siRNA - Small Interfering RNAs
16.6K
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...
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...
16.6K
RNA Interference
26.0K
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...
26.0K
Experimental RNAi
6.1K
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...
6.1K
Leaky Scanning
5.1K
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...
5.1K
Retrovirus Life Cycles
45.8K
Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the...
45.8K

