関連する実験動画
Updated: Jan 17, 2026

08:32
Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production
Published on: March 2, 2014
10.9K
ハタにおけるE3ユビキチンリガーゼRNF5は、自然免疫応答を抑制することによりウイルス複製を促進する
Yanqi Zhao1, Xiaohui Zheng1, Siting Wu1
1College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China.
Fish & shellfish immunology
|January 14, 2026
まとめ
ハタのリングフィンガープロテイン5(RNF5)は、シンガポールハタイリドウイルス(SGIV)およびレッドスポテッドハタ神経壊死症ウイルス(RGNNV)の複製を増強することが判明した。このタンパク質は抗ウイルス免疫応答を抑制し、魚類ウイルスの病原性を助ける。
科学分野:
- 水生動物の健康
- 魚類免疫学
- ウイルス病原学
背景:
- シンガポールハタイリドウイルス(SGIV)およびレッドスポテッドハタ神経壊死症ウイルス(RGNNV)は、ハタの養殖に大きな損失を引き起こす。
- テレオストの抗ウイルス免疫におけるE3ユビキチンリガーゼであるリングフィンガープロテイン5(RNF5)の役割は、よく理解されていない。
研究 の 目的:
- エピネフェルス・コイオイデスからEcRNF5遺伝子を同定し、特性評価すること。
- SGIVおよびRGNNVに対する抗ウイルス自然免疫におけるEcRNF5の機能を調査すること。
主な方法:
- EcRNF5の遺伝子同定および配列解析。
- ウイルス挑戦後のハタ脾臓細胞における発現解析。
- ウイルス複製および免疫遺伝子発現を評価するためのin vitroアッセイ。
- タンパク質間相互作用を決定するための共免疫沈降アッセイ。
主要な成果:
- EcRNF5の発現は、SGIVおよびRGNNV感染後に上方制御された。
- EcRNF5の過剰発現は、SGIVおよびRGNNVの複製を促進した。
- EcRNF5は、インターフェロン関連遺伝子および炎症性サイトカインの前駆体の発現を抑制した。
- EcRNF5は、主要な自然免疫シグナル伝達分子(EcSTING、EcTBK1、EcIRF3、EcIRF7)と相互作用し、それらのシグナル伝達経路を阻害した。
結論:
- EcRNF5は、ハタにおける抗ウイルス免疫を拮抗する上で重要な役割を果たしている。
- 本研究結果は、SGIVおよびRGNNVの病原性を促進するEcRNF5の分子メカニズムを解明する。
- 本研究は、魚類ウイルス相互作用および疾患制御の潜在的な標的に関する洞察を提供する。
関連する概念動画
RNA Interference
27.8K
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...
27.8K
Immune Response Against Viral Pathogens
1.8K
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...
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...
1.8K
Eukaryotic Transcription Inhibitors
10.9K
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...
Eukaryotic transcription inhibitors usually contain two distinct domains, a...
10.9K
Leaky Scanning
5.6K
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...
5.6K
Viruses with RNA Genomes
824
RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...
824
Rab Proteins
5.0K
Rab proteins constitute the largest family of monomeric GTPases, of which 70 members are present in humans. Rab proteins and their effectors regulate consecutive stages of vesicle transport such as vesicle transport, docking, and fusion to the correct recipient membrane.
Rab proteins switch between a cytosolic, GDP-bound inactive state and a membrane-anchored, GTP-bound active state. By themselves, Rabs show slow rates of GDP/GTP exchange and GTP hydrolysis. Thus, Rab proteins are considered...
Rab proteins switch between a cytosolic, GDP-bound inactive state and a membrane-anchored, GTP-bound active state. By themselves, Rabs show slow rates of GDP/GTP exchange and GTP hydrolysis. Thus, Rab proteins are considered...
5.0K

