相关实验视频

Updated: Sep 10, 2025

Dissecting Host-virus Interaction in Lytic Replication of a Model Herpesvirus

Dissecting Host-virus Interaction in Lytic Replication of a Model Herpesvirus

Published on: October 7, 2011

解读pUL10在瘟病毒毒性的掌握:宿主免疫和病毒复制的双重协调

Chunmei Li¹, Mingshu Wang¹, Anchun Cheng²

¹Engineering Research Center of Southwest Animal Disease Prevention and Control Technology for Ministry of Education of the People's Republic of China, International Joint Research Center for Animal Disease Prevention and Control of Sichuan Province, Key Laboratory of Animal Disease and Human Health of Sichuan Province, Research Center of Avian Disease and Institute of Veterinary Medicine and Immunology, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China.

Poultry science

|August 20, 2025

概括

瘟病毒 (DPV) 使用其UL10蛋白来降解MDA5,这是干扰素β (IFN-β) 免疫反应的关键部分. 这种机制有助于病毒躲避检测并在子中复制.

科学领域:

病毒学
免疫学
分子生物学

背景情况:

干扰素 (IFN) 对于抗病毒免疫力至关重要,但病毒采用复杂的策略来逃避它的作用.
瘟病毒 (DPV) 感染影响免疫器官,其毒性因素尚未完全理解.
黑色素分化相关蛋白5 (MDA5) 在检测病毒RNA和触发IFN-β产生方面发挥作用.

研究的目的:

研究DPV感染对子免疫器官的影响.
阐明DPV的UL10蛋白 (pUL10) 抑制MDA5介导的IFN-β的分子机制.
了解pUL10如何促进DPV病变和免疫逃避.

主要方法:

构建和比较野生型DPV (DPV-CHv50),pUL10缺乏DPV (DPV-UL10_stop) 和pUL10C54突变DPV (DPV-UL10_C54A).
评估病毒复制效率,免疫器官中的病毒载荷,以及小的毒性.
研究pUL10与MDA5的相互作用及其通过自细胞-溶酶体通路对MDA5的降解的影响.
在子胚胎纤维细胞中IFN-β促进体的激活和生成的分析.

主要成果:

与野生型DPV相比,DPV-UL10_stop和DPV-UL10_C54A显著减少病毒复制,病毒载量和病毒性.
pUL10直接与MDA5相互作用,通过自细胞-溶酶体通路促进其降解.
这种降解导致MDA5介导的IFN-β促进体激活和随后的IFN-β产生.
在pUL10中保存的氨酸残留物C54的突变减弱了它对IFN-β产生的抑制作用.

结论:

通过加速MDA5的降解,DPV pUL10抑制了MDA5介导的IFN-β的产生,从而促进病毒的免疫逃避.
保存的半氨酸残留物C54对于pUL10的致病性及其抑制宿主免疫反应的能力至关重要.
这些发现为DPV病变和pUL10同类所使用的免疫逃避策略提供了新的见解.

关键词:

瘟疫病毒干扰剂其他国家病毒性这是一个很好的机会.

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

Rapid, Seamless Generation of Recombinant Poxviruses using Host Range and Visual Selection

Rapid, Seamless Generation of Recombinant Poxviruses using Host Range and Visual Selection

Published on: May 24, 2020

相关概念视频

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...

Viral Recombination

Viral Recombination

Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.

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...