保存的毒虫病毒膜进入融合装置组件OPG147针对MITA/STING进行免疫逃避
Xue-Mei Yi1, Mi Li1, Su-Yun Wang2
1Department of Infectious Diseases, Zhongnan Hospital of Wuhan University, Hubei Provincial Research Center for Basic Biological Sciences, Medical Research Institute, Frontier Science Center for Immunology and Metabolism, Taikang Center for Life and Medical Sciences, Wuhan University, Wuhan, Hubei, China.
PLoS pathogens
|June 11, 2025
概括
病毒使用OPG147蛋白来通过阻断cGAS-MITA/STING通路来逃避宿主免疫. 突变这种蛋白质可以增强免疫反应,并减少小鼠的疾病严重程度.
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:
- 麻疹病毒 (MPXV) 构成重大威胁,尤其对免疫力低下的人来说.
- 尚不完全理解MPXV逃避宿主免疫防御的机制.
研究的目的:
- 为了确定MPXV蛋白质参与抑制宿主天生的免疫力.
- 为了阐明MPXV OPG147在免疫逃避中的功能.
主要方法:
- 表达式查以确定免疫抑制剂.
- 同免疫沉以研究蛋白质相互作用.
- 功能性测试以评估先天性免疫通路的激活.
- 使用小鼠模型进行体内研究.
主要成果:
- 膜融合蛋白MPXV OPG147抑制了cGAS-MITA/STING介导的天生的免疫力.
- OPG147与MITA/STING和STIM1相互作用,将MITA/STING保留在内分泌网膜中.
- OPG147通过抑制ISGylation,二元化和贩运来抑制MITA/STING激活,但不结合cGAMP.
- 在疫苗病毒 (VACV) 中突变OPG147增强了先天免疫反应,降低了病毒载量,并降低了小鼠的疾病严重程度.
结论:
- OPG147是一种病毒性毒性因子,有助于病毒的免疫逃避.
- 准OPG147可能是对抗天花病毒感染的策略.
相关概念视频
Cancer Cell Migration through Invadopodia
2.4K
Invadosome is a broad category of cell surface structures with proteolytic activity that degrades the extracellular matrix (ECM). Invadosomes are present in normal cell types, including macrophages, endothelial cells, and neurons, as well as tumor cells. Although the macrophage podosomes and tumor cell invadopodia are classified as invadosomes, they have different structures, molecular pathways, and functions. Podosomes are short structures that last for a few minutes. However,...
2.4K
SNAREs and Membrane Fusion
11.0K
Once a transport vesicle has recognized its target organelle, the vesicular membrane needs to fuse with the target membrane to unload the cargo. Transmembrane proteins called SNAREs present on organelle membranes and their vesicles, mediate vesicle fusion.
SNAREs exist in pairs that symmetrically interact and catalyze the fusion of the lipid bilayers in vesicle and target organelle. v-SNARE in the vesicle membrane are single polypeptide chains that bind to a complementary t-SNARE, composed of 2...
SNAREs exist in pairs that symmetrically interact and catalyze the fusion of the lipid bilayers in vesicle and target organelle. v-SNARE in the vesicle membrane are single polypeptide chains that bind to a complementary t-SNARE, composed of 2...
11.0K
Surface Membrane Barriers
1.4K
The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
1.4K
Immune Response Against Viral Pathogens
909
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...
909
Mechanism of Filopodia Formation
2.5K
Filopodia are thin, actin-rich cellular protrusions that play an important role in many fundamental cellular functions. They vary in their occurrence, length, and positioning in different cell types, suggesting their diverse roles.
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
2.5K
Immunoglobulin-like Cell Adhesion Molecules
3.4K
Immunoglobulin-like cell adhesion molecules or Ig-CAMs are a versatile group of cell surface glycoproteins belonging to the immunoglobulin protein superfamily. Ig-CAMs possess the characteristic immunoglobulin protein domains and other domains such as the fibronectin type III domain. The Ig domains are glycosylated to varying degrees in different Ig-CAMs.
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...
3.4K


