通过准TBK1,TRIM28促进了I型干扰素的激活
Fang Hua1, Tim Nass1, Kislay Parvatiyar1
1Department of Microbiology and Immunology, Tulane University School of Medicine, New Orleans, LA, United States.
Frontiers in immunology
|March 18, 2024
概括
含有28 (TRIM28) 的三部分基因通过调节TBK1信号来促进抗病毒免疫反应的激活. TRIM28对于宿主防御病毒感染至关重要,因为它缺少会损害干扰素的产生,增加对病毒的敏感性.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 病毒学 病毒学
背景情况:
- I型干扰素对抗病毒的天生的免疫力至关重要,诱导抗病毒基因抑制复制.
- 干扰素激活依赖于IRF3转录因子,在病毒感染期间由TBK1激酶酸化.
- 对于IRF3信号的TBK1激活的精确机制尚未完全理解.
研究的目的:
- 为了确定I型干扰素激活的新型调节剂.
- 阐明含有28 (TRIM28) 的三方基因在抗病毒信号传输中的作用.
- 了解TRIM28如何促进TBK1激活和随后的抗病毒反应.
主要方法:
- 在CRISPR-Cas9基因编辑中创建TRIM28淘汰细胞.
- 使用RNA和DNA病毒进行病毒挑战测试.
- 共同免疫沉以研究蛋白质相互作用 (TRIM28和TBK1).
- 对翻译后的修改 (K63相关的泛化) 和蛋白质酸化 (TBK1,IRF3) 的分析.
主要成果:
- 对TRIM28的遗传删除损害了对RNA和DNA病毒的I型干扰素激活.
- TRIM28淘汰赛细胞显示对病毒感染的易感性增加.
- TRIM28与TBK1直接相互作用,并调解了TBK1.1的K63链接的泛基化.
- TRIM28缺乏导致TBK1酸化缺陷,TBK1-IRF3复合体形成减少,IRF3酸化受损.
结论:
- 通过促进TBK1信号传递,TRIM28作为I型干扰素激活的积极调节剂.
- TRIM28是E3泛素酶活性的一种新型基质,促进抗病毒免疫力.
- TRIM28对于通过TBK1-IRF3途径控制先天性抗病毒免疫反应至关重要.
更多相关视频
相关概念视频
TGF - β Signaling Pathway
7.3K
The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors...
7.3K
The JAK-STAT Signaling Pathway
8.9K
Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as SH2...
8.9K
NF-κB-dependent Signaling Pathway
7.4K
The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
NF-κB-dependent Signaling Mechanism
The...
NF-κB-dependent Signaling Mechanism
The...
7.4K
Receptor Downregulation in MVBs
2.1K
Multivesicular bodies (MVBs) are mature endosomes that sort ubiquitinated proteins and then fuse with lysosomes to degrade the sorted proteins. Epidermal growth factor (EGF) and its receptor (EGFR) form a complex that can be internalized through endocytosis, sorted into an MVB, and later degraded.
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...
2.1K
T Cell Types and Functions
1.0K
When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
1.0K
Drugs for Treatment of Crohn's Disease in IBD Using Biologic Agents: Anti-TNF
137
Tumor Necrosis Factor (TNF), a proinflammatory cytokine, contributes significantly to the inflammation seen in Crohn's disease. It exists as soluble TNF and membrane-bound TNF, with actions mediated through TNF receptors (TNFR). TNFR activation leads to the release of proinflammatory cytokines, T-cell activation, collagen production, and leukocyte migration, all contributing to inflammation in Crohn's disease. Anti-TNF monoclonal antibodies, namely infliximab (Remicade), adalimumab...
137


