通过调节STING激活和循环循环,ARF1可以防止异常的I型干扰素诱导
Maximilian Hirschenberger1, Alice Lepelley2, Ulrich Rupp3
1Institute of Molecular Virology, Ulm University Medical Center, 89081, Ulm, Germany.
Nature communications
|November 2, 2023
概括
ADP-ribosylation factor 1 (ARF1) 突变破坏了I型干扰素 (IFN) 的信号调节. 这导致IFN活性增强,并通过影响线粒体完整性和STING蛋白回收而产生新型干扰性.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 遗传学 是一个遗传学.
背景情况:
- I型干扰素 (IFN) 信号传递对免疫力至关重要,但需要严格监管.
- 循环GMP-AMP合成酶 (cGAS) 刺激干扰素基因 (STING) 途径在检测DNA时启动IFN反应.
- STING贩运和退化是终止IFN信号的关键控制点.
研究的目的:
- 为了确定cGAS-STING通路的新型调节剂.
- 研究ADP-ribosylation factor 1 (ARF1) 在IFN信号传递中的作用.
- 为了描述与ARF1突变相关的新发现的干扰性病变.
主要方法:
- 对患者衍生细胞的分析,这些细胞具有异性ARF1误解突变.
- 细胞测试以评估cGAS-STING通路激活和IFN刺激的基因表达.
- 调查STING贩运,线粒体形态和逆行运输.
主要成果:
- 异卵性ARF1误解突变会导致一种新型I型干扰性病变.
- 有GTPase缺陷的ARF1增强了cGAS-STING依赖的IFN信号传输.
- 突变的ARF1破坏了线粒体的完整性,导致异常DNA释放和STING在戈尔吉/ERGIC积累.
结论:
- ARF1作为cGAS-STING信号传输的关键负调节器.
- ARF1突变会损害线粒体平衡和STING循环,破坏IFN反应的调节.
- 通过线粒体完整性和STING回收利用,ARF1在维持cGAS-STING通路平衡方面具有双重作用.
相关概念视频
Regulation of the Unfolded Protein Response
2.4K
Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...
2.4K
Immune Response Against Viral Pathogens
795
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...
795
NF-κB-dependent Signaling Pathway
7.5K
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...
7.5K
Inflammatory Response
2.1K
An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
2.1K
The Extrinsic Apoptotic Pathway
6.4K
The extrinsic apoptotic pathway is initiated when extracellular death-inducing signals, such as specific cytokines, activate the death receptors expressed on the cell surface. The immune cells involved in this pathway are natural killer cells (NK cells) and cytotoxic T-lymphocytes. NK cells are critical in innate immune response, while cytotoxic T-lymphocytes are associated with adaptive immune response. These cells recognize specific receptors expressed on the altered cells and activate...
6.4K
The Unfolded Protein Response
4.7K
The ER is the hub of protein synthesis in a cell. It has robust systems to quality control protein folding and also for degradation of terminally misfolded proteins. Under normal conditions, a small proportion of misfolded proteins that cannot be salvaged need to be transported to the cytoplasm by the ER-associated degradation or ERAD pathways. However, if the ERAD cannot handle the misfolded proteins, the cell activates the unfolded protein response or UPR to adjust the protein folding...
4.7K


