I型干扰素信号传递和过氧体功能障碍有助于增强IRGM1缺陷巨细胞中炎症性细胞因子的产生
Brian E Fee1, Lanette R Fee1, Mark Menechella1
1Department of Medicine, Division of Geriatrics, and Center for the Study of Aging and Human Development; Duke University Medical Center, Durham, North Carolina, USA.
The Journal of biological chemistry
|October 12, 2024
概括
该IRGM基因调节炎症反应. 它在巨细胞中的缺陷增加了由过氧体失调和I型干扰素生产驱动的炎症性细胞因子,为炎症性疾病提供了新的见解.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- IRGM基因与诸如败血症和克罗恩病等炎症性疾病有关.
- 减少IRGM表达会增加炎症性化学激素和细胞激素,这与代谢和线粒体变化有关.
研究的目的:
- 阐明将IRGM缺乏与炎症性细胞因子产生增加的综合机制.
- 为了研究I型干扰素和Igm1-缺乏巨细胞中的代谢变化的作用.
主要方法:
- 在Irgm1淘汰赛 (Irgm1-/-) 骨髓衍生巨细胞 (BMM) 上进行RNA深度测序和定量PCR.
- 分析新陈代谢变化,包括糖解和甲氨酸积累.
- 对过氧体内稳态和I型干扰素信号的研究.
主要成果:
- 增加的细胞因子产生和转录Irgm1-/- BMM的变化在很大程度上取决于I型干扰素的升高.
- 在Irgm1-/- BMM中发生的代谢变化 (糖解,甲) 是独立于I型干扰素信号传递的.
- 皮氧体平衡失调被确定为I型干扰素和炎症性细胞因子生产的新型上游调节剂.
结论:
- 缺少Irgm1导致炎症性细胞因子的产生增加,主要是通过I型干扰素,以过氧体失调作为关键的上游途径.
- 了解这些生化变化,可以了解与IRGM缺乏相关的炎症性疾病.
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
T Cell Types and Functions
960
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...
960


