通过依赖于STAT4的序列内效应,TIGIT可以逆转IFN-α促进的Th1-类Tregs
Shihan Yu1,2, Jia Gu1,3, Rui Wang1
1Department of Pediatrics, The First Hospital of China Medical University, No.155, Nanjingbei Street, Heping District, Shenyang, 110001, China.
Arthritis research & therapy
|November 18, 2023
概括
干扰素-α (IFN-α) 通过促进Th1-类Tregs来驱动狼中调节性T细胞 (Treg) 功能障碍. 激活TIGIT可以恢复Treg功能,为系统性红斑狼 (SLE) 提供潜在的治疗策略.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 自免疫性疾病 自免疫性疾病
背景情况:
- 系统性红斑狼 (SLE) 的特征是免疫失调.
- 调节性T细胞 (Tregs) 对于维持免疫耐受性至关重要.
- 干扰素-α (IFN-α) 参与了SLE的发病,但它对Tregs的特定影响是复杂的.
研究的目的:
- 研究IFN-α对SLE患者Treg分化和功能的影响.
- 探索TIGIT在调节Treg响应中的作用.
- 阐明参与IFN-α诱导的Treg变化的信号通路.
主要方法:
- 通过流细胞测量对SLE患者和健康对照组Tregs的表型和激活分析.
- 在体外培养模型模拟了序列内和序列外的IFN-α刺激.
- 对Treg极化和信号通路 (AKT,mTOR,STATs) 的TIGIT激动剂作用的评估.
主要成果:
- SLE患者表现出增加的Th1-like Tregs和Treg激活,并减少了TIGIT表达.
- 在序列刺激下,IFN-α促进了Treg转化为Th1-类Treg,从而损害了免疫抑制.
- STAT4通路的激活对IFN-α的序列效应至关重要;TIGIT的再激活通过抑制AKT/mTOR和STAT4信号来逆转Th1极化.
结论:
- 由IFN-α诱导的序列效应有助于SLE中的Th1-like Treg扩张.
- TIGIT具有作为治疗点的潜力,可以恢复Treg在SLE中的免疫抑制功能.
相关概念视频
TGF - β Signaling Pathway
7.4K
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...
7.4K
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
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
T Cell Activation and Clonal Selection
747
T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
Naive T cells that have not yet encountered an antigen express two primary CD...
747
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


