在SLE中,sNASP突变通过TAK1通路加剧TLR4介导炎症
Yatao Bao1, Meng Lian1, Yong Chen1
1School of Basic Medical Science, Weifang Medical University, Weifang 261053, China.
Journal of immunology research
|September 29, 2023
概括
突变的体质核自身抗原性精子蛋白 (sNASP) 基因通过增强巨细胞中的Toll-like受体4 (TLR4) 信号传递来促进全身性红斑狼 (SLE). 这一发现揭示了自身免疫性疾病发展的关键机制.
科学领域:
- 免疫学 免疫学 免疫学
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
背景情况:
- 遗传因素显著影响全身性红斑狼 (SLE) 病变的发生.
- 异常的托尔类受体 (TLR) 信号传递与SLE发作有关.
- 突变体质核自身抗原性精子蛋白 (sNASP) 在SLE发育中的作用需要机械阐明.
研究的目的:
- 研究sNASP基因突变对巨细胞中TLR信号通路的影响.
- 阐明sNASP突变导致自身免疫性炎症的分子机制.
主要方法:
- 用不同度的脂多糖酸盐刺激了小鼠腹性巨细胞.
- 对TLR4-TAK1和TLR4-TBK1信号通路激活的分析.
- 评估TLR4介导的核因子-κB (NF-κB) 和基激活蛋白激酶 (MAPK) 的激活.
- 量化IL-6和瘤亡因子 (TNF) 的分泌.
主要成果:
- sNASP基因突变显著促进了TLR4-TAK1信号通路的反应.
- 在TLR4-TBK1信号通路上没有观察到sNASP突变的显著影响.
- 在sNASP突变的巨细胞中观察到增强的TLR4介导的NF-κB和MAPK激活.
- 检测到IL-6和TNF的分泌量增加.
结论:
- sNASP基因突变增强了小鼠腹巨细胞中TLR4受体的敏感性.
- 这项研究强调了涉及sNASP在促进SLE等自身免疫性疾病的炎症中的潜在机制.
相关概念视频
The JAK-STAT Signaling Pathway
9.0K
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...
9.0K
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
T Cell Types and Functions
1.1K
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...
1.1K
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
MAPK Signaling Cascades
5.6K
Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...
5.6K


