在树突细胞中TLR9驱动的S-棕化揭示了免疫和代谢蛋白的点
Juan N Quiroz1,2,3, Malte Sielaff4,5, Daria Kondrateva1
1Institute of Molecular Medicine, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany.
European journal of immunology
|August 19, 2025
概括
收费类受体9 (TLR9) 的激活在树突细胞 (DC) 中动态改变了蛋白质S-palmitoylation. 这项研究揭示了通过棕化对免疫信号调节的新见解,影响了关键的细胞通路.
科学领域:
- 免疫学 免疫学 免疫学
- 蛋白质组学是指蛋白质组学
- 细胞生物学 细胞生物学
背景情况:
- 树突细胞 (DCs) 使用Toll-like受体9 (TLR9) 来检测微生物DNA,从而启动免疫反应.
- 关键蛋白质修饰S-palmitoylation在TLR9信号传递中的作用仍然没有被描述.
研究的目的:
- 研究在TLR9激活时DCs的S-palmitoylated蛋白质组中的动态变化.
- 在TLR9信号传递过程中,识别受S-palmitoylation重塑影响的蛋白质和通路.
- 探索特定的棕酸转移酶 (PAT),如ZDHHC9,在DC函数中的作用.
主要方法:
- 使用基于质谱 (MS) 的蛋白质组学与17-octadecynoic acid (17-ODYA) 来分析骨髓衍生的GM-CSF DCs (GM-DCs) 中的S-palmitoylation.
- 对小鼠和人类的DC进行了转录基因分析,以评估TLR9激活对PAT编码基因的影响.
- 采用基因淘汰策略,研究ZDHHC9在DC S-palmitoylation和成熟中的功能.
主要成果:
- TLR9激活诱导了S-palmitoylation的动态重塑,丰富了免疫和代谢途径中的标.
- TLR9刺激调节了PAT编码基因在老鼠和人类DCs中的表达.
- ZDHHC9淘汰确定了候选蛋白质标,但没有影响DC成熟,这表明了补偿性PAT活性.
结论:
- 在TLR9信号通路中,S-palmitoylation代表了一种新的调节机制.
- 蛋白棕化中的动态变化对于DCs介导的免疫反应至关重要.
- 需要进一步的研究来阐明参与DC功能的PATs的完整网络.
相关概念视频
01:28Cells of the Innate Immune Response
The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
01:22T Cell Activation and Clonal Selection
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...