KLHL25-ACLY模块在 iTreg/Th17 的分化命运确定过程中起到关键作用
Miaomiao Tian1, Fengqi Hao1,2, Xin Jin1
1Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, Jilin, China.
Communications biology
|March 22, 2025
概括
帮助T细胞分化为iTreg或Th17细胞取决于脂肪酸代谢. 一个由TGFβ1和IL-6信号调节的新型KLHL25-ACLY分子开关,决定了这种代谢重编程和细胞命运.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞的新陈代谢
- 分子生物学分子生物学
背景情况:
- 帮助T细胞17 (Th17) 和诱导的调节性T细胞 (iTreg) 分化是关键的免疫过程.
- 这些细胞命运与不同的脂肪酸代谢途径有关: iTreg 的脂肪酸氧化 (FAO) 和 Th17 的脂肪酸合成 (FAS).
- 通过干细胞素-6 (IL-6) 重编程细胞代谢以有利于Th17分化的精确机制仍然不完全理解.
研究的目的:
- 阐明T辅助细胞分化过程中IL-6介导的代谢重编程背后的分子机制.
- 为了确定控制脂肪酸合成和脂肪酸氧化之间切换的关键调节者,以响应特定的细胞因子信号.
- 了解这些代谢变化如何影响iTreg和Th17细胞的命运决定.
主要方法:
- 研究了TGFβ1,IL-6,JNK,ERK,NF-YA,Khl25和ATP-酸酶 (ACLY) 在T细胞分化中的作用.
- 利用分子生物学技术分析基因转录,蛋白质降解和信号通路.
- 研究了这些分子事件对脂肪酸代谢和细胞命运决定的影响.
主要成果:
- TGFβ1信号激活JNK,后者通过NF-YA促进Klhl25的转录. 这导致ACLY降解,有利于脂肪酸氧化 (FAO) 和iTreg分化.
- IL-6信号酸化ERK,反过来酸化NF-YA,抑制其DNA结合. 这抑制了Klhl25转录,保持了ACLY活性,促进脂肪酸合成 (FAS),并有利于Th17分化.
- KLHL25-ACLY模块作为一个关键的分子开关,集成TGFβ1和IL-6信号以指导T辅助细胞命运.
结论:
- KLHL25-ACLY通路是iTreg/Th17细胞分化的关键决定因素,通过控制脂肪酸合成和氧化之间的切换.
- 这项研究揭示了一种新的机制,即IL-6信号重编程细胞代谢,以促进Th17细胞的发展.
- 了解这种代谢开关,可以了解适应性免疫的调节和潜在的治疗点.
相关概念视频
T Cell Types and Functions
730
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...
730
T Cell Activation and Clonal Selection
620
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...
620
B Cell Activation and Differentiation
1.3K
The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
1.3K
Cell-mediated Immune Responses
66.6K
Overview
66.6K
Antigens Involved in Adaptive Immunity
430
An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and...
Complete Antigens
Complete antigens possess both immunogenicity and...
430
Diversity of Antigen Receptors
473
Antigen receptors are essential components of the immune system crucial in defending the body against foreign invaders. These receptors are present on the surface of B and T cells, enabling them to recognize antigens and mount an appropriate immune response.
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
473


