棕色脂肪组织中的调节性T细胞通过抑制干扰素γ产生淋巴细胞来保护热生成
Nathan W Zammit1, Ariana Vargas-Castillo2,3, P Kent Langston1
1Department of Immunology, Harvard Medical School, Boston, MA 02115, USA.
Science immunology
|July 25, 2025
概括
调节性T (Treg) 细胞控制棕色脂肪组织 (BAT) 免疫功能. 在BAT中耗尽Treg细胞释放有害的淋巴细胞,损害非热生成和代谢健康.
科学领域:
- 免疫学 免疫学 免疫学
- 代谢过程中的代谢.
- 脂肪组织生物学 脂肪组织生物学
背景情况:
- 棕色脂肪组织 (BAT) 通过非热生成分散能量.
- 众所周知,调节性T (Treg) 细胞可以调节内脏脂肪组织 (VAT).
- 在BAT中Treg细胞的作用和特征在很大程度上仍然没有特征.
研究的目的:
- 在BAT中调查Treg细胞的存在,异质性和功能.
- 确定Treg细胞枯竭对BAT免疫环境和热生成的影响.
- 阐明Treg细胞维持BAT恒温的特定机制.
主要方法:
- 在BAT中分析Treg细胞局部化和亚型组成.
- 在小鼠模型中Treg细胞的条件耗尽.
- 评估免疫细胞透,细胞因子生产 (IFN-γ) 和线粒体功能.
- 调查IL-18R1受体在Treg细胞在寒冷挑战期间的作用.
主要成果:
- 最新可用的BAT Treg细胞表现出亚组织异质性和多样化的亚型组成.
- 在BAT中Treg细胞的枯竭导致干扰素-γ (IFN-γ) 产生淋巴细胞的透.
- 这种透会导致线粒体功能障碍,代谢失调,以及受损的无热生成.
- 寒冷暴露在BAT中选择性地扩大IL-18R1+Treg细胞;这种受体对Treg细胞在温度控制中的功能至关重要.
结论:
- 通过抑制局部IFN-γ的产生,BAT Treg细胞对于维持组织平衡至关重要.
- 在BAT中调节Treg细胞功能的失调会损害免疫监测和代谢效率.
- 在BAT中准Treg细胞介导免疫控制可能为代谢障碍提供治疗途径.
更多相关视频
04:46Differentiation and Imaging of Brown Adipocytes from the Stromal Vascular Fraction of Interscapular Adipose Tissue from Newborn Mice
Published on: February 3, 2023
1.6K
08:31Visualization and Quantification of Brown and Beige Adipose Tissues in Mice using [18F]FDG Micro-PET/MR Imaging
Published on: July 1, 2021
3.2K
相关概念视频
Thermoregulation
1.3K
The human body has a sophisticated thermoregulation system that employs negative feedback mechanisms to maintain an optimal core temperature. When the core temperature drops, peripheral and central thermoreceptors send signals to the hypothalamus, activating the heat-promoting center. This center triggers several responses aimed at increasing the core temperature. First, vasoconstriction reduces the flow of warm blood from internal organs to the skin so that the heat is not lost from the skin,...
1.3K
T Cell Types and Functions
1.4K
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...
1.4K
Master Transcription Regulators
7.1K
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
7.1K
Regulation of Metabolism
9.9K
Cellular needs and conditions vary from cell to cell and change within individual cells over time. For example, the required enzymes and energetic demands of stomach cells are different from those of fat storage cells, skin cells, blood cells, and nerve cells. Furthermore, a digestive cell works much harder to process and break down nutrients during the time that closely follows a meal compared with many hours after a meal. As these cellular demands and conditions vary, so do the amounts and...
9.9K
