在先天性免疫反应中,通过dectin-1和β-glucan相互作用诱导CD83表达的机制
Naoki Arima1, Tsuyoshi Kato1, Takashi Kanno1
1Laboratory for Immunopharmacology of Microbial Products, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, Japan.
Immunology and cell biology
|August 18, 2025
概括
人类单细胞dectin-1与β-glucan的相互作用调高了CD83的表达,这对免疫调节至关重要. 不溶性β-葡萄糖更有效,涉及NFκB和NFAT通路,提供有关真菌感染和自身免疫疾病的见解.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- CD83是一种重要的免疫调节分子,在抗原呈现细胞上表达.
- 德-1受体在识别真菌β-葡萄糖和启动免疫反应方面发挥着关键作用.
- 了解CD83表达的调节对于调节各种疾病中的免疫反应至关重要.
研究的目的:
- 通过人类单细胞dectin-1和β-glucan之间的相互作用来研究CD83表达的诱导.
- 阐明涉及德-1-介导CD83表达的信号通路.
- 探索膜结合的CD83 (mCD83) 和溶性CD83 (sCD83) 之间的关系及其调节作用.
主要方法:
- 利用人类单细胞细胞系的THP-1细胞作为模型系统.
- 采用流细胞测量来分析mCD83.3的表达动态.
- 使用酶相关免疫吸收试验 (ELISA) 来量化sCD83水平.
主要成果:
- 与可溶性β-葡萄糖相比,不溶性β-葡萄糖显示出更强大的CD83表达诱导.
- 核因子-kappa B (NFκB) 和核因子激活的T细胞 (NFAT) 信号通路的激活被确定为德-1介导的CD83诱导的关键.
- 由金属蛋白酶驱动的可溶性CD83 (sCD83) 生产遵循膜结合的CD83 (mCD83) 表达,并随后抑制mCD83表达.
结论:
- 德-1-β-葡萄糖相互作用显著影响人类单细胞中的CD83表达.
- NFκB和NFAT通路是这种免疫反应的关键调解者.
- mCD83和sCD83之间的相互作用表明一个复杂的调节反循环,对真菌感染和自身免疫性疾病中的免疫调节有影响.
相关概念视频
T Cell Activation and Clonal Selection
4.5K
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...
4.5K
Receptor Downregulation in MVBs
2.1K
Multivesicular bodies (MVBs) are mature endosomes that sort ubiquitinated proteins and then fuse with lysosomes to degrade the sorted proteins. Epidermal growth factor (EGF) and its receptor (EGFR) form a complex that can be internalized through endocytosis, sorted into an MVB, and later degraded.
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...
2.1K
B Cell Activation and Differentiation
5.6K
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...
5.6K
Defense Against Bacterial Pathogens
1.5K
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
1.5K
Immunoglobulin-like Cell Adhesion Molecules
3.4K
Immunoglobulin-like cell adhesion molecules or Ig-CAMs are a versatile group of cell surface glycoproteins belonging to the immunoglobulin protein superfamily. Ig-CAMs possess the characteristic immunoglobulin protein domains and other domains such as the fibronectin type III domain. The Ig domains are glycosylated to varying degrees in different Ig-CAMs.
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...
3.4K
Cell-mediated Immune Responses
72.4K
Overview
72.4K


