阿尔法特异性人类IgE促进了阿尔法诱导的和抗原独立的过敏效应细胞激活
Yinghui Wang1, Yugen Zhang2, Christa Dudley2
1Division of Rheumatology, Allergy, and Immunology and Thurston Arthritis Research Center; Allergy Mast Cell Disorders Program, Department of Medicine; Department of Pediatrics, Food Allergy Initiative, Division of Allergy and Immunology.
The Journal of allergy and clinical immunology
|January 14, 2026
概括
阿尔法-加尔综合征 (AGS) 涉及对阿尔法-加尔的IgE抗体. 这项研究表明,某些特定于α-gal的IgE可能会在没有抗原的情况下激活过敏细胞,这可能会影响AGS症状的严重程度.
科学领域:
- 免疫学 免疫学 免疫学
- 过敏研究 研究过敏
- 葡萄糖生物学 葡萄糖生物学
背景情况:
- 阿尔法-加尔综合征 (AGS) 的特征是对哺乳动物产品中发现的阿尔法-加尔甘氨酸的IgE抗体.
- 虽然α-抗原会激活AGS患者的基,但单独针对α-的IgE在细胞激活中的作用尚不清楚.
研究的目的:
- 调查alpha-gal抗原是否可以激活表达人类IgE受体的被动敏感的老鼠基细胞白血病 (RBL) 细胞.
- 为了确定与其他血清蛋白质独立的α-gal特异性IgE是否足以激活基细胞和巨细胞.
主要方法:
- 使用CRISPR创建了一种新的α-缺乏RBL细胞系 (AGKO RBL SX-38).
- 通过AGS患者血清或α-gal特异性IgE克隆被动敏感的细胞.
- 用α-糖蛋白刺激细胞和测量CD63表达和β-hexosaminidase释放.
主要成果:
- 经过AGS血清敏感化的AGKO RBL SX-38细胞在α-gal刺激后显示CD63+细胞增加了3倍.
- 特定的人类AGS IgE克隆诱导CD63上调,无论依赖或独立于α-gal抗原.
- 没有观察到与alpha-gal特异性IgE克隆的显著β-hexosaminidase释放.
结论:
- 一些特定于α-gal的IgE克隆可以在没有抗原的情况下部分激活过敏效应细胞.
- 这种抗原独立激活可以降低AGS患者随后过敏反应的门.
- 研究结果表明,潜在的机制会影响AGS症状的持续时间和严重程度.
相关概念视频
B Cell Activation and Differentiation
16.0K
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...
16.0K
Antibody Structure
65.3K
Overview
Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced by B cells and make up 20 percent of the total blood plasma by weight. In mammals, antibodies fall into five different classes, which each elicits a different biological response upon antigen binding.
The Y-Shaped Structure of Antibodies Consists of Four Polypeptide Chains
Antibodies consist of four polypeptide chains: two identical heavy...
Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced by B cells and make up 20 percent of the total blood plasma by weight. In mammals, antibodies fall into five different classes, which each elicits a different biological response upon antigen binding.
The Y-Shaped Structure of Antibodies Consists of Four Polypeptide Chains
Antibodies consist of four polypeptide chains: two identical heavy...
65.3K
Antigens Involved in Adaptive Immunity
1.3K
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...
1.3K
T Cell Activation and Clonal Selection
14.8K
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...
14.8K
Allergic Reactions
32.0K
Overview
32.0K
T Cell Types and Functions
2.2K
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...
2.2K


