抗SARS-CoV-2高峰IgA2诱导人类巨细胞的炎症
Lynn Mes1,2, Jennifer Veth1,2, Julie Van Coillie3
1Center for Infection and Molecular Medicine, Amsterdam University Medical Center (UMC), University of Amsterdam, Amsterdam, The Netherlands.
European journal of immunology
|October 7, 2025
概括
严重的COVID-19涉及免疫过度炎症. 这项研究表明,抗尖峰免疫球蛋白A (IgA),特别是IgA2,通过巨细胞激活来放大这种炎症,这表明了新的治疗点.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 病理生理学 病理生理学
背景情况:
- 严重的COVID-19的特征是免疫性超炎症,IgG抗体参与激活膜巨细胞.
- 免疫球蛋白A (IgA) 的作用是最丰富的呼吸道免疫球蛋白,在COVID-19的发病过程中仍然在很大程度上未被探索.
- 一般来说,IgA被认为是非炎症性,与严重感染中IgG已知的炎症前作用形成鲜明对比.
研究的目的:
- 为了研究抗SARS-CoV-2尖端IgA在严重的COVID-19中潜在的促炎作用.
- 阐明IgA介导炎症的潜在机制,重点关注特定的IgA子类和信号通路.
- 为了确定潜在的治疗目标,以减轻严重的冠状病毒感染中的超炎症.
主要方法:
- 用抗尖峰IgA免疫复合体和病毒刺激刺激巨细胞的刺激.
- 分析促炎性细胞因子的产生.
- 研究IgA2亚类的参与,FcαRI-Syk信号传递,糖解和线粒体功能.
主要成果:
- 抗尖峰IgA,特别是IgA2亚类,显著放大了巨细胞中促炎性细胞因子的产生.
- 诱导IgA2的炎症依赖于FcαRI-Syk信号,并涉及增强的葡萄糖分解和改变的线粒体功能.
- 在重病COVID-19患者的血中观察到IgA2水平升高.
结论:
- 在严重的COVID-19中,IgA2通过特定的信号和代谢途径驱动高炎症,发挥病原性作用.
- 针对IgA2介导的信号级联和代谢重编程,为严重的冠状病毒感染提供了潜在的治疗策略.
- 这些发现扩展到其他严重的冠状病毒疾病,如SARS和MERS,以及未来的疫情.
更多相关视频
11:48Isolation Protocol of Mouse Monocyte-derived Dendritic Cells and Their Subsequent In Vitro Activation with Tumor Immune Complexes
Published on: May 31, 2018
11.9K
10:35Assessment of Antibody-based Drugs Effects on Murine Bone Marrow and Peritoneal Macrophage Activation
Published on: December 26, 2017
8.6K
相关概念视频
01:29Coronavirus
Coronaviruses, including the severe acute respiratory syndrome coronavirus (SARS-CoV), are enveloped viruses characterized by their single-stranded, positive-sense RNA genome and helical nucleocapsid structure. The hallmark of these viruses is their club-shaped spike (S) glycoproteins that protrude from the viral envelope, facilitating attachment to host cells. Typically, coronaviruses infect the upper respiratory tract, often causing mild or asymptomatic disease. However, certain strains like...
01:26Acute Inflammation I: Inflammatory Response
Acute inflammation is a rapid, short-lived physiological response to tissue injury or infection, designed to eliminate harmful agents and initiate repair. This tightly regulated process typically lasts from minutes to several days and is triggered by factors such as microbial invasion, physical trauma, or chemical injury.Recognition and Mediator ReleaseThe inflammatory response begins when resident immune cells—such as mast cells, macrophages, and dendritic cells—detect damage-associated...
01:10Antibody Structure
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...