脑卒中和心肌梗塞诱导中性粒细胞外细胞陷释放,破坏淋巴细胞器官结构和免疫球蛋白分泌
Ali A Tuz1, Susmita Ghosh2, Laura Karsch1
1Institute for Experimental Immunology and Imaging, University Hospital, University of Duisburg-Essen, Essen, Germany.
Nature cardiovascular research
|August 28, 2024
概括
在中风或心肌缺血 (MI) 之后,观察到免疫球蛋白A (IgA) 水平降低. 在受伤后释放的中性粒细胞外细胞陷 (NETs) 导致这种IgA损失,可以抑制.
科学领域:
- 免疫学 免疫学 免疫学
- 心血管医学 心血管医学
- 传染性疾病 传染性疾病
背景情况:
- 受伤后的免疫功能障碍,特别是幽默免疫,有助于感染和心血管疾病的不良结果.
- 免疫球蛋白A (IgA) 是最丰富的粘膜抗体,对粘膜免疫至关重要,由肠道中的血B细胞产生.
- 降低IgA水平与各种疾病状态有关,但急性心血管损伤后的机制尚不清楚.
研究的目的:
- 研究中风和心肌缺血 (MI) 对免疫球蛋白水平的影响,特别是IgA.
- 阐明导致心血管损伤后IgA降低的潜在机制.
- 探索潜在的治疗策略,以预防中风和心脏病发作患者的IgA损失.
主要方法:
- 测量中风/心脏病发作患者的血清和便中的IgA和IgG水平,以及实验小鼠模型.
- 分析肠道皮耶尔斑块 (PP) 和自身膜中的产生IgA的血细胞.
- 通过使用中性粒细胞枯竭,NET降解和NET释放阻断来研究中性粒细胞外细胞陷 (NETs) 的作用.
主要成果:
- 患有中风和心脏病发作的患者显示血清IgA水平显著降低.
- 脑卒中和心脏病发作的实验模型显示了血和便IgA的降低,伴随着IgA产生血细胞的损失.
- 在中风/心脏病发作后,中性粒细胞细胞外陷 (NETs) 的系统释放被确定为IgA产生细胞损失的原因,其抑制恢复了IgA水平.
结论:
- 脑卒中和心脏病发作造成的组织损伤会触发全身NET释放,导致生理IgA分泌的破坏.
- 这种NET介导的IgA损失有助于免疫功能障碍和心血管疾病的潜在不良结果.
- 抑制NET的形成或活动是一种有前途的治疗方法,可以保持IgA水平并减轻受伤后的免疫缺陷.
更多相关视频
08:08In Vitro Stimulation and Visualization of Extracellular Trap Release in Differentiated Human Monocyte-derived Macrophages
Published on: November 1, 2019
9.6K
11:32Real-Time, High-Throughput Microscopic Quantification of Human Neutrophil Extracellular Trap Release and Assessing the Pharmacology of Antagonists
Published on: October 18, 2024
565
相关概念视频
Inflammation
53.2K
Overview
53.2K
Blood Studies for Cardiovascular System I: Cardiac Biomarkers
119
Cardiac biomarkers are enzymes, proteins, and hormones released into the blood when cardiac cells are injured. They are powerful tools for triaging.
The essential diagnostic tools for detecting myocardial necrosis and monitoring individuals suspected of having acute coronary syndrome (ACS) include:
Troponins
Troponins, particularly cardiac troponins I and T, are the most precise and sensitive markers of myocardial injury. They are detectable within 4-6 hours of myocardial injury and remain...
The essential diagnostic tools for detecting myocardial necrosis and monitoring individuals suspected of having acute coronary syndrome (ACS) include:
Troponins
Troponins, particularly cardiac troponins I and T, are the most precise and sensitive markers of myocardial injury. They are detectable within 4-6 hours of myocardial injury and remain...
119
