相关实验视频

Updated: Jan 10, 2026

Microfluidics in Assessing Platelet Function

Microfluidics in Assessing Platelet Function

Published on: November 8, 2024

收费类受体7的缺乏减轻了血小板功能障碍在败血症

Rashida Mohamed-Hinds¹, Arijit Dutta¹, Chanhee Park¹

¹Translational Research Program, Department of Anesthesiology, Center for Shock, Trauma and Anesthesiology Research, University of Maryland School of Medicine, Baltimore, MD 21201, USA.

|November 27, 2025

概括

托尔类受体-7 (TLR7) 信号加剧了败血症引起的血小板功能障碍和细胞外囊泡 (EV) 活动. 缺少TLR7可保持血小板功能,并减少致病性EV效应,这表明TLR7是治疗点.

科学领域:

免疫学免疫学免疫学
血液学血液学血液学
病理生理学病理生理学

背景情况:

败血症涉及异常的宿主对感染的反应,通常导致血小板缩和血小板功能障碍,这会使患者的结果恶化.
托尔类受体-7 (TLR7) 是一种先天性免疫传感器,与毒症相关的血栓细胞衰减有关.
对于TLR7在败血症引起的血小板功能障碍中的作用以及对细胞外囊泡 (EV) 生物活性的影响尚不清楚.

研究的目的:

调查TLR7信号传递对败血症中血小板功能障碍的贡献.
确定TLR7信号是否影响败血症相关的细胞外囊泡 (EVs) 的生物活性.

主要方法:

在野生型和TLR7缺乏的小鼠中,通过结和穿孔诱导了败血症.
通过聚合,粘附和流量测试来评估血小板功能.
从血中分离出细胞外囊泡 (EV),并在体外评估它们在血小板-白细胞聚合物 (PLA) 形成中的作用.

主要成果:

败血栓血小板表现出过度活化和增强的粘附性,但损害了聚合和信号,表明功能疲劳.
与野生类型对照组相比,TLR7缺乏的小鼠表现出保存的血小板聚合,增强的粘附性和维持的释放.
败血症增加了血EV的丰度和大小,促进了血栓和PLA的形成;当使用TLR7缺乏小鼠的EV时,这种EV介导的血小板激活减少了.

结论:

败血症诱导持续的血小板激活和功能障碍,这部分是通过TLR7缺乏减轻.
TLR7信号关键调节了败血症中EVs的致病活性,影响了血小板功能.
向TLR7可能提供一种治疗策略,以保持血小板功能并减轻败血症的不良结果.

关键词:

收费类受体 7 收费类受体 7 细胞外囊泡中的细胞外囊泡.这是一种炎症炎症炎症炎症.血小板血小板是已经有了血症.败血症引起的血小板功能障碍

更多相关视频

Comprehensive Analysis of Procoagulant Platelets Exhibiting Features of Necrosis, Apoptosis and Platelet Activation

Comprehensive Analysis of Procoagulant Platelets Exhibiting Features of Necrosis, Apoptosis and Platelet Activation

Published on: May 23, 2025

Screening Bioactive Nanoparticles in Phagocytic Immune Cells for Inhibitors of Toll-like Receptor Signaling

Screening Bioactive Nanoparticles in Phagocytic Immune Cells for Inhibitors of Toll-like Receptor Signaling

Published on: July 26, 2017

相关概念视频

Formation of the Platelet Plug

Formation of the Platelet Plug

The platelet phase, the second stage of hemostasis, commences around 15-20 seconds after an injury. It follows and overlaps with the vascular phase, during which blood vessels constrict to minimize blood loss.
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...

Structure and Function of Platelets

Structure and Function of Platelets

The cell fragments known as platelets are disc-shaped, with an average diameter of about 3 μm and a thickness of roughly 1 μm. They play a crucial role in the body's vascular clotting system, which also involves plasma proteins, blood cells, and blood vessel tissues.
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000...