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Formation of the Platelet Plug01:22

Formation of the Platelet Plug

5.6K
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...
5.6K
Structure and Function of Platelets01:18

Structure and Function of Platelets

1.1K
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...
1.1K
Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors01:20

Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors

507
Antiplatelet drugs emerge as frontline defenders against the insidious threat of thromboembolic diseases, where abnormal clots obstruct vital blood vessels. These drugs stand as bulwarks, inhibiting platelet aggregation and clot formation, thereby mitigating the risk of life-threatening conditions like myocardial infarction, coronary artery disease, and thrombotic strokes.
Prostaglandin synthesis inhibitors, exemplified by the widely known aspirin, wield their power by irreversibly acetylating...
507
Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

663
Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
663
Introduction to Hemostasis01:05

Introduction to Hemostasis

7.0K
Hemostasis is a complex physiological process that prevents excessive bleeding when a blood vessel is injured. It's crucial for maintaining the integrity of the circulatory system, as it ensures that our blood remains fluid while still within the vascular network and yet clots to prevent blood loss upon vessel injury.
The three phases of hemostasis involve many clotting factors present in plasma and several substances released by platelets and injured tissue cells. It is a fast, localized,...
7.0K
Clot Retraction and Fibrinolysis01:16

Clot Retraction and Fibrinolysis

5.3K
After a fibrin clot is formed, the next step is clot retraction, a vital process facilitated by platelet contractile proteins, such as actin and myosin. These proteins pull the fibrin strands closer together and condense the clot. This action reduces the size of the clot, creating a smaller, denser structure that effectively seals off the damaged vessel. Clot retraction consolidates the clot and helps with wound healing by bringing the edges of the damaged blood vessel closer together.
5.3K

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相关实验视频

Updated: Jun 20, 2025

Ferric Chloride-induced Murine Thrombosis Models
10:37

Ferric Chloride-induced Murine Thrombosis Models

Published on: September 5, 2016

21.6K

一把双刃剑:工程纳米粒子和血小板之间的复杂相互作用.

Yathreb Asaad1, Danielle Nemcovsky-Amar1, Josué Sznitman1

  • 1Department of Biomedical Engineering Technion-Israel Institute of Technology Haifa Israel.

Bioengineering & translational medicine
|July 22, 2024
PubMed
概括

纳米粒子 (NP) 影响血小板,影响其激活或抑制. 了解这些血小板-NP相互作用对于安全的纳米医学开发和治疗应用至关重要.

关键词:
毒品运输商 毒品运输商血液静止 血液静止 血液静止纳米颗粒是一种纳米粒子.物理化学参数 物理化学参数血小板 血小板 是系统的交付系统的交付血栓形成的原因是血栓形成.

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Real-time Imaging of Heterotypic Platelet-neutrophil Interactions on the Activated Endothelium During Vascular Inflammation and Thrombus Formation in Live Mice
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Real-time Imaging of Heterotypic Platelet-neutrophil Interactions on the Activated Endothelium During Vascular Inflammation and Thrombus Formation in Live Mice

Published on: April 2, 2013

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Routine Screening Method for Microparticles in Platelet Transfusions
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Routine Screening Method for Microparticles in Platelet Transfusions

Published on: January 31, 2018

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相关实验视频

Last Updated: Jun 20, 2025

Ferric Chloride-induced Murine Thrombosis Models
10:37

Ferric Chloride-induced Murine Thrombosis Models

Published on: September 5, 2016

21.6K
Real-time Imaging of Heterotypic Platelet-neutrophil Interactions on the Activated Endothelium During Vascular Inflammation and Thrombus Formation in Live Mice
11:18

Real-time Imaging of Heterotypic Platelet-neutrophil Interactions on the Activated Endothelium During Vascular Inflammation and Thrombus Formation in Live Mice

Published on: April 2, 2013

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Routine Screening Method for Microparticles in Platelet Transfusions
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Routine Screening Method for Microparticles in Platelet Transfusions

Published on: January 31, 2018

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科学领域:

  • 纳米医学是一种纳米医学.
  • 生物材料科学 生物材料科学
  • 血液学 血液学 血液学

背景情况:

  • 纳米粒子 (NP) 是纳米医学的关键,用于向药物输送.
  • 系统性NP注射导致与血液细胞,特别是血小板的直接相互作用.
  • 由于潜在的健康结果,对NP暴露的血小板反应至关重要.

研究的目的:

  • 审查各种纳米粒子类型对血小板功能的影响.
  • 要突出控制血小板-纳米粒子相互作用的物理化学参数.
  • 识别知识差距,并建议未来的研究方向在血小板-NP相互作用.

主要方法:

  • 关于纳米粒子-血小板相互作用的现有科学文献的综述.
  • 聚合物,陶,,树脂和金属纳米粒子的讨论.
  • 专注于影响血小板反应的物理化学性质.

主要成果:

  • 纳米颗粒可以增加血液静止或抑制血栓形成.
  • 物理化学参数在很大程度上决定了纳米颗粒对血小板的影响.
  • 不同的NP类型对血小板激活和功能产生不同的影响.

结论:

  • 了解血小板-纳米粒子相互作用对于纳米医药的安全性和有效性至关重要.
  • 存在重大知识差距,需要进一步调查.
  • 开发改进的研究方法和指导方针至关重要,包括生物仿真体外模型.