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相关概念视频

Extrinsic and Intrinsic Pathways of Hemostasis01:20

Extrinsic and Intrinsic Pathways of Hemostasis

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Blood clotting or coagulation involves extrinsic and intrinsic pathways, which ultimately merge into the common pathway, forming a fibrin clot.
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which...
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Coagulation01:09

Coagulation

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The coagulation phase is a critical part of the body's process to prevent blood loss following injury to blood vessels. It involves chemical reactions that form a clot to seal the injured area. The clotting process begins shortly after injury, within 15-20 seconds for severe damage and 1-2 minutes for minor injuries.
During the coagulation phase, clotting factors, or procoagulants, play a vital role in initiating and progressing the coagulation cascade. This cascade is a series of reactions...
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Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

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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...
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Introduction to Hemostasis01:05

Introduction to Hemostasis

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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,...
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Clot Retraction and Fibrinolysis01:16

Clot Retraction and Fibrinolysis

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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.
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Formation of the Platelet Plug01:22

Formation of the Platelet Plug

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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...
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相关实验视频

Updated: Jun 13, 2025

Author Spotlight: Deciphering Coagulation Disorders in Traumatic Brain Injury Patients
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Author Spotlight: Deciphering Coagulation Disorders in Traumatic Brain Injury Patients

Published on: August 4, 2023

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病毒凝固:推动信封的信封.

Edward Louis George Pryzdial1, John Ruggles Perrier1, Mahamud-Ur Rashid1

  • 1Centre for Blood Research, Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada; Division of Medical Affairs and Innovation, Canadian Blood Services, Ottawa, Ontario, Canada.

Journal of thrombosis and haemostasis : JTH
|September 11, 2024
PubMed
概括
此摘要是机器生成的。

病毒可以在其包裹上劫持组织因子 (TF),触发血液凝结和炎症,影响免疫反应和病毒清除. 这种相互作用可以导致血栓形成或出血,影响疾病的严重程度.

关键词:
凝血是凝固的过程.发生出血 发生出血这是一种炎症炎症炎症炎症.血栓形成的原因是血栓形成.病毒 病毒 病毒 病毒

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Measurement of Factor V Activity in Human Plasma Using a Microplate Coagulation Assay
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Measurement of Factor V Activity in Human Plasma Using a Microplate Coagulation Assay

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A Microfluidic Flow Chamber Model for Platelet Transfusion and Hemostasis Measures Platelet Deposition and Fibrin Formation in Real-time
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A Microfluidic Flow Chamber Model for Platelet Transfusion and Hemostasis Measures Platelet Deposition and Fibrin Formation in Real-time

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相关实验视频

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Author Spotlight: Deciphering Coagulation Disorders in Traumatic Brain Injury Patients
04:56

Author Spotlight: Deciphering Coagulation Disorders in Traumatic Brain Injury Patients

Published on: August 4, 2023

705
Measurement of Factor V Activity in Human Plasma Using a Microplate Coagulation Assay
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Measurement of Factor V Activity in Human Plasma Using a Microplate Coagulation Assay

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A Microfluidic Flow Chamber Model for Platelet Transfusion and Hemostasis Measures Platelet Deposition and Fibrin Formation in Real-time
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科学领域:

  • 病毒学 病毒学
  • 血液学 血液学 血液学
  • 免疫学 免疫学 免疫学

背景情况:

  • 病毒与血液凝固系统相互作用,导致从血栓形成到出血的病理.
  • 病毒包裹,特别是来自血液传播病毒的包裹,可以携带来自宿主的蛋白质,如组织因子 (TF).

研究的目的:

  • 概述病毒成分,凝固蛋白和血液细胞之间的复杂相互作用.
  • 阐明组织因子 (TF) 在病毒诱导的血栓炎症中的作用.

主要方法:

  • 关于病毒与宿主相互作用和凝固途径的现有文献的审查.
  • 分析病毒TF影响细胞激活和血栓炎症的机制.

主要成果:

  • 病毒性TF可以绕过正常的调节通路,激活血小板,白细胞和内皮细胞.
  • 这种激活导致一种由细胞因子释放和细胞聚合特征的血栓炎环境.
  • TF介导的血栓炎症有助于对病毒清除的先天性和适应性免疫.

结论:

  • 病毒包裹上的组织因子是病毒诱导的血栓炎症的关键媒介.
  • 这一过程影响了对病毒感染的免疫反应,可能有助于病毒清除.
  • 了解这一轴对于开发针对病毒性疾病的治疗策略至关重要.