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Related Concept Videos

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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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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Factors Affecting the Risk of Infection01:26

Factors Affecting the Risk of Infection

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The hosts' susceptibility to infection depends on several factors. The integrity of the skin and mucous membranes helps protect the body against microbial attacks. When the skin is altered, the chance of infection, limb loss, and even death increases.
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Cystic fibrosis (CF), an autosomal recessive disorder, significantly affects the function of exocrine glands. This genetically inherited disease is characterized by the production of thick and sticky mucus, which can severely affect various organs and systems in the body.
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Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

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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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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.
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Related Experiment Video

Updated: Aug 27, 2025

Author Spotlight: High-Sensitivity Tissue Factor Activity Assay for Plasma Diagnosis
03:53

Author Spotlight: High-Sensitivity Tissue Factor Activity Assay for Plasma Diagnosis

Published on: December 29, 2023

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Tissue Factor and COVID-19: An Update.

Ana Teresa Azevedo Sachetto1,2,3, Nigel Mackman3

  • 1Laboratory of Pathophysiology, Butantan Institute, São Paulo, São Paulo, Brazil.

Current Drug Targets
|September 27, 2022
PubMed
Summary
This summary is machine-generated.

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection increases tissue factor (TF) expression, leading to blood clots and higher mortality in COVID-19 patients. TF may be a therapeutic target for reducing COVID-19 complications.

Keywords:
COVID-19CoagulationSARS-CoV-2extracellular vesiclesthrombosistissue factor

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Related Experiment Videos

Last Updated: Aug 27, 2025

Author Spotlight: High-Sensitivity Tissue Factor Activity Assay for Plasma Diagnosis
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Flow Cytometry Analysis of Tissue Factor Expression in Human Platelets
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Area of Science:

  • Virology
  • Hematology
  • Immunology

Background:

  • The COVID-19 pandemic, caused by SARS-CoV-2, is linked to severe respiratory distress, thrombosis, and mortality.
  • Tissue factor (TF) expression is known to increase during infections, playing a role in coagulation.
  • The precise role of TF in SARS-CoV-2 infection and associated thrombotic events requires further elucidation.

Conclusions:

  • Tissue factor (TF) plays a critical role in the pathogenesis of thrombosis associated with COVID-19.
  • Elevated TF expression serves as a potential prognostic indicator for COVID-19 severity and mortality.
  • Targeting TF may offer a promising therapeutic strategy to mitigate thrombosis and inflammation in COVID-19 patients.