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Related Concept Videos

Introduction to Innate and Adaptive Immunity01:21

Introduction to Innate and Adaptive Immunity

The human immune system is a complex defense mechanism that protects the body from harmful pathogens and foreign substances. It comprises two crucial components: innate and adaptive immunity.
Innate immunity is the body's natural, nonspecific defense system that acts quickly to protect against pathogens. It incorporates physical barriers like skin and mucous membranes and cellular elements such as phagocytes and natural killer cells. This part of our immune system provides an immediate,...
Extrinsic and Intrinsic Pathways of Hemostasis01:20

Extrinsic and Intrinsic Pathways of Hemostasis

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 forms a...
Coagulation01:09

Coagulation

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...
Coagulation01:06

Coagulation

Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

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...
Introduction to Hemostasis01:05

Introduction to Hemostasis

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, and...

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Quantification of the Respiratory Burst Response as an Indicator of Innate Immune Health in Zebrafish
07:07

Quantification of the Respiratory Burst Response as an Indicator of Innate Immune Health in Zebrafish

Published on: September 12, 2013

Innate immunity and coagulation.

C T Esmon1, J Xu, F Lupu

  • 1Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA.

Journal of Thrombosis and Haemostasis : JTH
|July 26, 2011
PubMed
Summary
This summary is machine-generated.

Infection triggers blood clotting (coagulation) by activating tissue factor and inhibiting natural anticoagulants. This response, while aiding pathogen clearance, can paradoxically cause tissue damage and organ failure.

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Assessment of the Anticoagulant and Anti-inflammatory Properties of Endothelial Cells Using 3D Cell Culture and Non-anticoagulated Whole Blood
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Stimulation of Cytoplasmic DNA Sensing Pathways In Vitro and In Vivo
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Quantification of the Respiratory Burst Response as an Indicator of Innate Immune Health in Zebrafish
07:07

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Assessment of the Anticoagulant and Anti-inflammatory Properties of Endothelial Cells Using 3D Cell Culture and Non-anticoagulated Whole Blood
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Stimulation of Cytoplasmic DNA Sensing Pathways In Vitro and In Vivo
11:44

Stimulation of Cytoplasmic DNA Sensing Pathways In Vitro and In Vivo

Published on: September 18, 2014

Area of Science:

  • Coagulation and Inflammation Biology
  • Infectious Disease Pathophysiology

Background:

  • Infection often triggers a pro-coagulant state.
  • Endotoxin initiates coagulation via tissue factor.
  • Anticoagulant pathways and fibrinolysis are suppressed during infection.

Purpose of the Study:

  • To elucidate the complex interplay between infection, coagulation, and tissue injury.
  • To understand how coagulation contributes to both host defense and organ failure.

Main Methods:

  • Review of the physiological mechanisms linking infection to coagulation.
  • Analysis of the role of endotoxin and cellular components in the response.

Main Results:

  • Infection promotes coagulation by enhancing initiation, downregulating anticoagulation (e.g., protein C pathway), and inhibiting fibrin removal.
  • Tissue destruction releases nucleosomes and histones, exacerbating inflammation and injury.
  • This complex response aims to control and clear infectious agents.

Conclusions:

  • The coagulation system plays a dual role in infection, facilitating pathogen clearance while potentially causing significant host tissue damage.
  • Dysregulation of coagulation during infection contributes to multi-organ failure.