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Related Concept Videos

Inflammatory Response01:28

Inflammatory Response

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An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
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Responses to Salt Stress02:02

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Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
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Responses to Heat and Cold Stress02:45

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Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
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Inflammatory Response II: Inflammatory Exudate and Tissue Repair01:24

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The immune system's inflammatory response destroys the invading pathogen, permitting the tissue to heal. The changes during the cellular and vascular stages allow exudate formation at the site of inflammation. The inflammatory exudate released from the wound has high protein content and a specific gravity above 1.020.
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Stress Response System01:21

Stress Response System

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The stress response system, also known as the fight-or-flight response, is the body's automatic physiological reaction to perceived threats. Hans Selye introduced the concept of General Adaptation Syndrome (GAS) to describe the predictable pattern of changes that occur in response to stress. GAS consists of three sequential stages: alarm, resistance, and exhaustion. This model helps explain how chronic stress can contribute to health problems.
Alarm stage
In the alarm stage, the body's...
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Inflammatory Response I: Vascular and Cellular01:30

Inflammatory Response I: Vascular and Cellular

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The inflammatory response is the body's defense against infection, injury, or irritation from bacteria, trauma, toxins, or heat. Inflammation helps locate and destroy pathogens and remove damaged tissue elements to heal the body. During this initial phase, fluid, blood products, and nutrients migrate to the injured area, resulting in redness, heat, swelling, ache, and loss of function. Moreover, signs of systemic inflammation include fever, increased WBC count, malaise, anorexia, nausea,...
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Related Experiment Video

Updated: Jan 22, 2026

Procoagulant Platelet Characterization by Measuring Phosphatidylserine Exposure and Microvesicle Release from Human Purified Platelets
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Procoagulant Platelet Characterization by Measuring Phosphatidylserine Exposure and Microvesicle Release from Human Purified Platelets

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Platelet Inflammatory Response to Stress.

Fabrice Cognasse1,2, Sandrine Laradi1,2, Philippe Berthelot2,3

  • 1Etablissement Français du Sang Auvergne-Rhône-Alpes, Saint-Étienne, France.

Frontiers in Immunology
|July 19, 2019
PubMed
Summary
This summary is machine-generated.

Blood platelets are crucial for hemostasis and immune defense, sensing danger signals like pathogen-associated molecular patterns (PAMPs) and damage-associated molecular patterns (DAMPs) to regulate inflammation and repair tissues.

Keywords:
cytokine/chemokineinflammationinnate immunityplateletstransfusion

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Area of Science:

  • Hematology
  • Immunology
  • Cell Biology

Background:

  • Blood platelets are essential for hemostasis, vascular repair, and immune defense.
  • Platelets produce and secrete cytokines and chemokines, mediating inflammatory responses.
  • They possess pathogen recognition receptors (PRRs) to detect danger signals.

Purpose of the Study:

  • To review the multifaceted roles of platelets in immune responses and inflammation.
  • To highlight platelet sensing of pathogen-associated molecular patterns (PAMPs) and damage-associated molecular patterns (DAMPs).
  • To emphasize the inflammatory response to stress function of platelets.

Main Methods:

  • Literature review of recent data on platelet function in immunity and inflammation.
  • Analysis of platelet interactions with danger signals (PAMPs and DAMPs).
  • Examination of platelet secretory capacity and stress responses during storage.

Main Results:

  • Platelets actively sense and respond to infectious and non-infectious danger signals.
  • They utilize pathogen recognition receptors, including Toll-like receptors, for differential sensing.
  • Platelets regulate innate immunity and pathogen clearance through complex signaling pathways.

Conclusions:

  • Platelets are key mediators of inflammation, bridging hemostasis and immunity.
  • Their ability to sense danger signals and respond to stress is critical in infectious and non-infectious contexts.
  • Platelet function extends beyond clotting to encompass a significant role in innate immune regulation.