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Related Concept Videos

Inflammation01:38

Inflammation

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Overview
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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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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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Inflammatory Response II: Inflammatory Exudate and Tissue Repair01:24

Inflammatory Response II: Inflammatory Exudate and Tissue Repair

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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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Phases of Wound Repair01:28

Phases of Wound Repair

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Following injury, the integrity of the injured tissues must be reestablished. For example, in skin tissue, wound repair involves coordination among resident skin cells, blood mononuclear cells, extracellular matrix, growth factors, and cytokines to complete the healing cascade.
Formation of Blood Clot
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Introduction to Innate and Adaptive Immunity01:21

Introduction to Innate and Adaptive Immunity

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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.
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Updated: Aug 18, 2025

An Epithelial Abrasion Model for Studying Corneal Wound Healing
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Innate Immune System Activation, Inflammation and Corneal Wound Healing.

Nyemkuna Fortingo1, Samuel Melnyk1,2, Sarah H Sutton3

  • 1Department of Physiology, Medical College of Georgia, Augusta University, Augusta, GA 30907, USA.

International Journal of Molecular Sciences
|December 11, 2022
PubMed
Summary

Acute inflammation aids corneal wound healing by clearing pathogens, but excessive or chronic inflammation, often triggered by toll-like receptors (TLRs), hinders recovery. Reducing severe inflammation improves corneal clarity and healing outcomes.

Keywords:
corneahealinginflammationinnate immune systemphosphatidylglyceroltoll-like receptorswound

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Area of Science:

  • Ophthalmology
  • Immunology
  • Wound Healing

Background:

  • Corneal wounds increase infection risk and pain.
  • Excessive inflammation can delay corneal healing, impacting clarity and thickness.
  • Acute inflammation is crucial for clearing pathogens and preventing infection.

Purpose of the Study:

  • To review the role of inflammation in corneal wound healing.
  • To differentiate the effects of acute versus chronic inflammation.
  • To identify pathways involved in inflammation-induced corneal damage.

Main Methods:

  • Literature review on inflammation and corneal wound healing.
  • Examination of the role of innate immune system activation.
  • Analysis of toll-like receptor (TLR) pathways and their mediators.

Main Results:

  • Toll-like receptor (TLR) activation (TLR2, TLR4) by microbial or damage-associated molecular patterns (DAMPs) triggers pro-inflammatory nuclear factor kappa-light-chain-enhancer of activated B cells (NFκB) pathways.
  • Excessive inflammation, even in sterile keratitis, impairs corneal transparency and healing.
  • Reduced chronic or severe inflammation correlates with better corneal healing outcomes.

Conclusions:

  • A balance of inflammation is necessary for effective corneal wound healing.
  • Minimizing excessive and chronic inflammation is key to improving corneal clarity, thickness, and overall healing.
  • Targeting inflammatory pathways may offer therapeutic strategies for corneal wound management.