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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.
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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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Related Experiment Video

Updated: Sep 9, 2025

Stab-Wound Mouse Model for Studying Hemorrhage and Inflammation in Traumatic Brain Injury
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Traumatic Brain Injury Induces Early Barrier Protective Responses in Incisional Skin Wounds Accelerating Cutaneous

Mahyar Aghapour1, Florian Olde Heuvel2, Albrecht Fröhlich2

  • 1Department of Dermatology and Allergic Diseases, Ulm University, Ulm, Germany.

Wound Repair and Regeneration : Official Publication of the Wound Healing Society [And] the European Tissue Repair Society
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PubMed
Summary

Traumatic brain injury (TBI) accelerates skin wound healing by enhancing immune cell activity and promoting faster barrier formation. This robust response helps counteract potential systemic infections following combined injuries.

Keywords:
skin barrierstraumatic brain injurywound healinginnate and adaptive immunity

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Area of Science:

  • * Immunology and Regenerative Medicine
  • * Trauma and Injury Research

Background:

  • * Traumatic Brain Injury (TBI) and skin trauma frequently co-occur.
  • * The impact of TBI on the biological processes of skin wound healing remains largely uncharacterized.

Purpose of the Study:

  • * To investigate whether TBI influences the sequence and mechanisms of skin wound healing.
  • * To elucidate the molecular and cellular changes in skin wounds following combined TBI and incisional trauma.

Main Methods:

  • * Unbiased transcriptome analysis of incisional skin wounds in mice subjected to TBI.
  • * Immunostaining to assess cellular infiltration and tissue regeneration.
  • * Comparative analysis between wounds with and without concurrent TBI.

Main Results:

  • * TBI significantly enriched genes related to macrophage and T cell recruitment and activation at day 1 post-injury.
  • * At day 7, enhanced pathways included re-epithelialization, cornification, keratinization, and anti-inflammatory responses.
  • * Increased dermal myofibroblasts were observed, correlating with accelerated wound closure.

Conclusions:

  • * TBI initiates a robust defense response in skin wounds, characterized by early immune activation.
  • * Faster epidermal barrier formation and myofibroblast-mediated wound closure are key TBI-induced effects.
  • * These combined mechanisms may enhance host defense against systemic infection after combined trauma.