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Related Concept Videos

Healing II: Complications01:24

Healing II: Complications

Complications during healing arise when tissue repair is altered by local or systemic factors. These changes involve abnormal collagen deposition, altered biomechanics, and reduced vascular supply, impairing restoration of normal structure and function.Loss of FunctionScar tissue differs significantly from the original tissue it replaces. In the skin, fibrosis lacks adnexal structures such as hair follicles, sebaceous glands, and sweat glands. Their absence reduces tactile sensitivity, impairs...
Clinical Applications of Epidermal Stem Cells01:19

Clinical Applications of Epidermal Stem Cells

Epidermal stem cells (EpiSCs) are mainly located at the basal layer of the epidermis. These cells repair minor injuries of the skin and replace dead skin cells. However, EpiSCs’ cannot heal severe wounds such as major burns or those from diabetes or hereditary disorders. In such cases, culturing the epidermal stem cells from the patient is possible and has yielded successful treatment options, such as laboratory-grown skin grafts. These grafts are synthesized using a patient’s own EpiSCs...
Phases of Wound Repair01:28

Phases of Wound Repair

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
In case of deep injuries, trauma to blood vessels results in blood loss. In the meantime, phospholipids released from the ruptured endothelial cellular membrane are converted into arachidonic...
Overview of Regeneration and Repair01:19

Overview of Regeneration and Repair

Regeneration and repair processes are critical in healing damages caused by injury, disease, and aging. In regeneration, the damaged tissue is entirely replaced with new growth that restores the original architecture and function. In contrast, tissue repair usually results in a fixed tissue architecture involving scar formation. Scars generally do not reestablish tissue function and may also exhibit structural abnormalities at the injury site.
Regeneration
All animals have varying degrees of...
Cell-matrix's Response to Mechanical Forces01:13

Cell-matrix's Response to Mechanical Forces

In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue. 
Anchoring junctions mechanically attach a cell to the...
Sutures of the Skull01:22

Sutures of the Skull

The human skull is composed of several bones that come together to protect the brain and support the structures of the face. The junctions where these bones meet are called sutures.
Sutures are immobile joints between adjacent bones of the skull. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. The long sutures located between the skull bones are not straight but instead follow irregular, tightly twisting paths. These twisting lines tightly...

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A Mouse Model of Mechanotransduction-driven, Human-like Hypertrophic Scarring
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Scar and contracture: biological principles.

Peter Kwan1, Keijiro Hori, Jie Ding

  • 1Division of Plastic and Reconstructive Surgery, Department of Surgery, 2D2.28 WMC, University of Alberta, 8440-112 Street, Edmonton, AB T6G 2B7, Canada.

Hand Clinics
|October 6, 2009
PubMed
Summary
This summary is machine-generated.

Abnormal scarring after hand burns results from dysregulated wound healing and fibrosis. Understanding scar biology offers new research avenues to improve patient outcomes and functional results.

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A Mouse Model of Mechanotransduction-driven, Human-like Hypertrophic Scarring
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08:20

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Published on: May 1, 2020

Area of Science:

  • Biomedical Engineering
  • Wound Healing Research
  • Plastic Surgery

Background:

  • Dysregulated wound healing and pathologic fibrosis are primary causes of abnormal scarring in hand burn injuries.
  • Poor scarring leads to significant functional and aesthetic impairments, negatively impacting patient quality of life.

Purpose of the Study:

  • To review the biologic mechanisms underlying scar formation and contracture in hand burns.
  • To explore potential therapeutic targets for improving scar quality and patient outcomes.

Main Methods:

  • Literature review focusing on the biology of scar and contracture.
  • Analysis of factors contributing to abnormal wound healing, including injury depth, cytokines, cellular components, immune responses, and extracellular matrix dynamics.
  • Exploration of therapeutic strategies targeting these biologic pathways.

Main Results:

  • Abnormal scarring is multifactorial, influenced by injury characteristics and the complex interplay of cellular and molecular mediators.
  • Key factors include the depth of burn injury, specific cytokines, cellular infiltration (e.g., fibroblasts, immune cells), immune system modulation, and extracellular matrix remodeling.
  • Current and emerging therapeutic measures aim to modulate these specific biologic pathways to mitigate fibrosis and improve scar quality.

Conclusions:

  • A comprehensive understanding of scar biology is crucial for developing effective treatments for hand burn scars.
  • Targeting specific biologic mechanisms offers promising avenues for future research and clinical interventions to enhance functional and aesthetic recovery.
  • Further investigation into the identified factors can lead to innovative therapies for preventing and treating pathologic scarring.