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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...
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...
Skin Cancer01:30

Skin Cancer

Skin cancer is a type of cancer that occurs when there is an abnormal growth of skin cells, usually triggered by damage to the DNA within the skin cells. It is primarily caused by exposure to ultraviolet (UV) radiation from the sun or artificial sources like tanning beds. Skin cancer is the most common type of cancer worldwide, and its incidence continues to rise.
Basal Cell Carcinoma (BCC): BCC is the most common type of skin cancer, accounting for about 80% of cases. It typically develops in...
Renewal of Skin Epidermal Stem Cells01:12

Renewal of Skin Epidermal Stem Cells

The skin is divided into epidermis, dermis, and hypodermis, the skin's outermost, middle, and inner layers. The human epidermal layer regularly undergoes renewal, where old, dead cells are replaced by new cells. Epidermal stem cells or EpiSCs divide and differentiate to restore the lost cells. For the renewal process, some EpiSCs continuously self-renew. In contrast, few others differentiate into transit-amplifying cells, which later form prickle or spinous cells, followed by granular cells,...
Cell Migration01:19

Cell Migration

Cell migration is a process by which the cells move from one location to another, playing an essential role in embryological development, repair and regeneration, immune response, and metastasis. Cells migrate in response to chemical or mechanical signals generated by specific organs or tissues. The overall mechanism includes three steps - polarization, protrusion, and release. Polarization involves the formation of a distinct cell front and rear, which determines the direction of movement.

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Related Experiment Video

Updated: Jun 6, 2026

Visualizing Scar Development Using SCAD Assay - An Ex-situ Skin Scarring Assay
07:40

Visualizing Scar Development Using SCAD Assay - An Ex-situ Skin Scarring Assay

Published on: April 28, 2022

Current concepts in scar evolution and control.

Alan D Widgerow1

  • 1Plastic Surgery Department, University of Witwatersrand, Johannesburg, South Africa. awidgerow@gmail.com

Aesthetic Plastic Surgery
|December 8, 2010
PubMed
Summary
This summary is machine-generated.

Understanding scar formation at the molecular level has advanced, revealing complex cellular and extracellular matrix (ECM) crosstalk. This knowledge may allow for improved scar outcome interventions.

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Area of Science:

  • Biomedical Science
  • Molecular Biology
  • Dermatology

Background:

  • Scarring mechanisms were historically understood at a basic level.
  • Molecular events driving scar evolution were previously ill-defined.

Purpose of the Study:

  • To elucidate the molecular crosstalk in scar evolution.
  • To integrate established principles with current understanding of cellular and ECM interactions.
  • To identify potential interventions for improving scar outcomes.

Main Methods:

  • Review and synthesis of existing literature on scar biology.
  • Analysis of cellular signaling pathways within the cytosol and nucleus.
  • Examination of extracellular matrix (ECM) dynamics and interactions.

Main Results:

  • Identified a complex molecular crosstalk involving signals, protein activation, and receptor transactions.
  • Demonstrated "dynamic reciprocity" between cellular and ECM components during scar formation.
  • Highlighted key principles: mechanostimulation, hydration, inflammation control, and collagen remodeling.

Conclusions:

  • Integrating molecular insights with macroscopic principles enhances understanding of scar evolution.
  • Potential therapeutic strategies can be developed by modulating scar-related molecular crosstalk.
  • Targeting specific pathways offers a promising avenue for improved scar management.