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Related Concept Videos

Clinical Applications of Epidermal Stem Cells01:19

Clinical Applications of Epidermal Stem Cells

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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...
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Phases of Wound Repair01:28

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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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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...
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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.
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Related Experiment Video

Updated: Jul 4, 2025

Generation of a Three-dimensional Full Thickness Skin Equivalent and Automated Wounding
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Developing natural polymers for skin wound healing.

Han Zhang1, Xiang Lin1, Xinyue Cao1

  • 1Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China.

Bioactive Materials
|January 29, 2024
PubMed
Summary

Natural polymers offer sustainable, biocompatible solutions for biomedicine. This review details their preparation and application in skin wound repair, highlighting future prospects.

Keywords:
BiomaterialsBiomedical engineeringNatural polymersTissue engineeringWound healing

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Regenerative Medicine

Background:

  • Natural polymers are complex organic molecules from renewable sources, offering biocompatibility and environmental advantages.
  • They are increasingly investigated for biomedical applications, particularly as natural biomaterials with antibacterial and antioxidant properties.
  • Sustainable and eco-friendly materials are crucial for developing advanced medical products.

Purpose of the Study:

  • To provide a comprehensive overview of natural polymers in biomedicine over the last two decades.
  • To examine the composition and preparation methods of natural polymer-based biomaterials.
  • To summarize the application of natural polymer materials in skin wound repair stages.

Main Methods:

  • Literature review of prevalent natural polymers used in the biomedical domain.
  • Analysis of components and preparation techniques for natural polymer biomaterials.
  • Synthesis of findings on natural polymer applications in skin wound healing.

Main Results:

  • Natural polymers are significant in developing sustainable and eco-friendly biomedical goods.
  • Advancements in natural biomaterials show promising antibacterial and antioxidant characteristics.
  • The review details material preparation and their role across all skin wound repair phases.

Conclusions:

  • Natural polymers are versatile for biomedical applications, especially in skin wound repair.
  • Current limitations of natural polymers are identified, alongside future development prospects.
  • Further research into natural polymers will drive innovation in sustainable biomaterials.