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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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Three main types of fibers are secreted by fibroblasts: collagen fibers, elastic fibers, and reticular fibers. Collagen fiber is made from fibrous protein subunits linked together to form a long, straight fiber. Collagen fibers, while flexible, have great tensile strength, resist stretching, and give ligaments and tendons their characteristic resilience and strength. These fibers hold connective tissues together, even during the body's movement.
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Fibril-associated collagens are a type of collagens present in the extracellular matrix with interrupted triple helices or FACIT (Fibril-associated collagens interrupted triple-helices). FACIT help connect and attach the collagen fibrils with each other as well as with other proteins of the extracellular matrix.
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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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An Improved Method for the Preparation of Type I Collagen From Skin
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Collagen from Marine Sources for Potential Application in Wound Treatment.

Eleonora Tassara1, Marco Giovine2, Marina Pozzolini3

  • 1Department of Earth, Environment and Life Sciences, University of Genoa, Genoa, Italy.

Progress in Molecular and Subcellular Biology
|February 24, 2026
PubMed
Summary

Marine collagen offers a sustainable alternative to terrestrial sources for regenerative medicine. Its diverse properties from various marine organisms show promise for advanced wound healing applications.

Keywords:
BiomaterialsExtracellular matrix (ECM)Marine biodiversityMarine collagenRegenerative medicineTriple helixWound healing

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Marine Biotechnology

Background:

  • Collagen, a key extracellular matrix protein, is vital for tissue regeneration.
  • Ethical and safety concerns associated with terrestrial collagen drive the search for alternatives.
  • Marine ecosystems provide a rich, sustainable source of diverse collagen types.

Purpose of the Study:

  • To explore marine-derived collagen applications in wound healing.
  • To compare marine collagen's biochemical and structural traits with terrestrial collagen.
  • To review innovative uses of marine collagen in biomaterials for skin repair.

Main Methods:

  • Literature review of marine collagen sources and properties.
  • Analysis of collagen diversity across marine phyla (vertebrates and invertebrates).
  • Examination of marine collagen applications in scaffolds, films, and peptides.

Main Results:

  • Marine collagen exhibits significant diversity in structure and properties.
  • Fish collagen, while abundant, may have lower thermal stability.
  • Certain invertebrate collagens (e.g., sponges, mollusks) display unique mechanical and thermal characteristics.
  • Marine collagen and gelatin are utilized in innovative biomaterials for wound repair.

Conclusions:

  • Marine collagen is a promising, sustainable biomaterial for regenerative medicine and wound healing.
  • Marine biodiversity offers untapped potential for novel biomaterial development.
  • Further research into marine collagen can lead to more efficient and eco-friendly therapeutic solutions.