Wound healing is a complex process involving various cellular and molecular mechanisms. It is crucial for restoring tissue integrity and preventing infections. Over the years, researchers have explored various approaches to improve the wound healing process, including the use of biomaterials from natural sources. One such biomaterial is fish collagen, which has attracted attention because of its structure and its behaviour in laboratory models of wound healing and tissue repair.
Fish Collagen: What It Is and Where It Comes From
What is Fish Collagen?
Fish collagen, also known as marine collagen, is a structural protein extracted from the skin, scales, or bones of fish. It plays a crucial role in the extracellular matrix of various tissues such as skin, tendons, and bones, providing them with strength and elasticity. Thanks to its good bioavailability and its structure, fish collagen is increasingly being studied as a biomaterial in wound-care research. That research works with collagen applied to the wound, not with collagen taken by mouth.
Why is the Bioavailability of Fish Collagen So High?
Compared to collagen from mammals, fish collagen has a smaller molecular size. This allows for more efficient absorption by the body and faster utilization in target tissues. Fish collagen has a lower molecular weight than collagen from beef or pork and is correspondingly well absorbed.
The Role of Essential Amino Acids
Fish collagen is rich in glycine, proline, and hydroxyproline – amino acids that are essential for the stability of the collagen structure. They are the amino acids collagen itself is built from, and collagen peptides supply them as raw material.
Sustainability and Environmental Friendliness
Another advantage: The extraction of fish collagen utilizes parts of the fish that would otherwise be considered waste, such as skin and scales. This makes the process not only sustainable but also reduces the ecological footprint compared to other animal collagen sources.
Mechanisms of Action
Marine collagen has been studied as a wound-care material along several lines. Research has examined:
1. Promotion of Cell Proliferation and Migration
Laboratory studies have examined how fish collagen behaves with fibroblasts, keratinocytes and endothelial cells – cell types involved in the wound healing process. These cells build the structural proteins of tissue, and collagen peptides supply the amino acids they use as raw material.
2. Modulation of Inflammatory Response
Inflammation is a crucial stage in the wound healing process as it helps remove debris and pathogens from the wound site. However, excessive or prolonged inflammation can impede the healing process. In cell and animal experiments, markers of the inflammatory response were recorded after collagen material was applied directly to the wound. These measurements come from preclinical models and say nothing about taking collagen powder.
3. Stimulation of Collagen Synthesis
Collagen synthesis is a crucial step in wound healing as it provides the structural framework for tissue regeneration. Fibroblasts are the cells that build collagen, and collagen peptides supply the amino acids they use as raw material. In these preclinical models, collagen fibre deposition and tissue tensile strength were the measured variables.
4. Antimicrobial Activity
Infections are a common complication in wounds and can significantly delay the healing process. In laboratory testing, marine collagen has been examined against various bacterial strains, including both gram-positive and gram-negative ones. These observations come from cell-culture and material experiments and do not transfer to collagen taken by mouth.
Research Evidence: What Has Been Measured
A number of scientific studies have examined fish collagen in the context of wound healing and tissue regeneration. In these in-vitro and in-vivo models, wound closure, scar formation and tissue structure were the variables recorded.
In-vitro Studies: Promotion of Cell Proliferation and Migration
In an in-vitro study, the effect of fish collagen on the proliferation and migration of fibroblasts was investigated. The results showed that marine collagen significantly increased cell proliferation and migration compared to control groups. This was measured in cell culture, with the collagen in direct contact with the cells.
In-vivo Studies: Accelerated Wound Healing in Animal Models
In an animal study, the effect of fish collagen on wound healing in rats was investigated. The group treated with fish collagen showed accelerated wound closure, increased collagen deposition, and improved tissue tensile strength compared to the control group.
Mechanisms of Wound Healing Through Fish Collagen
Fish collagen supports wound healing through several mechanisms:
- Cell proliferation and migration: recorded as measured variables in cell models.
- Modulation of inflammatory response: Cytokine levels were recorded as a measured variable in cell models.
- Collagen synthesis: fibroblast collagen output was the measured variable in these models.
- Antimicrobial activity: bacterial growth was measured in cell-culture and material tests.
Commercial Applications of Fish Collagen in Wound Healing
Fish collagen is used not only in research but also in practice as a biomaterial for wound dressings. Various companies process fish collagen into medical devices applied in clinical settings; these are not food supplements.
Kerecis Omega3 Wound: Innovation from Fish Skin
The Icelandic company Kerecis has developed "Omega3 Wound," a product derived from Atlantic cod skin. Through a special process, the fish skin is decellularized, creating a natural matrix rich in omega-3 fatty acids that supports wound healing.
Clinical Studies Demonstrate Efficacy
In a multicenter study, 25 complicated wounds in 23 patients were treated with the Omega3 Wound matrix. The results showed significant improvement in wound healing, including accelerated wound closure and reduced pain sensation. Healing times varied between 9 and 41 weeks, depending on the complexity of the wounds.
Another study, published in the New England Journal of Medicine Evidence, investigated the efficacy of fish skin grafts in diabetic foot ulcers. The results showed that 44% of wounds treated with fish skin were completely healed after 16 weeks, compared to 26.4% in the standard treatment group.
Applications and Availability
Kerecis products are used worldwide in the treatment of chronic wounds, burns, and other tissue damage. Through the natural properties of fish skin, they offer a biocompatible and effective alternative to conventional wound dressings.
Future Research
Although marine collagen has shown great potential for wound healing and tissue repair, further research is required to fully understand its mechanisms of action and optimize its therapeutic applications. Future studies should focus on identifying the specific bioactive components of fish collagen responsible for its wound healing effects, as well as optimizing its formulation and delivery methods.
Furthermore, additional clinical studies are needed to evaluate the efficacy and safety of fish collagen-based products in humans. Long-term follow-up studies are required to assess the durability of healing outcomes and potential side effects.
Conclusion
Fish collagen is a promising biomaterial for wound healing and tissue repair. Laboratory work on it has looked at biocompatibility, cell proliferation and migration, markers of the inflammatory response and bacterial growth. Those measurements come from cell and animal models and describe a material applied to the wound.
Further research and clinical studies are required to fully exploit the potential of marine collagen and translate it into practical applications. With continued advances in the field of biomaterials and tissue engineering, fish collagen-based products have the potential to complement wound care and improve outcomes for patients with acute and chronic wounds.
Image credits: Diana Polekhina, FlyD, UX Indonesia, CDC on Unsplash
Sources
https://grainofsound.org/fischkollagen-das-anti-aging-protein-mit-der-besten-bioverf%C3%BCgbarkeit/
https://kollageninstitut.de/blogs/blog/wundheilung-beschleunigen-mit-kollagen
https://www.pharmazeutische-zeitung.de/fischhaut-gegen-chronische-wunden-131992