Human single-donor composite skin substitutes based on collagen and polycaprolactone copolymer

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Current skin substitutes face challenges with biocompatibility and toxicity.
• Developing advanced composite materials is crucial for effective wound healing solutions.

Purpose of the Study:

• To develop and characterize an enhanced composite skin substitute using collagen and poly(epsilon-caprolactone).
• To evaluate the in vitro and in vivo performance of the bi-layered skin substitute for wound repair.

Main Methods:

• Fabrication of a collagen and poly(epsilon-caprolactone) biocomposite (1:20 ratio).
• Seeding of human keratinocytes and fibroblasts on the biocomposite to create a bi-layered structure with preserved cell signaling.
• In vitro characterization of epidermal and dermal differentiation.
• In vivo assessment of wound closure, epidermal regeneration, and dermal collagen deposition.

Main Results:

• The bi-layered skin substitute demonstrated differentiated epidermis and fibrous dermis in vitro.
• Reduced Keratinocyte Growth Factor production suggests a favorable microenvironment for epidermal homeostasis.
• In vivo studies showed rapid wound closure, epidermal differentiation, and significant dermal collagen deposition.

Conclusions:

• The developed collagen and poly(epsilon-caprolactone) composite skin substitute offers excellent biocompatibility and promotes effective wound healing.
• The biomaterial shows significant potential for pharmaceutical screening and clinical applications in regenerative medicine.