Tissue engineering for full-thickness burns: a dermal substitute from bench to bedside

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Developing effective dermal substitutes is crucial for treating full-thickness burns.
• Existing dermal substitutes often face challenges with availability and viability.

Purpose of the Study:

• To create a viable and accessible dermal substitute (DS) for definitive coverage of full-thickness burns.
• To evaluate a DS composed of a collagen-glycosaminoglycan-chitosan dermal matrix (DM) colonized with foreskin fibroblasts (FF).

Main Methods:

• A dermal matrix (DM) was colonized with foreskin fibroblasts (FF) and compared with adult dermal fibroblasts (DF).
• Expression of key proteins (fibrillin, tropoelastin, laminin-5, collagen VII) was analyzed.
• Production of wound healing mediators and vascular endothelial growth factor (VEGF) was assessed.
• Grafting of the DS into nude rats was performed to evaluate healing efficacy.

Main Results:

• FF-colonized DS showed higher expression of fibrillin and tropoelastin compared to DF-colonized DS.
• Both FF- and DF-colonized DS supported dermal-epidermal junction formation with laminin-5 and collagen VII.
• DS produced cutaneous wound healing mediators and VEGF in response to platelet lysate.
• Grafted DS in nude rats resulted in complete healing of dermal-epidermal lesions with good epidermalization.

Conclusions:

• A collagen-glycosaminoglycan-chitosan dermal matrix colonized with foreskin fibroblasts serves as a viable dermal substitute for burn coverage.
• This FF-colonized DS promotes effective wound healing and tissue regeneration.
• The developed DS offers a promising solution for definitive burn wound management.