Bioengineered smart trilayer skin tissue substitute for efficient deep wound healing

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Deep wound healing necessitates advanced skin substitutes for effective tissue regeneration.
• Current single or bilayer scaffolds often lack the necessary properties for full-thickness skin repair.
• Achieving scar-free skin regeneration remains a significant clinical challenge.

Purpose of the Study:

• To fabricate and characterize a novel trilayer scaffold for simultaneous regeneration of epidermis, dermis, and hypodermis.
• To evaluate the scaffold's potential for promoting scar-free skin healing in deep wounds.

Main Methods:

• Fabrication of a biodegradable trilayer scaffold using casting, electrospinning, and lyophilization techniques.
• Characterization of mechanical properties, porosity gradient, and microenvironments.
• In vitro co-culture model with keratinocytes and dermal fibroblasts.
• In vivo assessment of wound healing efficacy.

Main Results:

• The trilayer scaffold exhibited mechanical strength comparable to native skin layers.
• It successfully maintained a porosity gradient and provided suitable microenvironments for epidermal, dermal, and hypodermal regeneration.
• In vitro studies confirmed the scaffold's ability to support cell proliferation and differentiation into organized tissue.
• In vivo experiments demonstrated improved and expedited wound healing.

Conclusions:

• The engineered trilayer scaffold is a promising template for effective skin tissue regeneration in deep wounds.
• This advanced scaffold facilitates simultaneous regeneration of all skin layers, addressing limitations of current substitutes.
• The study highlights the potential for scar-free healing through tailored biomaterial design.