A two-component pre-seeded dermal-epidermal scaffold

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Full-thickness skin defects pose significant clinical challenges requiring advanced regenerative solutions.
• Current treatments often face limitations in promoting complete skin regeneration and functional recovery.

Purpose of the Study:

• To develop and characterize a novel bilayered dermal-epidermal scaffold for treating full-thickness skin defects.
• To evaluate the scaffold's ability to support dermal fibroblast and epidermal keratinocyte proliferation and organization.

Main Methods:

• Fabrication of a bilayered scaffold with a dermal component (fibrin, cross-linked hyaluronic acid, cell adhesion peptide) and an epidermal component (cross-linked hyaluronic acid, poly-l-lysine).
• In situ gelation of the dermal component to conform to lesion shape, delivering human dermal fibroblasts.
• Culturing human keratinocytes on the epidermal membrane.
• Assessing cell attachment, proliferation, matrix formation, and scaffold integrity.

Main Results:

• The dermal component successfully delivered fibroblasts, which formed a three-dimensional matrix facilitated by tailored mechanical properties and cell-binding ligands.
• The epidermal component supported keratinocyte attachment and monolayer formation.
• Stable composite scaffold formation was achieved through amine-aldehyde bonding at the interface.
• Scaffold components provided cell-specific cues promoting proliferation and mimicking the native skin environment.

Conclusions:

• The developed bilayered scaffold effectively supports both dermal and epidermal cell growth and organization.
• This scaffold shows promise as a biomimetic construct for the treatment of full-thickness skin defects.
• Further investigation is warranted to assess in vivo efficacy and clinical translation.