Biodegradable Silk Fibroin Matrices for Wound Closure in a Human 3D Ex Vivo Approach

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Tissue Engineering

Background:

• Silk fibroin biomaterials are promising for wound healing applications.
• A human 3D ex vivo wound model derived from abdominoplasties was utilized.
• The study compared cast silk fibroin membranes and electrospun nonwoven matrices.

Purpose of the Study:

• To explore the potential of silk fibroin biomaterials for enhancing wound healing.
• To evaluate the integration and efficacy of silk fibroin in a human ex vivo wound model.
• To compare the performance of silk fibroin membranes and nonwoven matrices.

Main Methods:

• Histomorphometric and immune histochemical analyses (HE, Ki67, TUNEL) were performed.
• Keratinocyte behavior and wound healing were assessed over 20 days.
• Comparison was made between silk fibroin materials and untreated controls.

Main Results:

• Both silk fibroin membrane and nonwoven matrices promoted rapid keratinocyte proliferation and enhanced infiltration.
• Silk fibroin membranes showed significantly improved early regeneration compared to nonwoven matrices and controls (p < 0.05).
• Complete epidermal regeneration with multi-layered structures was observed, with no signs of increased apoptosis or degradation.

Conclusions:

• Silk fibroin biomaterials demonstrate excellent biocompatibility and potential for clinical wound care.
• The materials effectively support tissue integration and re-epithelialization, crucial for wound healing.
• The ex vivo wound model is a viable option for pre-clinical testing of wound healing strategies.