Collagen-based sponge hastens wound healing via decrease of inflammatory cytokines

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Wound Healing Research

Background:

• Open wounds pose significant challenges in healing and infection prevention.
• Effective wound dressings are crucial for promoting tissue repair and minimizing inflammation.
• Collagen is a key component in natural tissue regeneration, making it a promising material for wound care.

Purpose of the Study:

• To evaluate the efficacy of a novel collagen-based sponge as an open wound dressing.
• To compare its performance against a commercial collagen sponge in a preclinical wound model.
• To assess the impact on key healing indicators, including re-epithelialization, inflammation, and growth factor expression.

Main Methods:

• Induction of standardized skin incisions (10 mm diameter) in a rat model.
• Regular wound monitoring up to 12 days post-incision.
• Histopathological analysis and Masson's trichrome staining for tissue structure.
• Quantitative analysis of growth factors (VEGF, TGF-β1) and cytokines (IL-6, TNF-α, IL-10) at transcriptional and translational levels.

Main Results:

• The collagen-based sponge group exhibited accelerated re-epithelialization and reduced inflammatory cell infiltration.
• Masson's trichrome staining indicated well-organized, horizontal collagen fibril deposition in the collagen-based sponge group.
• Upregulation of vascular endothelial growth factor (VEGF) and transforming growth factor-beta 1 (TGF-β1) was observed.
• Significant downregulation of pro-inflammatory cytokines (IL-6, TNF-α) and upregulation of the anti-inflammatory cytokine IL-10 were noted.

Conclusions:

• The developed collagen-based sponge demonstrates superior wound healing properties compared to commercial options in an animal model.
• Its ability to modulate inflammatory responses and promote organized tissue regeneration highlights its potential.
• This novel biomaterial shows promise as an advanced therapeutic agent for open wound management.