Chemokine-Capturing Wound Contact Layer Rescues Dermal Healing

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Wound Healing Research

Background:

• Chronic wounds often suffer from excessive inflammation, hindering natural healing processes.
• Chemokine scavenging by poly(ethylene glycol)-glycosaminoglycan (starPEG-GAG) hydrogels shows promise for wound regeneration.

Purpose of the Study:

• To develop and evaluate a textile-starPEG-GAG composite wound contact layer (WCL) for managing chronic wound inflammation.
• To tailor the WCL's chemokine-binding properties by adjusting hydrogel charge densities.

Main Methods:

• Fabrication of a composite WCL using starPEG-GAG hydrogels with systematically varied charge densities.
• Testing the WCL in a large animal (porcine) model simulating human wound healing disorders.
• Analysis of inflammatory markers, growth factors, granulation tissue, angiogenesis, and collagen deposition.

Main Results:

• The starPEG-GAG hydrogel-based WCL effectively sequestered pro-inflammatory chemokines.
• Treatment reduced excessive inflammation without negatively impacting pro-regenerative growth factors.
• Significant improvements observed in granulation tissue formation, angiogenesis, and collagen fiber deposition.

Conclusions:

• The developed biomaterials technology offers a new anti-inflammatory therapeutic approach for chronic wounds.
• The tunable nature of starPEG-GAG hydrogels allows for precise control over the wound microenvironment.
• This WCL demonstrates potential for advancing chronic wound treatment toward clinical application.