Janus asymmetric galactomannan-based hydrogel with programmable deformation for accelerating wound healing

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Polymer Chemistry

Background:

• Accelerated wound closure is critical for effective clinical treatment.
• Current wound dressings often lack multifunctional properties for optimal healing.
• Asymmetrical engineering of wound dressings offers potential for enhanced therapeutic outcomes.

Purpose of the Study:

• To fabricate a Janus hydrogel wound dressing with thermo-responsive and adhesive properties.
• To evaluate the hydrogel's mechanical, antibacterial, and wound healing capabilities.
• To demonstrate the potential of this novel dressing for sutureless wound repair.

Main Methods:

• Fabrication of a Janus hydrogel using isopropylacrylamide, polyacrylamide, zwitterionic monomers, and hyaluronic acid.
• Characterization of hydrogel properties including tensile stress, fracture strain, and tissue adhesiveness.
• In vitro assessment of antibacterial activity and in vivo evaluation of wound healing efficiency.

Main Results:

• The hydrogel exhibited high tensile stress (80 Kpa) and fracture strain (3000%).
• Demonstrated significant tissue adhesiveness (35 Kpa) and 99.9% bacterial reduction.
• In vivo studies showed 99% wound healing efficiency by day 14, with enhanced contraction and tissue formation.

Conclusions:

• The developed Janus hydrogel is a promising multifunctional wound dressing.
• Its thermo-responsive and adhesive characteristics promote accelerated and sutureless wound closure.
• The hydrogel effectively enhances wound healing by promoting tissue regeneration and collagen deposition.