Alginate-hyaluronan composite hydrogels accelerate wound healing process

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Tissue Engineering

Background:

• Dermal wound repair remains a significant clinical challenge.
• Polysaccharide-based hydrogels offer potential as advanced wound dressings.
• Alginate (ALG) and hyaluronan (HA) are biocompatible polymers with therapeutic potential.

Purpose of the Study:

• To develop and characterize alginate-hyaluronan (ALG/HA) hydrogels as biofunctional platforms for dermal wound repair.
• To evaluate the effect of HA on ALG hydrogel properties and gelation kinetics.
• To assess the in vitro and in vivo efficacy of ALG/HA hydrogels in promoting wound healing.

Main Methods:

• Hydrogels were synthesized using internal gelation of ALG/HA mixtures.
• Rheological analysis was performed to study gelation kinetics.
• In vitro studies involved adipose derived multipotent adult stem cells (Ad-MSC) and HaCaT cells using scratch assays.
• In vivo studies utilized a rat model of excised wound.

Main Results:

• ALG/HA hydrogels exhibited homogeneous and easy-to-handle properties.
• Hyaluronan incorporation slowed gelation kinetics but minimally affected final cross-link density.
• ALG/HA hydrogels significantly promoted cell migration (gap closure) in vitro compared to ALG alone.
• In vivo studies demonstrated significantly accelerated wound closure with ALG/HA hydrogels in a rat model.

Conclusions:

• ALG/HA hydrogels represent a versatile and effective biofunctional platform for dermal wound repair.
• The integration of HA into ALG hydrogels enhances their wound healing capabilities.
• These findings suggest a promising, clinically translatable strategy for improving wound healing outcomes.