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To accelerate serious skin burn wound healing in a convenient manner, an interpenetrating network of hydrogel consisting of gellan gum and polyacrylamide was synthesized by chemical crosslinking and Mg 2+  ion immersion techniques. The prepared Mg 2+ @PAM/GG hydrogel was characterized by morphology, water vapor loss, swelling ratio, rheological properties, tensile mechanical, biocompatibility, and flow cytometry study. The results show that Mg 2+ @PAM/GG hydrogel’s mechanical strength could be enhanced by the dual network structure and physical crosslinking agent Mg 2+  ions. In addition, the tension strength of Mg 2+ @PAM/GG hydrogel is obviously increased from 86 to 392 kPa, the elongation at break increased from 84 to 231%, and crosslinking density N increased from 4.3 to 7.2 mol/m 3  compared with pure GG hydrogel. The cumulative release curve of Mg 2+  ions shows that the multiple release mechanism of Mg 2+  ions belong to non-Fick’s diffusion. Meanwhile,  in vitro  experiments show that Mg 2+ @PAM/GG double network hydrogel has favorable proliferation and an NF-κB pathway inhibition property for fibroblast cells. Finally, the healing effect of the Mg 2+ @PAM/GG was evaluated in a rat full-thickness burn model. The animal study demonstrates that Mg 2+ @PAM/GG could accelerate the healing efficiency in case of the sustained-released Mg 2+  ions in wound beds. Considering this excellent performance, this convenient prepared hydrogel has great potential as a commercial application for skin full-thickness burn healing materials.

The Fabrication of a Gellan Gum-Based Hydrogel Loaded With Magnesium Ions for the Synergistic Promotion of Skin Wound Healing