Hydrogel Crosslinking Modulates Macrophages, Fibroblasts, And Their Communication During Wound Healing

August 2024 in “ Nature Communications ”

Sergei Butenko, Raji R. Nagalla, Christian F. Guerrero‐Juarez, Francesco Palomba, Laure David, Richard Nguyen, Denise Gay, Axel A. Almet, Michelle A. Digman, Suoqin Jin, Philip O. Scumpia, Maksim V. Plikus, Wendy F. Liu

GelMA hydrogels macrophages fibroblasts wound healing inflammation scar sizes fibrosis tissue repair hydrogel properties wound dressings hydrogels

Studysummary This study found that in female mice, softer, lightly crosslinked gelatin-based hydrogels promoted better wound healing with less scarring and inflammation compared to stiffer, heavily crosslinked hydrogels, affecting immune and stromal cell behavior. Our plain-language summary of this paper — not a Tressless recommendation.

The study investigates how varying the crosslinking density of GelMA hydrogels affects wound healing in murine skin wounds by modulating macrophage and fibroblast behavior. Lightly crosslinked GelMA (lo-GelMA) promotes better cellular integration, reduced inflammation, and smaller scar sizes, while highly crosslinked GelMA (hi-GelMA) induces stronger inflammatory responses and larger scars. The findings suggest that softer, more porous hydrogels (lo-GelMA) are more beneficial for wound healing by reducing fibrosis and promoting tissue repair, highlighting the importance of hydrogel properties in designing effective wound dressings.

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