Bioadhesive polydopamine-vitamin A derivative hydrogels reprogram the wound microenvironment for scarless wound healing and hair follicle regeneration

hair follicle formation, indicating true functional tissue restoration. Transcriptomic and immunofluorescence analyses further revealed downregulation of pro-fibrotic and inflammatory pathways alongside activation of regenerative signaling, including M2 macrophage polarization and suppression of the M1 phenotype in treated wounds. This study introduces an early vitamin A-based nanocomposite hydrogel with dual anti-scarring and regenerative functions, offering a promising strategy for advanced wound care.