Fuente: Journal of applied polymer Lugar: RESEARCH ARTICLE This study explores a dual crosslinked PVA/gelatin hydrogel infused with Tecoma stans alcoholic extract, rich in bioactive phytocompounds. The hydrogel dressing exhibits good antibacterial activity, enhancing cell proliferation along with improved cell migration, making it a promising candidate for skin tissue regeneration through the synergistic action of plant-derived compounds with a biocompatible hydrogel matrix.

ABSTRACT
Plant-derived medicine has been used for skin regeneration and chronic wound healing due to its multifunctional bioactive compounds. This study reports a dual-crosslinked polyvinyl alcohol (PVA)/gelatin (P/G) hydrogel system incorporated with Tecoma stans leaf extracts, which is rich in phenolic compounds, inositol derivatives, and other secondary metabolites for wound healing. Here, we have prepared two different alcoholic (methanolic and ethanolic) crude extracts and loaded both (2 mg/mL) separately with different ratios of PVA(P) and gelatin (G) hydrogel. The TSLME and TSLEE-loaded P/G hydrogel were stabilized by tannic acid and three consecutive freeze–thaw cycles. GC–MS analysis identified key phytoconstituents, including catechol, vanillic acid, hydroquinone, and myo-inositol, which help in wound healing due to their antioxidant, antimicrobial, and cell proliferation effects. Comprehensive characterization, including FTIR, FESEM, XRD, and viscosity analysis, has confirmed the structural integrity, porosity, and viscoelastic behavior. In vitro antimicrobial activity has shown significant inhibition against both Escherichia coli and Staphylococcus aureus pathogens. Furthermore, in vitro cytocompatibility and scratch assay utilizing fibroblast cell lines revealed enhanced cell viability along with migration and cell proliferation, indicating that the developed hydrogel is a potential candidate for wound healing. This study highlights the synergistic effects of T. Stans phytocompounds integration in hydrogel dressing for chronic wound healing.