Smart hydrogel mimics skin repair to accelerate diabetic wound healing, suggests research

The hydrogel, referred to as PBP (polypyrrole/bacterial cellulose/platelet-rich plasma), is designed to address the key barriers to diabetic wound healing: persistent inflammation, bacterial infection, and poor tissue regeneration. BC provides a porous, biocompatible scaffold that mimics the extracellular matrix, while PRP—rich in growth factors like VEGF, EGF, and PDGF—supports cell proliferation and angiogenesis. PPy, a conductive polymer, not only enhances the hydrogel’s antibacterial properties through capacitive charging but also enables electrically triggered release of growth factors.

In laboratory tests, the charged PBP hydrogel demonstrated over 98% antibacterial efficacy against both E. coli and S. aureus, common pathogens in diabetic wounds. The hydrogel’s electrical stimulation capability further boosted its performance, promoting fibroblast and endothelial cell growth while modulating macrophage polarization from a pro-inflammatory (M1) to a pro-healing (M2) phenotype.

In a diabetic mouse model, wounds treated with the PBP hydrogel—especially when combined with electrical stimulation—showed significantly faster healing. By day 14, nearly complete wound closure was observed, with enhanced collagen deposition, vascularization, and epidermal regeneration. The hydrogel also maintained a moist microenvironment, absorbed exudate, and reduced inflammatory cytokines, all critical for optimal wound repair.

What sets this dressing apart is its ability to mimic the physiological phases of skin repair: inflammation control, tissue formation, and remodeling. Unlike conventional dressings that offer passive protection, the PBP hydrogel actively participates in the healing process. Its electroresponsive nature allows for on-demand drug release, making it a potential platform for personalized wound care.

The researchers emphasize the sustainability and scalability of their approach. BC is derived from bacterial fermentation using renewable feedstocks, PRP is obtained from autologous blood, and PPy is synthesized via low-energy chemical polymerization. While challenges remain in large-scale manufacturing, such as optimizing hydrogel morphology and production efficiency, the team suggests that technologies like pressurized gyration spinning could enable mass production.

This innovative dressing represents a major step forward in chronic wound management. By integrating bioinspired design with smart material functionality, the PBP hydrogel offers a promising, clinically translatable solution for diabetic wound healing. Future work will focus on refining the material’s mechanical properties, extending growth factor release duration, and validating its efficacy in larger animal models and human trials.

Reference: Hao Wang, Pengyu He, Guoliang Tang,Fuyu Qi, Xu Lu, Maoxu Zhang, Ruizhu Zheng, Xiaohong Li, Zhijun Shi, Yaopeng Zhang, Guang Yang, Smart hydrogel mimics skin repair to accelerate diabetic wound healing, Journal: Journal of Bioresources and Bioproducts, DOI 10.1016/j.jobab.2025.10.004