Hydrogel-Based Platforms Offer Integrated Strategies for Antimicrobial Delivery and Biofilm Management in Chronic Wound Care

Chronic wounds, affecting millions globally, represent a significant healthcare burden, often failing to progress through normal healing phases within three months. A pervasive challenge across all etiologies is the presence of microbial biofilms, identified in up to 78% of chronic wound samples. These biofilms shield bacteria, rendering them up to 1000-fold more resistant to conventional antibiotics than planktonic forms, leading to persistent infection, inflammation, and delayed tissue repair. Current standard-of-care dressings often lack the advanced capabilities needed to effectively penetrate or disrupt these complex microbial structures while simultaneously delivering therapeutic agents.

This comprehensive review systematically examines the latest advancements in hydrogel-based platforms designed for chronic wound care, with a specific focus on their integrated strategies for antimicrobial delivery and biofilm management. The authors synthesized findings from diverse research, including in vitro studies and preclinical-animal models, to evaluate how various hydrogel formulations address the multifaceted challenges of non-healing wounds. The review explores the design principles, material properties, and functional attributes of these advanced dressings, highlighting innovations in controlled release mechanisms, stimuli-responsive systems, and combination therapies aimed at enhancing therapeutic efficacy against resistant pathogens.

Hydrogel-based platforms demonstrate significant promise by offering tunable properties crucial for effective wound management. They can be engineered for sustained and localized release of a wide array of antimicrobial agents, including antibiotics, antiseptics, and natural compounds, directly at the wound site, thereby minimizing systemic toxicity and improving therapeutic concentrations. The physical properties of hydrogels, such as their high water content and biocompatibility, create a moist wound environment conducive to healing while also serving as a protective barrier against external contaminants. Importantly, advanced hydrogels are shown to actively combat biofilm formation and disrupt established biofilms through various mechanisms, including the incorporation of biofilm-dispersing enzymes, chelating agents, or nanoparticles. This integrated approach allows for both prophylaxis against new infections and the eradication of existing microbial communities. Furthermore, the review highlights the potential for 'smart' hydrogels that respond to specific wound microenvironment cues, such as pH changes or enzymatic activity, to trigger on-demand drug release. These innovations represent a substantial leap beyond traditional dressings.

The ability of hydrogels to simultaneously provide a healing-conducive environment, deliver antimicrobials, and actively manage biofilms positions them as a cornerstone for future chronic wound therapies.