Methylglyoxal Alone or Combined with Light-Emitting Diodes/Complex Electromagnetic Fields Represent an Effective Response to Microbial Chronic Wound Infections.

Background: antimicrobial resistance represents a critical issue leading to delayed wound healing; hence, it is necessary to develop novel strategies to address this phenomenon. Objectives: this study aimed to explore the antimicrobial/anti-virulence action of Methylglyoxal-MGO alone or combined with novel technologies such as Light-Emitting Diodes-LED and Complex Magnetic Fields-CMFs against resistant clinical strains isolated from chronic wounds. Methods: characterized planktonic Staphylococcus aureus, Pseudomonas aeruginosa, and Candida albicans isolates were used. Antimicrobial activity was evaluated by measuring optical density, Colony Forming Units-CFU, and synergy between MGO/LED or CMFs. Cellular membrane permeability by propidium iodide fluorescence and fluidity by Laurdan generalized polarization measurements were performed. P. aeruginosa motility was tested using the soft agar method. A docking study was performed to evaluate the possible interaction between MGO and urease in P. aeruginosa. Results: single/combined treatments showed significant antimicrobial activity. Major CFU reduction was detected after CMFs/MGO+CMFs application on C. albicans. Treatments exhibited significant changes in membrane permeability and fluidity. The treatments decreased P. aeruginosa motility with a major reduction after LED application. Docking analysis showed that MGO could bind with P. aeruginosa urease leading to defective folding and functional alterations. Conclusions: the results suggest that these treatments could represent promising and green therapeutic solutions against resistant isolates from chronic wounds.