Multifunctional poloxamer-based thermo-responsive hydrogel loaded with human lactoferricin niosomes: In vitro study...

Chronic wound infections are attributed to delayed tissue repair, which remains a major clinical challenge in long-term health care. Particularly, infections with antibiotic resistance have more serious effects on health, often resulting in unsuccessful treatments. Thus, antimicrobial peptide (AMP)-based therapy holds promise as a potential therapeutic approach to overcoming drug resistance. Conventional wound dressing is a passive strategy for wound care that is not capable of eradicating pathogens and promoting tissue repair. In this study, we aim to construct an advanced wound dressing; a thermo-responsive hydrogel incorporated with lactoferricin (Lfcin) niosome (Lfcin-Nio/hydrogel) for bacterial pathogen treatment. The Lfcin-loaded niosome (Lfcin-Nio) has a particle size of 396.91 ± 20.96 nm, 0.38 ± 0.01 of PdI, -10.5 ± 0.3 mV of ζ potential, and 72.30 ± 7.05 % Lfcin entrapment efficiency. Lfcin-Nio exhibited broad antibacterial activity on both drug-susceptible and drug-resistant strains, and also on bacteria residing in the biofilm matrix. The Lfcin-Nio/hydrogel was fabricated from 0.5 % w/v poloxamer 188-20 % w/v poloxamer 407, and supplemented with Lfcin-Nio and epidermal growth factor (EGF). The physical properties of Lfcin-Nio/hydrogels showed elasticity, swelling ability, and strong injectability with responsiveness to 33-37 °C temperatures. The biological properties of Lfcin-Nio/hydrogels exhibited a bactericidal effect against drug-resistant strains of S. aureus and P. aeruginosa, and showed less toxicity to the human skin fibroblast. It also promoted the healing of scratches by 55 % within 6 h, compared to the wound closure rate of 20 % in the cell control. The inflammatory response of the Lfcin-Nio/hydrogel-treated cells was reduced via suppression of IL-1β and COX-2 mRNA expressions. From this study, Lfcin-Nio/hydrogels can be suggested as a modern wound dressing that possesses multifunctional and beneficial properties for the management of chronic wound infections.