Antibiotic-free combinational hyaluronic acid blend nanofibers for wound healing enhancement
Abstract
An innovative approach in the functionalization of nanofibers (NFs) for wound healing relies on non-antibiotic combinational therapy to subdue microbial invasion while reducing antimicrobial resistance and enhancing healing. Despite great potentials, wound healing efficacy of NFs embedding antimicrobial metal nanoparticles (NPs)/essential oils has been scarcely documented. We developed combinational NFs using an electrospinnable hyaluronic acid/polyvinyl alcohol/polyethylene oxide blend embedding a new ZnO NPs/cinnamon essential oil (CEO) antimicrobial combination. Fourier transform infrared, X-ray diffraction and transmission electron microscopy confirmed the presence of HA and distribution of ZnO NPs and CEO within NFs. Results for mean diameter, thermal stability, hydrophilicity, tensile strength, in vitro biodegradability, and cytocompatibility of crosslinked combinational NFs were intermediate between those of their singly loaded counterparts. All NFs inhibited the growth of Staphylococcus aureus (S. aureus). Compared with singly loaded NFs, combinational NFs showed the greatest healing efficacy of full thickness S. aureus inoculated incision wounds in rats in terms of bacterial inhibition following a single application, healing speed, and quality of skin structure recovery as verified by morphological, microbiological, and histopathological studies. Results highlighted the potentials of metal NPs/essential oil functionalization of nanofibrous wound dressings as an…
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