Hypochlorous-Acid-Generating Electrochemical Scaffold for Treatment of Wound Biofilms.
Mia Mae KiamcoHannah M ZmudaAbdelrhman MohamedDouglas R CallYash S RavalRobin PatelHaluk BeyenalPublished in: Scientific reports (2019)
Biofilm formation causes prolonged wound infections due to the dense biofilm structure, differential gene regulation to combat stress, and production of extracellular polymeric substances. Acinetobacter baumannii, Staphylococcus aureus, and Pseudomonas aeruginosa are three difficult-to-treat biofilm-forming bacteria frequently found in wound infections. This work describes a novel wound dressing in the form of an electrochemical scaffold (e-scaffold) that generates controlled, low concentrations of hypochlorous acid (HOCl) suitable for killing biofilm communities without substantially damaging host tissue. Production of HOCl near the e-scaffold surface was verified by measuring its concentration using needle-type microelectrodes. E-scaffolds producing 17, 10 and 7 mM HOCl completely eradicated S. aureus, A. baumannii, and P. aeruginosa biofilms after 3 hours, 2 hours, and 1 hour, respectively. Cytotoxicity and histopathological assessment showed no discernible harm to host tissues when e-scaffolds were applied to explant biofilms. The described strategy may provide a novel antibiotic-free strategy for treating persistent biofilm-associated infections, such as wound infections.
Keyphrases
- pseudomonas aeruginosa
- biofilm formation
- candida albicans
- acinetobacter baumannii
- tissue engineering
- staphylococcus aureus
- cystic fibrosis
- wound healing
- surgical site infection
- gold nanoparticles
- blood pressure
- drug resistant
- drug delivery
- multidrug resistant
- methicillin resistant staphylococcus aureus
- living cells
- drinking water
- mass spectrometry
- drug release
- replacement therapy