Activity of a hypochlorous acid-producing electrochemical bandage as assessed with a porcine explant biofilm model |
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| Authors: | Gretchen Tibbits Abdelrhman Mohamed Suzanne Gelston Laure Flurin Yash S. Raval Kerryl E. Greenwood-Quaintance Robin Patel Haluk Beyenal |
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| Affiliation: | 1. The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington, USA;2. Divison of Clinical Microbiology, Mayo Clinic, Rochester, Minnesota, USA |
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| Abstract: | The activity of a hypochlorous acid-producing electrochemical bandage (e-bandage) in preventing methicillin-resistant Staphylococcus aureus infection (MRSA) infection and removing biofilms formed by MRSA was assessed using a porcine explant biofilm model. e-Bandages inhibited S. aureus infection (p = 0.029) after 12 h (h) of exposure and reduced 3-day biofilm viable cell counts after 6, 12, and 24 h exposures (p = 0.029). Needle-type microelectrodes were used to assess HOCl concentrations in explant tissue as a result of e-bandage treatment; toxicity associated with e-bandage treatment was evaluated. HOCl concentrations in infected and uninfected explant tissue varied between 30 and 80 µM, decreasing with increasing distance from the e-bandage. Eukaryotic cell viability was reduced by an average of 71% and 65% in fresh and day 3-old explants, respectively, when compared to explants exposed to nonpolarized e-bandages. HOCl e-bandages are a promising technology that can be further developed as an antibiotic-free treatment for wound biofilm infections. |
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| Keywords: | biofilms chronic wounds electrochemical bandage hypochlorous acid MRSA Staphylococcus aureus |
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