Abstract:
:Oxidizing agents like hypochlorous acid (HOCl) have antimicrobial activity. We developed an integrated electrochemical scaffold or 'e-scaffold' that delivers a continuous low dose of HOCl aimed at targeting microbial biofilms without exceeding concentrations toxic to humans, as a prototype of a device being developed to treat wound infections in humans. In this work, we tested the device against 33 isolates of bacteria (including isolates with acquired antibiotic resistance) grown as in vitro biofilms, alongside 12 combinations of dual-species in vitro biofilms. Biofilms were grown on the bottoms of 12-well plates for 24 hours. An integrated e-scaffold was placed atop each biofilm and polarized at 1.5V for 1, 2 or 4 hours. HOCl was produced electrochemically by oxidizing chloride ions (Cl-) in solution to chlorine (Cl2); dissolved Cl2 spontaneously dissociates in water to produce HOCl. The cumulative concentration of HOCl produced at the working electrode in each well was estimated to be 7.89, 13.46, and 29.50 mM after 1, 2 and 4 hours of polarization, respectively. Four hours of polarization caused an average reduction of 6.13 log10 CFU/cm2 (±1.99 log10 CFU/cm2) of viable cell counts of mono-species biofilms and 5.53 log10 CFU/cm2 (±2.31 log10 CFU/cm2) for the 12 dual-species biofilms studied. The described integrated e-scaffold reduces viable bacterial cell counts in biofilms formed by an array of antibiotic-susceptible and -resistant bacteria alone and in combination.
journal_name
Antimicrob Agents Chemotherjournal_title
Antimicrobial agents and chemotherapyauthors
Flurin L,Raval YS,Mohamed A,Greenwood-Quaintance KE,Cano EJ,Beyenal H,Patel Rdoi
10.1128/AAC.02007-20subject
Has Abstractpub_date
2021-01-04 00:00:00eissn
0066-4804issn
1098-6596pii
AAC.02007-20pub_type
杂志文章abstract::The etiological treatment of Chagas disease remains neglected. The compounds available show several limitations, mainly during the chronic phase. Lychnopholide encapsulated in polymeric nanocapsules (LYC-NC) was efficacious in mice infected with Trypanosoma cruzi and treated by intravenous administration during the ac...
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