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Article Publish Status: FREE
Abstract Title:

Vitamin C Enhances the Antibacterial Activity of Honey against Planktonic and Biofilm-Embedded Bacteria.

Abstract Source:

Molecules. 2020 Feb 23 ;25(4). Epub 2020 Feb 23. PMID: 32102181

Abstract Author(s):

Juraj Majtan, Martin Sojka, Helena Palenikova, Marcela Bucekova, Viktor Majtan

Article Affiliation:

Juraj Majtan

Abstract:

Multifactorial antibacterial action is an important feature of honey; however, its bactericidal efficacy against biofilm-embedded bacteria is limited. The aim of this study was to investigate the impact of vitamin C (Vit C) on the antibacterial activity of natural honeys against planktonic as well as biofilm-embedded bacterial pathogens. The antibacterial activity of four honey samples supplemented with Vit C was expressed as the minimum inhibitory concentration (MIC). At sub-MICs, Vit C significantly increased the antibacterial activity of the tested honeys againstin planktonic cultures. However, after supplementation, honeydew honey, the most active honey, was ineffective against. On the other hand, when 100% honeydew honey was supplemented with Vit C (100 mg/g of honey) in a multispecies wound biofilm model, complete eradication of almost all bacterial isolates, including, was observed. Furthermore, a mixture of honey and Vit C was partially effective against, whereas honey alone exhibited no antibacterial activity against this bacterium. Vit C counteracted hydrogen peroxide in honey solution and, thus, eliminated the major antibacterial compound present in honey. It is likely that a combination of honey with Vit C may trigger the intracellular production of reactive oxygen species in bacterial cells, but the exact cellular mechanisms warrant further investigations.

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