1. Novel aqueous oil-in-water emulsions containing extracts of natural coniferous resins are strongly antimicrobial against enterobacteria, staphylococci and yeasts, as well as on bacterial biofilms.
- Author
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Haapakorva E, Holmbom T, and von Wright A
- Subjects
- Anti-Bacterial Agents chemistry, Anti-Bacterial Agents isolation & purification, Antifungal Agents chemistry, Antifungal Agents isolation & purification, Emulsions chemistry, Emulsions isolation & purification, Emulsions pharmacology, Enterobacteriaceae physiology, Microbial Sensitivity Tests, Rapeseed Oil chemistry, Resins, Plant chemistry, Resins, Plant isolation & purification, Staphylococcus physiology, Water analysis, Yeasts physiology, Anti-Bacterial Agents pharmacology, Antifungal Agents pharmacology, Biofilms drug effects, Enterobacteriaceae drug effects, Resins, Plant pharmacology, Staphylococcus drug effects, Tracheophyta chemistry, Yeasts drug effects
- Abstract
Aims: The aim of this study was to examine the antimicrobial properties of novel aqueous natural rapeseed oil/saline emulsions containing different soluble components of spruce resin., Methods and Results: The composition of aqueous resin emulsions was analysed by GC-MS and their antimicrobial properties were studied with challenge tests and with turbidometric assays. The emulsions were strongly antimicrobial against common Gram-positive and Gram-negative bacteria (including MRSA) as well as common yeasts. Furthermore, they inhibited the biofilm formation and eradicated the microbial biofilms on tested microbes. Characteristic for the emulsions was the presence of oxidized resin acids. Other main components present in emulsions, such as lignans and coumaric acids, were not antimicrobial, when tested separately., Conclusions: The results indicated that the oxidized resin acids were the antimicrobial components in the emulsions. Also, there appears to be a stoichiometric relationship between the number of resin acid molecules and the number microbe cells in the antimicrobial action., Significance and Impact of the Study: The fact that these solutions do not contain abietic acid, which is the main allergenic compound in resins, suggests that these solutions would be suitable, well-tolerated antimicrobials for various medical applications. The aqueous formulation will also allow the expansion of the use of these emulsions in from medical applications to the food preservatives and disinfectants., (© 2017 The Authors. Journal of Applied Microbiology published by John Wiley & Sons Ltd on behalf of the Society for Applied Microbiology.)
- Published
- 2018
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