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Abstract Title:

Antibiofilm activity of bioactive hop compounds humulone, lupulone and xanthohumol toward susceptible and resistant staphylococci.

Abstract Source:

Res Microbiol. 2018 Jan 30. Epub 2018 Jan 30. PMID: 29407045

Abstract Author(s):

Katerina Bogdanova, Magdalena Röderova, Milan Kolar, Katerina Langova, Martin Dusek, Petr Jost, Klara Kubelkova, Pavel Bostik, Jana Olsovska

Article Affiliation:

Katerina Bogdanova

Abstract:

Bacterial biofilms pose a serious medical problem due to their significant resistance to antimicrobials, and staphylococci are recognized as the most frequent cause of biofilm-associated infections. The hop plant (Humulus lupulus L.) contains substances that have been determined to act as anti-infective agents against bacteria, mainly in planktonic form. Therefore, we decided to investigate the antibiofilm properties of Humulus lupulus L.-derived compounds (humulone, lupulone and xanthohumol) against a selected group of Staphylococcus spp., including methicillin-susceptible and resistant strains. All tested hop compounds were shown to possess antimicrobial properties against all tested staphylococci, both planktonic and biofilm-dwelling, with no significant difference between resistant and susceptible strains. All compounds lowered the number of bacterial cells released from the biofilm, with the strongest effect seen for lupulone, followed by xanthohumol. Moreover, lupulone and xanthohumol were not only able to penetrate the biofilm and reduce the number of bacteria within it, but their higher concentrations (∼60 μg/mL for xanthohumol and ∼125 μg/mL for lupulone) reduced the number of surviving bacterial cells to zero.

Study Type : In Vitro Study

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