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Abstract Title:

Propolis AffectsGrowth, Biofilm Formation, eDNA Release and Phenazine Production: Potential Involvement of Polyphenols.

Abstract Source:

Microorganisms. 2020 Feb 12 ;8(2). Epub 2020 Feb 12. PMID: 32059431

Abstract Author(s):

Aida Meto, Bruna Colombari, Agron Meto, Giorgia Boaretto, Diego Pinetti, Lucia Marchetti, Stefania Benvenuti, Federica Pellati, Elisabetta Blasi

Article Affiliation:

Aida Meto

Abstract:

() is an opportunistic pathogen responsible for a wide range of clinical conditions, from mild infections to life-threatening nosocomial biofilm-associated diseases, which are particularly severe in susceptible individuals. The aim of thisstudy was to assess the effects of an Albanian propolis on several virulence-related factors of, such as growth ability, biofilm formation, extracellular DNA (eDNA) release and phenazine production. To this end, propolis was processed using three different solvents and the extracted polyphenolic compounds were identified by means of high performance liquid chromatography coupled to electrospray ionization mass spectrometry (HPLC-ESI-MS) analysis. As assessed by a bioluminescence-based assay, among the three propolis extracts, the ethanol (EtOH) extract was the most effective in inhibiting both microbial growth and biofilm formation, followed by propylene glycol (PG) and polyethylene glycol 400 (PEG 400) propolis extracts. Furthermore,exposure to propolis EtOH extract caused a decrease in eDNA release and phenazine production. Finally, caffeic acid phenethyl ester (CAPE) and quercetin decreased upon propolis EtOH extract exposure to bacteria. Overall, our data add new insights on the anti-microbial properties of a natural compound, such as propolis against. The potential implications of these findings will be discussed.

Study Type : In Vitro Study

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