Antimicrobial activity of nitrochalcone and pentyl caffeate against hospital pathogens results in decreased microbial adhesion and biofilm formation
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Data
2019-04-03
Autores
Almeida Sayao de Emeri, Fernanda Teresinha de
Rosalen, Pedro Luiz
Paganini, Eder Ramos [UNESP]
Rocha Garcia, Mayara Aparecida [UNESP]
Nazare, Ana Carolina [UNESP]
Lazarini, Josy Goldoni
Alencar, Severino Matias de
Regasini, Luis Octavio [UNESP]
Orlandi Sardi, Janaina de Cassia
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Editor
Taylor & Francis Ltd
Resumo
The present study investigated the antimicrobial, anti-adhesion and anti-biofilm activity of the modified synthetic molecules nitrochalcone (NC-E05) and pentyl caffeate (C5) against microorganisms which have a high incidence in hospital-acquired infections. The compounds were further tested for their preliminary systemic toxicity in vivo. NC-E05 and C5 showed antimicrobial activity, with minimum inhibitory concentrations (MICs) ranging between 15.62 and 31.25g ml(-1). Treatment with NC-E05 and C5 at 1xMIC and/or 10xMIC significantly reduced mono or mixed-species biofilm formation and viability. At MIC/2, the compounds decreased microbial adhesion to HaCaT keratinocytes from 1 to 3h (p<0.0001). In addition, NC-E05 and C5 demonstrated low toxicity in vivo in the Galleria mellonella model at anti-biofilm concentrations. Thus, the chemical modification of these molecules proved to be effective in the proposed anti-biofilm activity, opening opportunities for the development of new antimicrobials.
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Mixed biofilm, nitrochalcone, pentyl caffeate, Staphylococcus aureus, Candida albicans
Como citar
Biofouling. Abingdon: Taylor & Francis Ltd, v. 35, n. 2, p. 129-142, 2019.