Journal
BIOFOULING
Volume 36, Issue 4, Pages 442-454Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/08927014.2020.1771317
Keywords
Metallodrugs; ruthenium; antimicrobial activity; synergistic effect; biofilm
Funding
- Fundacao Cearense de Apoio ao Desenvolvimento Cientifico e Tecnologico (FUNCAP)
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
- Central AnaliticaUFC/CT-INFRA/MCTI-SISNANO/Pro-Equipamentos CAPES
- CAPES
- CNPq [308383/2018-4, 403866/2016-2, 303355/2018-2, PRONEX PR2 0101-00030.01.00/15]
- CAPES [23038.008968/201287]
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The aim of this study was to investigate the antibacterial activity, antibiotic-associated synergy, and anti-biofilm activity of the ruthenium complex,cis-[RuCl2(dppb) (bqdi)](2+)(RuNN). RuNN exhibited antimicrobial activity against Gram-positive bacteria with minimum inhibitory concentration (MIC) values ranging from 15.6 to 62.5 mu g ml(-1)and minimum bactericidal concentration (MBC) values ranging from 62.5 to 125 mu g ml(-1). A synergistic effect againstStaphylococcusspp. was observed when RuNN was combined with ampicillin, and the range of associated fractional inhibitory concentration index (FICI) values was 0.187 to 0.312. A time-kill curve indicated the bactericidal activity of RuNN in the first 1-5 h. In general, RuNN inhibited biofilm formation and disrupted mature biofilms. Furthermore, RuNN altered the cellular morphology ofS. aureusbiofilms. Further, RuNN did not cause hemolysis of erythrocytes. The results of this study provide evidence that RuNN is a novel therapeutic candidate to treat bacterial infections caused byStaphylococcusbiofilms.
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