Repurposing Sitafloxacin, Prulifloxacin, Tosufloxacin, and Sisomicin as Antimicrobials Against Biofilm and Persister Cells of Pseudomonas aeruginosa

Pseudomonas aeruginosa is a ubiquitous bacterium found in hospitals and the surrounding environment. The ability of P. aeruginosa to form biofilms confers high-level resistance to antibiotics, and the persister cells formed in the presence of high antibacterial drug concentrations make P. aeruginosa...

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Veröffentlicht in:Current microbiology 2022-01, Vol.79 (1), p.12-12, Article 12
Hauptverfasser: She, Pengfei, Li, Shijia, Liu, Yaqian, Xu, Lanlan, Zhou, Linying, Zeng, Xianghai, Li, Yimin, Liu, Shasha, Li, Zehao, Hussain, Zubiar, Wu, Yong
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container_issue 1
container_start_page 12
container_title Current microbiology
container_volume 79
creator She, Pengfei
Li, Shijia
Liu, Yaqian
Xu, Lanlan
Zhou, Linying
Zeng, Xianghai
Li, Yimin
Liu, Shasha
Li, Zehao
Hussain, Zubiar
Wu, Yong
description Pseudomonas aeruginosa is a ubiquitous bacterium found in hospitals and the surrounding environment. The ability of P. aeruginosa to form biofilms confers high-level resistance to antibiotics, and the persister cells formed in the presence of high antibacterial drug concentrations make P. aeruginosa -related infections more refractory. Further, there rarely is an effective antimicrobial alternative when biofilm- and persister cell-targeting treatment fails. Using a high-throughput screening assay, we previously identified fluoroquinolones sitafloxacin, prulifloxacin, and tosufloxacin as well as aminoglycoside sisomicin among FDA-approved drugs with significant bactericidal activity against P. aeruginosa . In addition, in our current study, these antibiotics exhibited an effective time- and dose-dependent eradication effects against the preformed biofilms of P. aeruginosa at the concentrations of 2–4 μM. These agents also exhibited bactericidal efficacy against CCCP-induced P. aeruginosa persister cells with the viable cell count decreased from 9.14 log10 CFU/mL to 6.15 (sitafloxacin), 7.59 (prulifloxacin), 4.27 (tosufloxacin), and 6.17 (sisomicin) log10 CFU/mL, respectively, following 4 h of treatment. Furthermore, sisomicin was also effective against conventional antibiotics induced persister cells in a time-dependent manner within 24 h. In addition, we confirmed the in vivo anti-biofilm efficacy of the identified antibiotics in a subcutaneous implantation biofilm-related infection model. Tosufloxacin exhibited the greatest in vivo bactericidal activity against P. aeruginosa biofilms with a reduction of 4.54 ΔLog10 CFU/mL compared to the vehicle group, followed by prulifloxacin, sitafloxacin, and sisomicin. Taken together, our results indicate that sitafloxacin, prulifloxacin, tosufloxacin, and sisomicin have great potential as alternatives for the treatment of refractory infections caused by P. aeruginosa biofilms and persister cells.
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The ability of P. aeruginosa to form biofilms confers high-level resistance to antibiotics, and the persister cells formed in the presence of high antibacterial drug concentrations make P. aeruginosa -related infections more refractory. Further, there rarely is an effective antimicrobial alternative when biofilm- and persister cell-targeting treatment fails. Using a high-throughput screening assay, we previously identified fluoroquinolones sitafloxacin, prulifloxacin, and tosufloxacin as well as aminoglycoside sisomicin among FDA-approved drugs with significant bactericidal activity against P. aeruginosa . In addition, in our current study, these antibiotics exhibited an effective time- and dose-dependent eradication effects against the preformed biofilms of P. aeruginosa at the concentrations of 2–4 μM. These agents also exhibited bactericidal efficacy against CCCP-induced P. aeruginosa persister cells with the viable cell count decreased from 9.14 log10 CFU/mL to 6.15 (sitafloxacin), 7.59 (prulifloxacin), 4.27 (tosufloxacin), and 6.17 (sisomicin) log10 CFU/mL, respectively, following 4 h of treatment. Furthermore, sisomicin was also effective against conventional antibiotics induced persister cells in a time-dependent manner within 24 h. In addition, we confirmed the in vivo anti-biofilm efficacy of the identified antibiotics in a subcutaneous implantation biofilm-related infection model. Tosufloxacin exhibited the greatest in vivo bactericidal activity against P. aeruginosa biofilms with a reduction of 4.54 ΔLog10 CFU/mL compared to the vehicle group, followed by prulifloxacin, sitafloxacin, and sisomicin. 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subjects Aminoglycoside antibiotics
Aminoglycosides
Anti-Bacterial Agents - pharmacology
Anti-Infective Agents
Antibiotics
Antiinfectives and antibacterials
Antimicrobial agents
Bactericidal activity
Biofilms
Biomedical and Life Sciences
Biotechnology
Dioxolanes
Drug Repositioning
Fluoroquinolones
Fluoroquinolones - pharmacology
High-throughput screening
Life Sciences
Microbial Sensitivity Tests
Microbiology
Naphthyridines
Piperazines
Pseudomonas aeruginosa
Sisomicin
Time dependence
Tosufloxacin
title Repurposing Sitafloxacin, Prulifloxacin, Tosufloxacin, and Sisomicin as Antimicrobials Against Biofilm and Persister Cells of Pseudomonas aeruginosa
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