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Synergistic efficacy of Bisbenzimidazole and Carbonyl Cyanide 3-Chlorophenylhydrazone combination against MDR bacterial strains.
Sinha, Devapriya; Pandey, Stuti; Singh, Raja; Tiwari, Vinod; Sad, Kirti; Tandon, Vibha.
Affiliation
  • Sinha D; Chemical Biology laboratory, Department of Chemistry, University of Delhi, Delhi, India.
  • Pandey S; Chemical Biology laboratory, Department of Chemistry, University of Delhi, Delhi, India.
  • Singh R; Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi, India.
  • Tiwari V; Chemical Biology laboratory, Department of Chemistry, University of Delhi, Delhi, India.
  • Sad K; Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi, India.
  • Tandon V; Chemical Biology laboratory, Department of Chemistry, University of Delhi, Delhi, India.
Sci Rep ; 7: 44419, 2017 03 17.
Article in En | MEDLINE | ID: mdl-28303897
ABSTRACT
Activation of efflux systems and the formation of biofilm are majorly adapted by microbes to resist antimicrobial agents. PPEF (bisbenzimidazole) targeting topoisomerase IA is observed to be an effective bactericidal agent against both Gram-positive and Gram-negative bacterial strains and thus can be developed as potent broad-spectrum antibiotic against MDR strains. PPEF treatment did not cause target specific mutation instead it leads to up-regulation of efflux gene in E. coli K12 as a mechanism of resistance. Microscopy, fluorescence spectroscopy and flow cytometry result demonstrate higher accumulation of PPEF in efflux gene deleted E. coli K12 mutants, and also suggest that Carbonyl Cyanide 3-Chlorophenylhydrazone (CCCP), resist the efflux of PPEF, and thus increases efficacy of PPEF. Herein, we report, PPEF and CCCP synergistically killed the persistent bacterial cells, which are not killed by PPEF alone. The above two compounds together inhibited biofilm formation, eradicate preformed biofilms and kills the biofilm cells of P. aeruginosa. PPEF and CCCP together reduced bacterial load of E. coli ATCC25922 by 6 log10 in neutropenic thigh infection model of balb/c mice. Present study suggests that combination therapy could be a promising antimicrobial strategy to handle MDR pathogenic strains.
Subject(s)

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Biofilms / Drug Resistance, Multiple, Bacterial / Escherichia coli Infections / Bisbenzimidazole / Hydrazones / Anti-Bacterial Agents Limits: Animals Language: En Journal: Sci Rep Year: 2017 Document type: Article Affiliation country: India

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Biofilms / Drug Resistance, Multiple, Bacterial / Escherichia coli Infections / Bisbenzimidazole / Hydrazones / Anti-Bacterial Agents Limits: Animals Language: En Journal: Sci Rep Year: 2017 Document type: Article Affiliation country: India