In Vitro Evaluation of Anticancer Drugs as Antimicrobial Agent against the Pathogenic Enteric Bacteria

  • Pranjali Gupta Department of Biotechnology, Graphic Era University, Dehradun, India
  • Pankaj Gautam Department of Biotechnology, Graphic Era University, Dehradun, India
  • Nishant Rai Department of Biotechnology, Graphic Era University, Dehradun, India
Keywords: Anticancer Drugs, Drug Repurposing, Efflux Pump Inhibitor, Multidrug Resistance, SalmonellaTyphi

Abstract

Drug repurposing and drug combination have been suggested as a major strategy to counter the spread of antimicrobial resistance in clinical and community settings. Drug repurposing explores the potential of existing drugs for new indications with respect to human disease. Mainstream anticancer drug paclitaxel and vinblastine were tested as potential efflux pump inhibitors in in vitro assays. Both the anticancer drugs failed to produce zone of inhibition on MHA plates inoculated with Salmonella Typhi in disk diffusion testing. MIC obtained for the two drugs were found as 80μg/ml (Paclitaxel) and 160 μg/ml (vinblastine) respectively. When tested for synergy with kanamycin and ciprofloxacin, paclitaxel and vinblastine resulted in indifference (FICI value=1 for both the antibiotics). The combination of anticancer and antibiotic drugs showed bacteriostatic nature in the absence of 3log10 reduction in viable Salmonella CFUs over 24 hrs time period in time kill assay. Whereas the marginal activity was observed in EtBr cartwheel assay as compared to control.Thus in vitro studies paclitaxel and vinblastine cannot be repurposed as antimicrobial against Salmonella Typhi.

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Published
2017-09-22
Section
Articles