Enhancement of Antibiotic Efficacy against Multi-drug Resistant Pseudomonas Aeruginosa Infections via Combination with Curcumin and 1-(1-Naphthylmethyl)-Piperazine
Ballard E and Coote PJ*
Biomedical Sciences Research Complex, School of Biology, University of St Andrews, UK
- *Corresponding Author:
- Peter J. Coote
B.Sc, Ph.D, Biomedical Sciences Research Complex
School of Biology, University of St Andrews
The North Haugh, St Andrews
Fife. KY16 9ST, UK
Tel: (44) (0)1334 463406
Fax: (44) (0)1334 462595
E-mail: [email protected]
Received date: March 25, 2016; Accepted date: May 05, 2016; Published date: May 20, 2016
Citation: Ballard E, Coote PJ (2016) Enhancement of Antibiotic Efficacy against Multi-drug Resistant Pseudomonas Aeruginosa Infections via Combination with Curcumin and 1-(1-Naphthylmethyl)-Piperazine. J Antimicro 2:116. doi:10.4172/2472-1212.1000116
Copyright: © 2016 Ballard E, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Objective: The aim of this study was to determine if the plant phenolic curcumin (CUR) and the arylpiperazine 1-(1-naphthylmethyl)-piperazine (NMP) could restore antibiotic efficacy versus MDR P. aeruginosa infection.
Methods: The MICs of piperacillin, meropenem and levofloxacin in the presence or absence of CUR or NMP against a MDR strain that over-expresses the MexAB-OprM efflux-pump and the isogenic parent strain were compared. The efficacy of the same combination treatments was also tested in a Galleria mellonella in vivo infection model and larval survival and bacterial burden compared.
Results: In vitro, CUR restored the activity of piperacillin, meropenem and levofloxacin versus the MDR strain of P. aeruginosa only weakly. There was no evidence in vitro of a similar effect with NMP. In vivo, treatment of G. mellonella larvae infected with the MDR strain with a combination of NMP or CUR plus levofloxacin, and piperacillin plus CUR, resulted in enhanced therapeutic benefit compared to the monotherapies. When compared with monotherapies, the enhanced efficacy of the combination treatments correlated with reduced bacterial burden.Conclusion: CUR and NMP restored the efficacy of antibiotic therapy in vivo versus MDR P. aeruginosa infection.