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http://dx.doi.org/10.4014/mbl.1908.08002

Evaluation of Ciclopirox as a Virulence-modifying Agent Against Multidrug Resistant Pseudomonas aeruginosa Clinical Isolates from Egypt  

Zakaria, Azza S. (Microbiology and Immunology Department, Faculty of Pharmacy, Alexandria University)
Edward, Eva A. (Microbiology and Immunology Department, Faculty of Pharmacy, Alexandria University)
Mohamed, Nelly M. (Microbiology and Immunology Department, Faculty of Pharmacy, Alexandria University)
Publication Information
Microbiology and Biotechnology Letters / v.47, no.4, 2019 , pp. 651-661 More about this Journal
Abstract
Targeting the pathogen viability using drugs is associated with development of drug resistance due to selective pressure. Hence, there is an increased interest in developing agents that target bacterial virulence. In this study, the inhibitory effect of ciclopirox, an antifungal agent with iron chelation potential, on the microbial virulence factors was evaluated in 26 clinical MDR Pseudomonas aeruginosa isolates collected from Alexandria Main University Hospital, a tertiary hospital in Egypt. Treatment with 9 ㎍/ml ciclopirox inhibited the hemolytic activity in 70% isolates, reduced pyocyanin production, decreased protease secretion in 46% isolates, lowered twitching and swarming motility, and decreased biofilm formation by 1.5- to 4.5-fold. The quantitative real-time PCR analysis revealed that treatment with ciclopirox downregulated the expression levels of alkaline protease (aprA) and pyocyanin (phzA1). Ciclopirox is used to treat hematological malignancies and the systemic administration of ciclopirox is reported to have adequate oral absorption with a satisfactory drug safety profile. It is important to calculate the appropriate clinical dose and therapeutic index to reposition ciclopirox from a topical antifungal agent to a promising virulence-modifying agent agent against P. aeruginosa, a problematic Gram-negative pathogen.
Keywords
Ciclopirox; virulence factors; Pseudomonas aeruginosa; biofilm; gene expression;
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