Issue 5, 2019

Eradicating uropathogenic Escherichia coli biofilms with a ciprofloxacin–dinitroxide conjugate

Abstract

Urinary tract infections (UTIs) are amongst the most common and prevalent infectious diseases worldwide, with uropathogenic Escherichia coli (UPEC) reported as the main causative pathogen. Fluoroquinolone antibiotics are commonly used to treat UTIs but for infections involving UPEC biofilms, which are commonly associated with catheter use and recurrent episodes, ciprofloxacin is often ineffective. Here we report the development of a ciprofloxacin–dinitroxide (CDN) conjugate with potent UPEC biofilm-eradication activity. CDN 11 exhibited a 2-fold increase in potency over the parent antibiotic ciprofloxacin against UPEC biofilms. Moreover, CDN 11 resulted in almost complete UPEC biofilm cell eradication (99.7%) at concentrations as low as 12.5 μM, and significantly potentiated ciprofloxacin's biofilm-eradication activity against UPEC upon co-administration. The biofilm-eradication activity of CDN 11 highlights the potential of nitroxide functionalized antibiotics as a promising strategy for the treatment of biofilm-related UTIs.

Graphical abstract: Eradicating uropathogenic Escherichia coli biofilms with a ciprofloxacin–dinitroxide conjugate

Supplementary files

Article information

Article type
Research Article
Submitted
01 Feb 2019
Accepted
19 Feb 2019
First published
25 Feb 2019

Med. Chem. Commun., 2019,10, 699-711

Eradicating uropathogenic Escherichia coli biofilms with a ciprofloxacin–dinitroxide conjugate

A. D. Verderosa, J. Harris, R. Dhouib, M. Totsika and K. E. Fairfull-Smith, Med. Chem. Commun., 2019, 10, 699 DOI: 10.1039/C9MD00062C

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