In vitro and in vivo studies on a mononuclear ruthenium complex reveals it is a highly effective, fast-acting, broad-spectrum antimicrobial in physiologically relevant conditions

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Varney, AM, Smitten, KL, Southam, HM, Fairbanks, SD, Robertson, CC, Thomas, JA and McLean, S ORCID: https://orcid.org/0000-0001-8551-4307, 2024. In vitro and in vivo studies on a mononuclear ruthenium complex reveals it is a highly effective, fast-acting, broad-spectrum antimicrobial in physiologically relevant conditions. ACS Infectious Diseases. ISSN 2373-8227

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Official URL: https://doi.org/10.1021/acsinfecdis.4c00447

Abstract

The crystal structure of a previously reported antimicrobial RuII complex that targets bacterial DNA is presented. Studies utilizing clinical isolates of Gram-negative bacteria that cause catheter-associated urinary tract infection, (CA)UTI, in media that model urine and plasma reveal that good antimicrobial activity is maintained in all conditions tested. Experiments with a series of Staphylococcus aureus clinical isolates show that, unlike the majority of previously reported RuII-based antimicrobial leads, the compound retains its potent activity even in MRSA strains. Furthermore, experiments using bacteria in early exponential growth and at different pHs reveal that the compound also retains its activity across a range of conditions that are relevant to those encountered in clinical settings. Combinatorial studies involving cotreatment with conventional antibiotics or a previously reported analogous dinuclear RuII complex showed no antagonistic effects. In fact, although all combinations show distinct additive antibacterial activity, in one case, this effect approaches synergy. It was found that the Galleria Mellonella model organism infected with a multidrug resistant strain of the ESKAPE pathogen Acinetobacter baumannii could be successfully treated and totally cleared within 48 h after a single dose of the lead complex with no detectable deleterious effect to the host.

Item Type:	Journal article
Publication Title:	ACS Infectious Diseases
Creators:	Varney, A.M., Smitten, K.L., Southam, H.M., Fairbanks, S.D., Robertson, C.C., Thomas, J.A. and McLean, S.
Publisher:	American Chemical Society (ACS)
Date:	6 August 2024
ISSN:	2373-8227
Identifiers:	Number Type 10.1021/acsinfecdis.4c00447 DOI 2191664 Other
Rights:	© 2024 The Authors. Published by American Chemical Society. This publication is licensed under CC-BY 4.0.
Divisions:	Schools > School of Science and Technology
Record created by:	Melissa Cornwell
Date Added:	12 Aug 2024 10:02
Last Modified:	12 Aug 2024 10:02
URI:	https://irep.ntu.ac.uk/id/eprint/51968