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Updated: Aug 22, 2025
10:51
The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
Published on: April 10, 2015
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Siderophore-Linked Ruthenium Catalysts for Targeted Allyl Ester Prodrug Activation within Bacterial Cells
James W Southwell1, Reyme Herman2, Daniel J Raines1
1University of York, Department of Chemistry, Heslington, York, YO10 5DD, UK.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|November 10, 2022
Summary
New siderophore-linked ruthenium catalysts activate antibacterial prodrugs within bacterial cells. This strategy shows promise for targeted drug delivery and combating antibiotic resistance, with minimal toxicity to mammalian cells.
Area of Science:
- Medicinal Chemistry
- Catalysis
- Antimicrobial Resistance
Background:
- Rising antibiotic resistance necessitates novel strategies for targeted drug delivery.
- Siderophores, bacterial iron-chelating molecules, are explored as vectors for antibacterial agents, exemplified by cefiderocol.
- Small-molecule catalysts offer potential for intracellular prodrug activation.
Purpose of the Study:
- To investigate siderophore-linked ruthenium catalysts for activating antibacterial prodrugs within cells.
- To synthesize and evaluate moxifloxacin-based prodrugs activated by these catalysts.
- To assess the efficacy and toxicity of the developed system.
Main Methods:
- Synthesis of moxifloxacin-based prodrugs conjugated to siderophore-linked ruthenium catalysts.
- Demonstration of catalyst-mediated prodrug activation under anaerobic, biologically relevant conditions.
- Evaluation of antibacterial activity against Escherichia coli K12 (BW25113) and toxicity in mammalian cell lines.
Main Results:
- Catalyst-mediated activation of moxifloxacin prodrugs was confirmed under relevant conditions.
- Siderophore-linked catalysts showed a combined antibacterial effect with the prodrug.
- A representative catalyst exhibited low toxicity towards mammalian cell lines.
- Catechol and azotochelin-based siderophore conjugates were most effective for intracellular prodrug activation.
Conclusions:
- Siderophore-ruthenium catalyst conjugates represent a promising approach for intracellular activation of antibacterial prodrugs.
- This targeted activation strategy can enhance antibacterial efficacy while minimizing off-target effects.
- Further development of these conjugates could provide new tools against bacterial infections and combat antibiotic resistance.
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