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. 2023 Oct 4;24(19):e202300247.
doi: 10.1002/cbic.202300247. Epub 2023 Sep 5.

The Antimicrobial Properties of PdII - and RuII -pyta Complexes

Affiliations

The Antimicrobial Properties of PdII - and RuII -pyta Complexes

Annick van Niekerk et al. Chembiochem. .

Abstract

Infections associated with antimicrobial resistance (AMR) are poised to become the leading cause of death in the next few decades, a scenario that can be ascribed to two phenomena: antibiotic over-prescription and a lack of antibiotic drug development. The crowd-sourced initiative Community for Open Antimicrobial Drug Discovery (CO-ADD) has been testing research compounds contributed by researchers around the world to find new antimicrobials to combat AMR, and during this campaign has found that metallodrugs might be a promising, yet untapped source. To this end, we submitted 18 PdII - and RuII -pyridyl-1,2,3-triazolyl complexes that were developed as catalysts to assess their antimicrobial properties. It was found that the Pd complexes, especially Pd1, possessed potent antifungal activity with MICs between 0.06 and 0.125 μg mL-1 against Candida glabrata. The in-vitro studies were extended to in-vivo studies in Galleria mellonella larvae, where it was established that the compounds were nontoxic. Here, we effectively demonstrate the potential of PdII -pyta complexes as antifungal agents.

Keywords: AMR; antifungal drugs; inorganic medicinal chemistry; metalloantibiotics; metals in medicine.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
The Pd compounds (13) from the CO‐ADD database that displayed the highest levels of activity. Complex 4 was investigated by Zalevskaya et al. The Ru–arene complex (5) investigated by Weng et al. also displayed potent activity against MRSA.
Figure 2
Figure 2
The structures of the complexes evaluated.

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