The Antibacterial Drug Candidate SBC3 is a Potent Inhibitor of Bacterial Thioredoxin Reductase |
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Authors: | Jennie O'Loughlin Silvia Napolitano Fahad Alkhathami Cillian O'Beirne Daniel Marhöfer Megan O'Shaughnessy Prof Orla Howe Prof Matthias Tacke Dr Marina Rubini |
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Affiliation: | 1. School of Chemistry, University College Dublin Belfield, Dublin 4, Ireland;2. Department of Molecular Biology and Biophysics, ETH, Otto-Stern-Weg 5, 8093 Zürich, Switzerland;3. School of Biological and Health Sciences, Technical University Dublin, City Campus, Dublin, Ireland |
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Abstract: | Antibiotic resistance is a growing problem for public health and associated with increasing economic costs and mortality rates. Silver and silver-related compounds have been used for centuries due to their antimicrobial properties. In this work, we show that 1,3-dibenzyl-4,5-diphenyl-imidazol-2-ylidene silver(I) acetate/NHC*-Ag-OAc (SBC3) is a reversible, high affinity inhibitor of E. coli thioredoxin reductase (TrxR; Ki=10.8±1.2 nM). Minimal inhibition concentration (MIC) tests with different E. coli and P. aeruginosa strains demonstrated that SBC3 can efficiently inhibit bacterial cell growth, especially in combination with established antibiotics like gentamicin. Our results show that SBC3 is a promising antibiotic drug candidate targeting bacterial TrxR. |
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Keywords: | antibiotic resistance antibiotics inhibitors NHC-metal complexes thioredoxin reductase |
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