کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1397335 | 1501137 | 2014 | 11 صفحه PDF | دانلود رایگان |
• A new series of PqsR ligands was synthesized.
• The structure–activity and structure–property relationships were investigated.
• The solubility and anti-virulence activity of the compounds were improved.
• A potent compound efficiently attenuated virulence factor pyocyanin (IC50: 3.8 μM).
Increasing antibiotic resistance urgently requires novel therapeutic options to combat bacterial infections. The anti-virulence therapy selectively intervening with pathogenicity without affecting bacterial viability is such a strategy to overcome resistance. We consider the virulence regulator PqsR as an attractive target in the human pathogen Pseudomonas aeruginosa, and recently discovered the first PqsR antagonists, which, however, suffered from poor aqueous solubility. In this work, the antagonists were structurally modified to become more soluble, and their structure–activity as well as structure–property relationships were studied. A novel promising compound with improved solubility and enhanced anti-virulence activity was discovered (IC50: 3.8 μM, pyocyanin). Our findings emphasize the crucial role of substituents at the 3-position and the carbonyl group at the 4-position for ligand–receptor interactions, and illuminate the way for further optimization of PqsR antagonists as anti-virulence agents.
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Journal: European Journal of Medicinal Chemistry - Volume 79, 22 May 2014, Pages 173–183