design and synthesis of lactams derived from mucochloric and mucobromic acids as pseudomonas aeruginosa quorum sensing inhibitors
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ID: 242783
2018
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Abstract
Bacterial infections, particularly hospital-acquired infections caused by Pseudomonas aeruginosa, have become a global threat with a high mortality rate. Gram-negative bacteria including P. aeruginosa employ N-acyl homoserine lactones (AHLs) as chemical signals to regulate the expression of pathogenic phenotypes through a mechanism called quorum sensing (QS). Recently, strategies targeting bacterial behaviour or QS have received great attention due to their ability to disarm rather than kill pathogenic bacteria, which lowers the evolutionary burden on bacteria and the risk of resistance development. In the present study, we report the design and synthesis of N-alkyl- and N-aryl 3,4 dichloro- and 3,4-dibromopyrrole-2-one derivatives through the reductive amination of mucochloric and mucobromic acid with aliphatic and aromatic amines. The quorum sensing inhibition (QSI) activity of the synthesized compounds was determined against a P. aeruginosa MH602 reporter strain. The phenolic compounds exhibited the best activity with 80% and 75% QSI at 250 µM and were comparable in activity to the positive control compound Fu-30. Computational docking studies performed using the LasR receptor protein of P. aeruginosa suggested the importance of hydrogen bonding and hydrophobic interactions for QSI.
| Reference Key |
almohaywi2018moleculesdesign
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|---|---|
| Authors | ;Basmah Almohaywi;Aditi Taunk;Daniel S. Wenholz;Shashidhar Nizalapur;Nripendra N. Biswas;Kitty K. K. Ho;Scott A. Rice;George Iskander;David StC. Black;Renate Griffith;Naresh Kumar |
| Journal | Journal of ethnopharmacology |
| Year | 2018 |
| DOI |
10.3390/molecules23051106
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| URL | |
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