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• W3034283669 abstract "Quorum sensing inhibitors (QSIs) that specifically interfere with bacterial cell-to-cell communication are considered as an alternative approach to conventional antibacterial therapy. In our study, a set of twenty-six fumardiamides with a quinoline head-group were evaluated as potential QSIs. Two strains of Gram-negative Chromobacterium violaceum (violacein-producing strain ATCC31532 and violacein-negative, mini-Tn5 mutant derivative CV026) were used as QS reporters for testing anti-QS and bactericidal activity of various quinoline fumardiamides. The initial screening of eighteen fumardiamides with primaquine, mefloquine and chloroquine scaffolds identified chloroquine derivatives as the most promising QSIs. Tail-group optimization of chloroquine fumardiamides led to the most active compounds 27, 29 and 30 bearing aminoethyl or piperidine moieties. At 400 µM concentration, these compounds inhibited the QS of C. violaceum strains in a manner similar to quercetin (the model QSI), while at the 40 µM concentration their inhibitory effect was twice less than that of quercetin. As none of the compounds displayed a bactericidal effect and that the QS inhibition was specific to the CV026 strain, our findings indicate that the structurally optimized chloroquine derivatives could function as quorum quenching (QQ) agents with a potential to block the signaling without entering the cell. In conclusion, our finding provides an important step toward the further design of agents targeting cell-to-cell communication." @default.
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• W3034283669 date "2020-08-01" @default.
• W3034283669 modified "2023-09-27" @default.
• W3034283669 title "Chloroquine fumardiamides as novel quorum sensing inhibitors" @default.
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• W3034283669 doi "https://doi.org/10.1016/j.bmcl.2020.127336" @default.
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