Issue 30, 2012

Design, synthesis and biological evaluation of non-natural modulators of quorum sensing in Pseudomonas aeruginosa

Abstract

Many species of bacteria employ a mechanism of intercellular communication known as quorum sensing which is mediated by small diffusible signalling molecules termed autoinducers. The most common class of autoinducer used by Gram-negative bacteria are N-acylated-L-homoserine lactones (AHLs). Pseudomonas aeruginosa is a clinically important bacterium which is known to use AHL-mediated quorum sensing systems to regulate a variety of processes associated with virulence. Thus the selective disruption of AHL-based quorum sensing represents a strategy to attenuate the pathogenicity of this bacterium. Herein we describe the design, synthesis and biological evaluation of a collection of structurally novel AHL mimics. A number of new compounds capable of modulating the LasR-dependent quorum sensing system of P. aeruginosa were identified, which could have value as molecular tools to study and manipulate this signalling pathway. Worthy of particular note, this research has delivered novel potent quorum sensing antagonists, which strongly inhibit the production of virulence factors in a wild type strain of this pathogenic bacterium.

Graphical abstract: Design, synthesis and biological evaluation of non-natural modulators of quorum sensing in Pseudomonas aeruginosa

Supplementary files

Article information

Article type
Paper
Submitted
26 jan 2012
Accepted
06 mar 2012
First published
09 mar 2012

Org. Biomol. Chem., 2012,10, 6032-6044

Design, synthesis and biological evaluation of non-natural modulators of quorum sensing in Pseudomonas aeruginosa

J. T. Hodgkinson, W. R. J. D. Galloway, M. Wright, I. K. Mati, R. L. Nicholson, M. Welch and D. R. Spring, Org. Biomol. Chem., 2012, 10, 6032 DOI: 10.1039/C2OB25198A

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