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Int. J. Mol. Sci. 2013, 14(9), 17694-17728; doi:10.3390/ijms140917694

Small Molecule Inhibitors of AI-2 Signaling in Bacteria: State-of-the-Art and Future Perspectives for Anti-Quorum Sensing Agents

Department of Chemistry and Biochemistry, University of Maryland, Building 091, College Park, MD 20742, USA
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Received: 3 June 2013 / Revised: 9 August 2013 / Accepted: 9 August 2013 / Published: 29 August 2013
(This article belongs to the Special Issue Quorum Sensing Research in Microbial Systems)

Abstract

Bacteria respond to different small molecules that are produced by other neighboring bacteria. These molecules, called autoinducers, are classified as intraspecies (i.e., molecules produced and perceived by the same bacterial species) or interspecies (molecules that are produced and sensed between different bacterial species). AI-2 has been proposed as an interspecies autoinducer and has been shown to regulate different bacterial physiology as well as affect virulence factor production and biofilm formation in some bacteria, including bacteria of clinical relevance. Several groups have embarked on the development of small molecules that could be used to perturb AI-2 signaling in bacteria, with the ultimate goal that these molecules could be used to inhibit bacterial virulence and biofilm formation. Additionally, these molecules have the potential to be used in synthetic biology applications whereby these small molecules are used as inputs to switch on and off AI-2 receptors. In this review, we highlight the state-of-the-art in the development of small molecules that perturb AI-2 signaling in bacteria and offer our perspective on the future development and applications of these classes of molecules.
Keywords: quorum sensing; virulence; biofilm formation; bacteria; autoinducer; antagonists; AI-2 quorum sensing; virulence; biofilm formation; bacteria; autoinducer; antagonists; AI-2
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Guo, M.; Gamby, S.; Zheng, Y.; Sintim, H.O. Small Molecule Inhibitors of AI-2 Signaling in Bacteria: State-of-the-Art and Future Perspectives for Anti-Quorum Sensing Agents. Int. J. Mol. Sci. 2013, 14, 17694-17728.

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