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Disarming the virulence arsenal of Pseudomonas aeruginosa by blocking two-component system signaling

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Abstract

Pseudomonas aeruginosa infections have reached a “critical” threat status making novel therapeutic approaches required. Inhibiting key signaling enzymes known as the histidine kinases (HKs), which are heavily involved with its pathogenicity, has been postulated to be an effective new strategy for treatment. Herein, we demonstrate the potential of this approach with benzothiazole-based HK inhibitors that perturb multiple virulence pathways in the burn wound P. aeruginosa isolate, PA14. Specifically, our compounds significantly reduce the level of toxic metabolites generated by this organism that are involved in quorum-sensing and redox-balancing mechanisms. They also decrease the ability of this organism to swarm and attach to surfaces, likely by influencing their motility appendages. Quantitative transcription analysis of inhibitor-treated cultures showed substantial perturbations to multiple pathways including expression of response regulator GacA, the cognate partner of the “super regulator” of virulence, HK GacS, as well as flagella and pili formation. These promising results establish that blocking of bacterial signaling in P. aeruginosa has dramatic consequences on virulence behaviours, especially in the context of surface-associated infections.

Graphical abstract: Disarming the virulence arsenal of Pseudomonas aeruginosa by blocking two-component system signaling

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Publication details

The article was received on 07 Jun 2018, accepted on 06 Jul 2018 and first published on 10 Jul 2018


Article type: Edge Article
DOI: 10.1039/C8SC02496K
Citation: Chem. Sci., 2018, Advance Article
  • Open access: Creative Commons BY license
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    Disarming the virulence arsenal of Pseudomonas aeruginosa by blocking two-component system signaling

    M. Goswami, A. Espinasse and E. E. Carlson, Chem. Sci., 2018, Advance Article , DOI: 10.1039/C8SC02496K

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