Journal article
Inhibition of the Injectisome and Flagellar Type III Secretion Systems by INP1855 Impairs Pseudomonas aeruginosa Pathogenicity and Inflammasome Activation
The Journal of infectious diseases, Vol.214(7), pp.1105-1116
10/01/2016
DOI: 10.1093/infdis/jiw295
PMID: 27412581
Abstract
With the rise of multidrug resistance, Pseudomonas aeruginosa infections require alternative therapeutics. The injectisome (iT3SS) and flagellar (fT3SS) type III secretion systems are 2 virulence factors associated with poor clinical outcomes. iT3SS translocates toxins, rod, needle, or regulator proteins, and flagellin into the host cell cytoplasm and causes cytotoxicity and NLRC4-dependent inflammasome activation, which induces interleukin 1β (IL-1β) release and reduces interleukin 17 (IL-17) production and bacterial clearance. fT3SS ensures bacterial motility, attachment to the host cells, and triggers inflammation. INP1855 is an iT3SS inhibitor identified by in vitro screening, using Yersinia pseudotuberculosis Using a mouse model of P. aeruginosa pulmonary infection, we show that INP1855 improves survival after infection with an iT3SS-positive strain, reduces bacterial pathogenicity and dissemination and IL-1β secretion, and increases IL-17 secretion. INP1855 also modified the cytokine balance in mice infected with an iT3SS-negative, fT3SS-positive strain. In vitro, INP1855 impaired iT3SS and fT3SS functionality, as evidenced by a reduction in secretory activity and flagellar motility and an increase in adenosine triphosphate levels. As a result, INP1855 decreased cytotoxicity mediated by toxins and by inflammasome activation induced by both laboratory strains and clinical isolates. We conclude that INP1855 acts by dual inhibition of iT3SS and fT3SS and represents a promising therapeutic approach.
Details
- Title: Subtitle
- Inhibition of the Injectisome and Flagellar Type III Secretion Systems by INP1855 Impairs Pseudomonas aeruginosa Pathogenicity and Inflammasome Activation
- Creators
- Ahalieyah Anantharajah - Pharmacologie cellulaire et moléculaire, Louvain Drug Research Institute, Université catholique de Louvain, Brussels, BelgiumEmmanuel Faure - EA7366, Host-Pathogen Translational Research Group, Faculté de Médecine, Université Lille Nord de France, Lille, FranceJulien M Buyck - Pharmacologie cellulaire et moléculaire, Louvain Drug Research Institute, Université catholique de Louvain, Brussels, BelgiumCharlotta Sundin - Creative Antibiotics, Umeå, SwedenTuulikki Lindmark - Creative Antibiotics, Umeå, SwedenJoan Mecsas - Department of Molecular Biology and Microbiology, Tufts University School of Medicine, Boston, MassachusettsTimothy L Yahr - Department of Microbiology, University of Iowa, Iowa CityPaul M Tulkens - Pharmacologie cellulaire et moléculaire, Louvain Drug Research Institute, Université catholique de Louvain, Brussels, BelgiumMarie-Paule Mingeot-Leclercq - Pharmacologie cellulaire et moléculaire, Louvain Drug Research Institute, Université catholique de Louvain, Brussels, BelgiumBenoît Guery - EA7366, Host-Pathogen Translational Research Group, Faculté de Médecine, Université Lille Nord de France, Lille, FranceFrançoise Van Bambeke - Pharmacologie cellulaire et moléculaire, Louvain Drug Research Institute, Université catholique de Louvain, Brussels, Belgium
- Resource Type
- Journal article
- Publication Details
- The Journal of infectious diseases, Vol.214(7), pp.1105-1116
- Publisher
- United States
- DOI
- 10.1093/infdis/jiw295
- PMID
- 27412581
- ISSN
- 0022-1899
- eISSN
- 1537-6613
- Grant note
- DOI: 10.13039/501100002661, name: Fonds de la Recherche Scientifique, award: 3.4530.12, T.0134.13; name: Interuniversity Attraction Poles Program, initiated by the Belgian Science Policy Office, award: IAP, P7/28
- Language
- English
- Date published
- 10/01/2016
- Academic Unit
- Microbiology and Immunology
- Record Identifier
- 9984001211202771
Metrics
30 Record Views