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A multidrug resistant clinical P. aeruginosa isolate in the MLST550 clonal complex: uncoupled quorum sensing modulates the interplay of virulence and resistance
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PreprintAuthors
Cao, HuiluoXia, Tingying
Li, Yanran
Xu, Zeling
Bougouffa, Salim
Lo, Yat Kei
Bajic, Vladimir B.
Luo, Haiwei
Woo, Patrick C. Y.
Yan, Aixin
KAUST Department
Computational Bioscience Research Center (CBRC)Date
2018-09-12Permanent link to this record
http://hdl.handle.net/10754/628757.1
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Pseudomonas aeruginosa is a prevalent and pernicious pathogen equipped with both extraordinary capabilities to infect the host and to develop antimicrobials resistance (AMR). Monitoring the emergence of AMR high risk clones and understanding the interplay of their pathogenicity and antibiotic resistance is of paramount importance to avoid resistance dissemination and to control <P.aeruginosa infections. In this study, we report the identification of a multidrug resistant (MDR) P.aeruginosa strain PA154197 isolated from a blood stream infection in Hong Kong. PA154197 belongs to a distinctive MLST550 clonal complex shared by two international P.aeruginosa isolates VW0289 and AUS544. Comparative genome and transcriptome analysis with the reference strain PAO1 led to the identification of a variety of genetic variations in antibiotic resistance genes and the hyper-expression of three multidrug efflux pumps MexAB-OprM, MexEF-OprN, and MexGHI-OpmD in PA154197. Unlike many resistant isolates displaying an attenuated virulence, PA154197 produces a significantly high level of the P.aeruginosa major virulence factor pyocyanin (PYO) and displays an uncompromised virulence compared to PAO1. Further analysis revealed that the secondary quorum sensing system Pqs which primarily controls the PYO production is hyper-active in PA154197 independent of the master QS systems Las and Rhl. Together, these investigations disclose a unique, uncoupled QS mediated pathoadaptation mechanism inclinical P.aeruginosa which may account for the high pathogenic potentials and antibiotics resistance in the MDR isolate PA154197.Citation
Cao H, Xia T, Li Y, Xu zeling, Bougouffa S, et al. (2018) A multidrug resistant clinical P. aeruginosa isolate in the MLST550 clonal complex: uncoupled quorum sensing modulates the interplay of virulence and resistance. Available: http://dx.doi.org/10.1101/415000.Sponsors
We thank Dr. Karen Yuen (School of Biological Sciences, HKU) for her help to establish the C. elegans killing assay. This work is supported by the Hong Kong University Grants Council General Research Fund (17142316, to AY), Seed Funding for Strategic Interdisciplinary Research Scheme (HKU 2017, to AY), and Shenzhen City Knowledge Innovation Plan (JCYJ20160530174441706 to AY).Publisher
Cold Spring Harbor LaboratoryDOI
10.1101/415000Additional Links
https://www.biorxiv.org/content/early/2018/09/12/415000ae974a485f413a2113503eed53cd6c53
10.1101/415000
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