Massively parallel mutant selection identifies genetic determinants of Pseudomonas aeruginosa colonization of Drosophila melanogaster .

Autor:	Miles J; Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, Connecticut, USA.; Graduate Program in Microbiology, Yale University, New Haven, Connecticut, USA., Lozano GL; Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, Connecticut, USA., Rajendhran J; Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, Connecticut, USA., Stabb EV; Department of Biological Sciences, University of Illinois Chicago, Chicago, Illinois, USA., Handelsman J; Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, Connecticut, USA., Broderick NA; Department of Biology, Johns Hopkins University, Baltimore, Maryland, USA.
Jazyk:	angličtina
Zdroj:	MSystems [mSystems] 2024 Mar 19; Vol. 9 (3), pp. e0131723. Date of Electronic Publication: 2024 Feb 21.
DOI:	10.1128/msystems.01317-23
Abstrakt:	Pseudomonas aeruginosa is recognized for its ability to colonize diverse habitats and cause disease in a variety of hosts, including plants, invertebrates, and mammals. Understanding how this bacterium is able to occupy wide-ranging niches is important for deciphering its ecology. We used transposon sequencing [Tn-Seq, also known as insertion sequencing (INSeq)] to identify genes in P. aeruginosa that contribute to fitness during the colonization of Drosophila melanogaster . Our results reveal a suite of critical factors, including those that contribute to polysaccharide production, DNA repair, metabolism, and respiration. Comparison of candidate genes with fitness determinants discovered in previous studies on P. aeruginosa identified several genes required for colonization and virulence determinants that are conserved across hosts and tissues. This analysis provides evidence for both the conservation of function of several genes across systems, as well as host-specific functions. These findings, which represent the first use of transposon sequencing of a gut pathogen in Drosophila , demonstrate the power of Tn-Seq in the fly model system and advance the existing knowledge of intestinal pathogenesis by D. melanogaster, revealing bacterial colonization determinants that contribute to a comprehensive portrait of P. aeruginosa lifestyles across habitats.IMPORTANCE Drosophila melanogaster is a powerful model for understanding host-pathogen interactions. Research with this system has yielded notable insights into mechanisms of host immunity and defense, many of which emerged from the analysis of bacterial mutants defective for well-characterized virulence factors. These foundational studies-and advances in high-throughput sequencing of transposon mutants-support unbiased screens of bacterial mutants in the fly. To investigate mechanisms of host-pathogen interplay and exploit the tractability of this model host, we used a high-throughput, genome-wide mutant analysis to find genes that enable the pathogen P. aeruginosa to colonize the fly. Our analysis reveals critical mediators of P. aeruginosa establishment in its host, some of which are required across fly and mouse systems. These findings demonstrate the utility of massively parallel mutant analysis and provide a platform for aligning the fly toolkit with comprehensive bacterial genomics. Competing Interests: The authors declare no conflict of interest.
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu