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• W2802605497 abstract "ABSTRACT Salmonella enterica , a common cause of diarrhea, has to colonize the gut lumen to elicit disease. In the gut, the pathogen encounters a vast array of environmental stresses that cause perturbations in the bacterial envelope. The CpxRA two-component system monitors envelope perturbations and responds by altering the bacterial gene expression profile. This allows Salmonella to survive under such harmful conditions. Therefore, CpxRA activation is likely to contribute to Salmonella gut infection. However, the role of the CpxRA-mediated envelope stress response in Salmonella -induced diarrhea is unclear. Here, we show that CpxRA is dispensable for the induction of colitis by S. enterica serovar Typhimurium, whereas it is required for gut colonization. We prove that CpxRA is expressed during gut infection and that the presence of antimicrobial peptides in growth media activates the expression of CpxRA-regulated genes. In addition, we demonstrate that a S . Typhimurium strain lacking the cpxRA gene is able to cause colitis but is unable to continuously colonize the gut. Finally, we show that CpxRA-dependent gut colonization requires the host gut inflammatory response, while DegP, a CpxRA-regulated protease, is dispensable. Our findings reveal that the CpxRA-mediated envelope stress response plays a crucial role in Salmonella gut infection, suggesting that CpxRA might be a promising therapeutic target for infectious diarrhea." @default.
• W2802605497 created "2018-05-17" @default.
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• W2802605497 date "2018-07-01" @default.
• W2802605497 modified "2023-10-14" @default.
• W2802605497 title "Salmonella enterica Serovar Typhimurium CpxRA Two-Component System Contributes to Gut Colonization in Salmonella-Induced Colitis" @default.
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• W2802605497 doi "https://doi.org/10.1128/iai.00280-18" @default.
• W2802605497 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6013652" @default.
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