A microbiota-generated bile salt induces ...
Type de document :
Article dans une revue scientifique
URL permanente :
Titre :
A microbiota-generated bile salt induces biofilm formation in Clostridium difficile
Auteur(s) :
Dubois, Thomas [Auteur]
Pathogénèse des Bactéries Anaérobies / Pathogenesis of Bacterial Anaerobes [PBA (U-Pasteur_6)]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Tremblay, Yannick D. N. [Auteur]
Hamiot, Audrey [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Pathogénèse des Bactéries Anaérobies / Pathogenesis of Bacterial Anaerobes [PBA (U-Pasteur_6)]
Martin-Verstraete, Isabelle [Auteur]
Deschamps, Julien [Auteur]
Monot, Marc [Auteur]
Briandet, Romain [Auteur]
Dupuy, Bruno [Auteur]
Pathogénèse des Bactéries Anaérobies / Pathogenesis of Bacterial Anaerobes [PBA (U-Pasteur_6)]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Tremblay, Yannick D. N. [Auteur]
Hamiot, Audrey [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Pathogénèse des Bactéries Anaérobies / Pathogenesis of Bacterial Anaerobes [PBA (U-Pasteur_6)]
Martin-Verstraete, Isabelle [Auteur]
Deschamps, Julien [Auteur]
Monot, Marc [Auteur]
Briandet, Romain [Auteur]
Dupuy, Bruno [Auteur]
Titre de la revue :
npj Biofilms and Microbiomes
Numéro :
5
Éditeur :
Springer Science and Business Media LLC
Date de publication :
2019-05-09
ISSN :
2055-5008
Mot(s)-clé(s) en anglais :
Bacteriology
Biofilms
Pathogens
Biofilms
Pathogens
Discipline(s) HAL :
Sciences du Vivant [q-bio]/Ingénierie des aliments
Résumé en anglais : [en]
Clostridium difficile is a major cause of nosocomial infections. Bacterial persistence in the gut is responsible for infection relapse; sporulation and other unidentified mechanisms contribute to this process. Intestinal ...
Lire la suite >Clostridium difficile is a major cause of nosocomial infections. Bacterial persistence in the gut is responsible for infection relapse; sporulation and other unidentified mechanisms contribute to this process. Intestinal bile salts cholate and deoxycholate stimulate spore germination, while deoxycholate kills vegetative cells. Here, we report that sub-lethal concentrations of deoxycholate stimulate biofilm formation, which protects C. difficile from antimicrobial compounds. The biofilm matrix is composed of extracellular DNA and proteinaceous factors that promote biofilm stability. Transcriptomic analysis indicates that deoxycholate induces metabolic pathways and cell envelope reorganization, and represses toxin and spore production. In support of the transcriptomic analysis, we show that global metabolic regulators and an uncharacterized lipoprotein contribute to deoxycholateinduced biofilm formation. Finally, Clostridium scindens enhances biofilm formation of C. difficile by converting cholate into deoxycholate. Together, our results suggest that deoxycholate is an intestinal signal that induces C. difficile persistence and may increase the risk of relapse.Lire moins >
Lire la suite >Clostridium difficile is a major cause of nosocomial infections. Bacterial persistence in the gut is responsible for infection relapse; sporulation and other unidentified mechanisms contribute to this process. Intestinal bile salts cholate and deoxycholate stimulate spore germination, while deoxycholate kills vegetative cells. Here, we report that sub-lethal concentrations of deoxycholate stimulate biofilm formation, which protects C. difficile from antimicrobial compounds. The biofilm matrix is composed of extracellular DNA and proteinaceous factors that promote biofilm stability. Transcriptomic analysis indicates that deoxycholate induces metabolic pathways and cell envelope reorganization, and represses toxin and spore production. In support of the transcriptomic analysis, we show that global metabolic regulators and an uncharacterized lipoprotein contribute to deoxycholateinduced biofilm formation. Finally, Clostridium scindens enhances biofilm formation of C. difficile by converting cholate into deoxycholate. Together, our results suggest that deoxycholate is an intestinal signal that induces C. difficile persistence and may increase the risk of relapse.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
Université de Lille
CNRS
INRA
ENSCL
CNRS
INRA
ENSCL
Collections :
Équipe(s) de recherche :
Processus aux Interfaces et Hygiène des Matériaux (PIHM)
Date de dépôt :
2021-01-20T11:33:55Z
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