Skip to Main content Skip to Navigation
Journal articles

Adaptation of the gut pathobiont Enterococcus faecalis to deoxycholate and taurocholate bile acids

Abstract : Enterococcus faecalis is a natural inhabitant of the human gastrointestinal tract. This bacterial species is subdominant in a healthy physiological state of the gut microbiota (eubiosis) in adults, but can become dominant and cause infections when the intestinal homeostasis is disrupted (dysbiosis). The relatively high concentrations of bile acids deoxycholate (DCA) and taurocholate (TCA) hallmark eubiosis and dysbiosis, respectively. This study aimed to better understand how E. faecalis adapts to DCA and TCA. We showed that DCA impairs E. faecalis growth and possibly imposes a continuous adjustment in the expression of many essential genes, including a majority of ribosomal proteins. This may account for slow growth and low levels of E. faecalis in the gut. In contrast, TCA had no detectable growth effect. The evolving transcriptome upon TCA adaptation showed the early activation of an oligopeptide permease system (opp2) followed by the adjustment of amino acid and nucleotide metabolisms. We provide evidence that TCA favors the exploitation of oligopeptide resources to fuel amino acid needs in limiting oligopeptide conditions. Altogether, our data suggest that the combined effects of decreased DCA and increased TCA concentrations can contribute to the rise of E. faecalis population during dysbiosis.
Document type :
Journal articles
Complete list of metadata

https://hal-pasteur.archives-ouvertes.fr/pasteur-03689605
Contributor : Sean Kennedy Connect in order to contact the contributor
Submitted on : Tuesday, June 7, 2022 - 1:57:15 PM
Last modification on : Friday, August 5, 2022 - 2:38:11 PM

File

Repoila_et_al-2022-Scientific_...
Publication funded by an institution

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Citation

F. Repoila, F. Le Bohec, C. Guérin, C. Lacoux, S. Tiwari, et al.. Adaptation of the gut pathobiont Enterococcus faecalis to deoxycholate and taurocholate bile acids. Scientific Reports, Nature Publishing Group, 2022, 12 (1), pp.8485. ⟨10.1038/s41598-022-12552-3⟩. ⟨pasteur-03689605⟩

Share

Metrics

Record views

58

Files downloads

5