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Journal Articles Cell Host & Microbe Year : 2022

The gut environment regulates bacterial gene expression which modulates susceptibility to bacteriophage infection

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Abstract

Abundance and diversity of bacteria and their viral predators, bacteriophages (phages), in the digestive tract are associated with human health. Particularly intriguing is the long-term coexistence of these two antagonistic populations. We performed genome-wide RNA sequencing on a human enteroaggregative Escherichia coli isolate to identify genes differentially expressed between in vitro conditions and in murine intestines. We experimentally demonstrated that four of these differentially expressed genes modified the interactions between E. coli and three virulent phages by either increasing or decreasing its susceptibility/resistance pattern and also by interfering with biofilm formation. Therefore, the regulation of bacterial genes expression during the colonization of the digestive tract influences the coexistence of phages and bacteria, highlighting the intricacy of tripartite relationships between phages, bacteria, and the animal host in intestinal homeostasis.
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pasteur-03644228 , version 1 (19-04-2022)

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Marta Lourenço, Lorenzo Chaffringeon, Quentin Lamy-Besnier, Marie Titécat, Thierry Pédron, et al.. The gut environment regulates bacterial gene expression which modulates susceptibility to bacteriophage infection. Cell Host & Microbe, 2022, 30 (4), pp.556-569.e5. ⟨10.1016/j.chom.2022.03.014⟩. ⟨pasteur-03644228⟩
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