CE15 - Immunologie, Infectiologie et Inflammation

Effect of exposure to oxygen and oxidative stress on Clostridioides difficile gut colonization and virulence – Difox

Submission summary

Enteric pathogens must integrate multiple environmental signals including differences in O2 tension and oxidative stress to successfully establish themselves within complex and diverse gut micro niches. Clostridium difficile (CD) appears to be a good model to decipher the impact of these environmental pressures on the colonization and infection processes of strict anaerobic bacteria. The main objectives of the Difox project are i) the identification of factors contributing to detoxification following oxidative stress and their role in conditions mimicking the steps of the infectious cycle of CD, ii) the in vivo study of the influence of intestinal microenvironments in colonization, localization of CD and host response by mainly neutrophilic studies iii) the role of adaptation to low O2 tension on physiology and virulence factor production and the identification of associated regulatory network(s).

Project coordinator

Madame Isabelle MARTIN-VERSTRAETE (Institut Pasteur)

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.


MICALIS Université Paris-Saclay
ARN Architecture et Réactivité de l'ARN
IP Institut Pasteur

Help of the ANR 544,339 euros
Beginning and duration of the scientific project: January 2023 - 48 Months

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