09/12-2019 - Benoit Chassaing : We are what we eat: modern stressors of the host-microbiota relationship

08 - Novembre - 2019


Bâtiment Kourilsky - 13h–14h

Salle des Conférences (Rez de Chaussée),

184 rue du Faubourg Saint-Antoine, Paris



We are what we eat: modern stressors of the host-microbiota relationship

Benoit Chassaing

Team leader INSERM U1016 Paris

Invité par Nathalie ROLHION (nathalie.rolhion@inserm.fr)


The intestinal tract is inhabited by a large and diverse community of microbes collectively referred to as the gut microbiota. While the gut microbiota provides important benefits to its host, its disturbance is associated with chronic inflammatory diseases. For example, we previously reported that, in mice, consumption of relatively low concentrations of two commonly used emulsifiers, detergent-like molecules and ubiquitous component of processed foods, induced chronic colitis in susceptible host and low-grade inflammation and obesity/ metabolic syndrome in wild-type hosts. Emulsifier-induced effects was associated with microbiota encroachment, altered species composition and increased pro-inflammatory potential. Follow-up mechanistic studies demonstrated that the intestinal microbiota is the direct target of such additives, and importantly revealed that not all the microbiotas are impacted in the same way by such disturbance, supporting the concept that some individuals might be at higher risk of host–microbiota perturbations. Our current work is revealing important inter-individual variations in microbiota composition and function, opening new therapeutic avenues to treat and prevent chronic inflammatory disorders.

Centre de Recherche
UMR_S 938

Hôpital St-Antoine


Tél : +(33) 1 49 28 46 00