Akkermansia muciniphila exacerbates food allergy in fibre-deprived mice

Amy Parrish, Marie Boudaud, Erica T. Grant, Stéphanie Willieme, Mareike Neumann, Mathis Wolter, Sophie Z. Craig, Alessandro De Sciscio, Antonio Cosma, Oliver Hunewald, Markus Ollert, Mahesh S. Desai*

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review


Alterations in the gut microbiome, including diet-driven changes, are linked to the rising prevalence of food allergy. However, little is known about how specific gut bacteria trigger the breakdown of oral tolerance. Here we show that depriving specific-pathogen-free mice of dietary fibre leads to a gut microbiota signature with increases in the mucin-degrading bacterium Akkermansia muciniphila. This signature is associated with intestinal barrier dysfunction, increased expression of type 1 and 2 cytokines and IgE-coated commensals in the colon, which result in an exacerbated allergic reaction to food allergens, ovalbumin and peanut. To demonstrate the causal role of A. muciniphila, we employed a tractable synthetic human gut microbiota in gnotobiotic mice. The presence of A. muciniphila within the microbiota, combined with fibre deprivation, resulted in stronger anti-commensal IgE coating and innate type-2 immune responses, which worsened symptoms of food allergy. Our study provides important insights into how gut microbes can regulate immune pathways of food allergy in a diet-dependent manner.

Original languageEnglish
JournalNature Microbiology
Early online date11 Sept 2023
Publication statusE-pub ahead of print - 11 Sept 2023


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