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Commensal bacteria protect against food allergen sensitization

Proceedings of the National Academy of Sciences of the United States of America | 27 Aug 2014

AT Stefka, T Feehley, P Tripathi, J Qiu, K McCoy, SK Mazmanian, MY Tjota, GY Seo, S Cao, BR Theriault, DA Antonopoulos, L Zhou, EB Chang, YX Fu and CR Nagler
Abstract
Environmentally induced alterations in the commensal microbiota have been implicated in the increasing prevalence of food allergy. We show here that sensitization to a food allergen is increased in mice that have been treated with antibiotics or are devoid of a commensal microbiota. By selectively colonizing gnotobiotic mice, we demonstrate that the allergy-protective capacity is conferred by a Clostridia-containing microbiota. Microarray analysis of intestinal epithelial cells from gnotobiotic mice revealed a previously unidentified mechanism by which Clostridia regulate innate lymphoid cell function and intestinal epithelial permeability to protect against allergen sensitization. Our findings will inform the development of novel approaches to prevent or treat food allergy based on modulating the composition of the intestinal microbiota.
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Concepts
Commensalism, Archaea, Immune system, Epithelium, Food allergy, Allergy, Gut flora, Bacteria
MeSH headings
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