Dietary protein increases T-cell-independent sIgA production through changes in gut microbiota-derived extracellular vesicles.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
27 07 2022
27 07 2022
Historique:
received:
12
08
2020
accepted:
30
06
2022
entrez:
27
7
2022
pubmed:
28
7
2022
medline:
30
7
2022
Statut:
epublish
Résumé
Secretory IgA is a key mucosal component ensuring host-microbiota mutualism. Here we use nutritional geometry modelling in mice fed 10 different macronutrient-defined, isocaloric diets, and identify dietary protein as the major driver of secretory IgA production. Protein-driven secretory IgA induction is not mediated by T-cell-dependent pathways or changes in gut microbiota composition. Instead, the microbiota of high protein fed mice produces significantly higher quantities of extracellular vesicles, compared to those of mice fed high-carbohydrate or high-fat diets. These extracellular vesicles activate Toll-like receptor 4 to increase the epithelial expression of IgA-inducing cytokine, APRIL, B cell chemokine, CCL28, and the IgA transporter, PIGR. We show that succinate, produced in high concentrations by microbiota of high protein fed animals, increases generation of reactive oxygen species by bacteria, which in turn promotes extracellular vesicles production. Here we establish a link between dietary macronutrient composition, gut microbial extracellular vesicles release and host secretory IgA response.
Identifiants
pubmed: 35896537
doi: 10.1038/s41467-022-31761-y
pii: 10.1038/s41467-022-31761-y
pmc: PMC9329401
doi:
Substances chimiques
Dietary Proteins
0
Immunoglobulin A, Secretory
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
4336Informations de copyright
© 2022. Crown.
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