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Title: Membrane vesicles from the probiotic Nissle 1917 and gut resident Escherichia coli strains distinctly modulate human dendritic cells and subsequent T cell responses
Author: Díaz Garrido, Natalia
Fábrega Fernández, María José
Vera-García, Rodrigo
Giménez Claudio, Rosa
Badía Palacín, Josefa
Baldomà Llavinés, Laura
Keywords: Escheríchia coli
Microbiota intestinal
Cèl·lules dendrítiques
Tracte gastrointestinal
Escherichia coli
Gastrointestinal microbiome
Dendritic cells
Gastrointestinal system
Issue Date: 10-Aug-2019
Publisher: Elsevier
Abstract: Extracellular membrane vesicles (MVs) released by gut microbiota are key players in the communication with the host. The aim of this study was to evaluate the immunomodulatory properties of MVs from the probiotic E. coli Nissle 1917 (EcN) in terms of DC-derived adaptive immune responses and to compare the effects with those elicited by commensal E. coli. The effects of MVs were analysed in monocyte-derived DCs by measuring cytokine expression and the ability of activated-DCs to differentiate CD4+ T cells towards specific effector subsets. EcN MVs derived intricate Th1/Th2/Th17/Th22/Treg responses consistent with the beneficial effects of this probiotic. Th2/Th17/Th22 responses were common to commensal E. coli-derived vesicles but specific differences were observed for Th1 and Treg responses. Since MVs activate DCs in a strain-specific manner, probiotic-derived MVs could be explored as a safe (bacteria-free) strategy to develop new functional food ingredients targeting gut microbiota balance or intestinal inflammation.
Note: Versió postprint del document publicat a:
It is part of: Journal of Functional Foods, 2019, vol. 61, p. 103495
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ISSN: 1756-4646
Appears in Collections:Articles publicats en revistes (Bioquímica i Fisiologia)

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