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Probiotic VSL #3‐induced TGF ‐β ameliorates food allergy inflammation in a mouse model of peanut sensitization through the induction of regulatory T cells in the gut mucosa
Author(s) -
Barletta Bianca,
Rossi Giacomo,
Schiavi Elisa,
Butteroni Cinzia,
Corinti Silvia,
Boirivant Monica,
Di Felice Gabriella
Publication year - 2013
Publication title -
molecular nutrition and food research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.495
H-Index - 131
eISSN - 1613-4133
pISSN - 1613-4125
DOI - 10.1002/mnfr.201300028
Subject(s) - food allergy , immunology , sensitization , medicine , probiotic , inflammation , allergy , immune system , peanut allergy , anaphylaxis , population , allergic inflammation , biology , environmental health , bacteria , genetics
Scope Among food allergies, peanut allergy is frequently associated with severe anaphylactic reactions. In the need for safe and effective therapeutic strategies, probiotics may be considered on the basis of their immunomodulatory properties. The aim of the present study was to investigate the immunological mediators involved in the effects of probiotic VSL #3 oral supplementation on T h2 inflammation and anaphylaxis in a mouse model of peanut allergy. Methods and results VSL #3 supplementation to peanut‐sensitized mice was effective in ameliorating anaphylaxis and T h2‐mediated inflammation, by promoting regulatory responses in the jejunum mucosa and in the mesenteric lymph node, as evaluated by ELISA , real‐time PCR , histologic, and immunohistochemical analysis. Probiotic‐induced TGF ‐β mediates its protective effects through the induction of regulatory T cells expressing FOXP 3 and/or latency‐associated peptide, as proven by in vivo blockade of TGF ‐β in VSL #3‐treated mice with a neutralizing monoclonal antibody one day before challenge. Conclusion TGF ‐β, induced in the gut by VSL #3 supplementation, is capable of reducing the T h2 inflammation associated with food anaphylaxis in a mouse model of peanut sensitization. TGF ‐β acts through the induction/maintenance of regulatory T cells expressing FOXP 3 and/or latency‐associated peptide. Probiotics supplementation may represent an effective and safe strategy for treating food allergies in adult population.