Modulation of the immune response by probiotic strains in a mouse model of gluten sensitivity |
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Authors: | Rossana D Arienzo, Francesco Maurano, Paola Lavermicocca, Ezio Ricca,Mauro Rossi |
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Affiliation: | aInstitute of Food Sciences, CNR, Avellino, Italy;bInstitute of Sciences of Food Production, CNR, Bari, Italy;cDepartment of Structural and Functional Biology, University Federico II, Naples, Italy |
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Abstract: | Probiotic strains play an important role in modulating activities in the gut-associated lymphoid tissue. Elucidation of the mechanisms that mediate probiotic-driven immunomodulation may facilitate their therapeutic application for specific immune-mediated diseases or for prophylaxis. In this study, we explored the effect of different Lactobacillus spp. and Bifidobacterium lactis in transgenic mice expressing the human DQ8 heterodimer, a HLA molecule linked to Celiac Disease (CD). In vitro analysis on immature bone marrow-derived dendritic cells (iBMDCs) showed that all strains up-regulated surface B7-2 (CD86), indicative of DC maturation, however, with different intensity. No strain induced appreciable levels of IL-10 or IL-12 in iBMDCs, whereas TNF-α expression was essentially elicited by Lactobacillus paracasei and Lactobacillus fermentum. Interestingly, these strains were found also to increase the antigen-specific TNF-α secretion in vivo, following co-administration of probiotic bacteria in mice mucosally immunized with the gluten component gliadin. Together these findings highlighted the ability of probiotics to exert strain-specific inductive rather than suppressive effects both on the innate and adaptive immunity in a mouse model of food antigen sensitivity. |
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Keywords: | Probiotics Intestinal mucosa Transgenic mice |
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