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Mucosal Immunol. 2017 Nov;10(6):1569-1580. doi: 10.1038/mi.2017.13. Epub 2017 Mar 15.

Lactobacillus johnsonii supplementation attenuates respiratory viral infection via metabolic reprogramming and immune cell modulation.

Author information

1
Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA.
2
Department of Medicine, University of California San Francisco, San Francisco, California, USA.
3
Henry Ford Health System, Detroit, Michigan, USA.
4
Department of Pediatrics, Augusta University, Augusta, Georgia, USA.

Abstract

Regulation of respiratory mucosal immunity by microbial-derived metabolites has been a proposed mechanism that may provide airway protection. Here we examine the effect of oral Lactobacillus johnsonii supplementation on metabolic and immune response dynamics during respiratory syncytial virus (RSV) infection. L. johnsonii supplementation reduced airway T helper type 2 cytokines and dendritic cell (DC) function, increased regulatory T cells, and was associated with a reprogrammed circulating metabolic environment, including docosahexanoic acid (DHA) enrichment. RSV-infected bone marrow-derived DCs (BMDCs) from L. johnsonii-supplemented mice had altered cytokine secretion, reduced expression of co-stimulatory molecules, and modified CD4+ T-cell cytokines. This was replicated upon co-incubation of wild-type BMDCs with either plasma from L. johnsonii-supplemented mice or DHA. Finally, airway transfer of BMDCs from L. johnsonii-supplemented mice or with wild-type derived BMDCs pretreated with plasma from L. johnsonii-supplemented mice reduced airway pathological responses to infection in recipient animals. Thus L. johnsonii supplementation mediates airway mucosal protection via immunomodulatory metabolites and altered immune function.

PMID:
28295020
PMCID:
PMC5599307
DOI:
10.1038/mi.2017.13
[Indexed for MEDLINE]
Free PMC Article

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