Cited by 367Multiple Sclerosis Research StudiesT-cell and B-cell ImmunologyGut microbiota and health

Central Nervous System Demyelinating Disease Protection by the Human Commensal Bacteroides fragilis Depends on Polysaccharide A Expression

Ochoa-Repáraz, Javier, Mielcarz, Daniel W, Ditrio, Lauren E, Burroughs, Ashley R, Begum-Haque, Sakhina, Dasgupta, Suryasarathi, Kasper, Dennis L, Kasper, Lloyd H·2010·The Journal of Immunology

Abstract

The importance of gut commensal bacteria in maintaining immune homeostasis is increasingly understood. We recently described that alteration of the gut microflora can affect a population of Foxp3(+)T(reg) cells that regulate demyelination in experimental autoimmune encephalomyelitis (EAE), the experimental model of human multiple sclerosis. We now extend our previous observations on the role of commensal bacteria in CNS demyelination, and we demonstrate that Bacteroides fragilis producing a bacterial capsular polysaccharide Ag can protect against EAE. Recolonization with wild type B. fragilis maintained resistance to EAE, whereas reconstitution with polysaccharide A-deficient B. fragilis restored EAE susceptibility. Enhanced numbers of Foxp3(+)T(reg) cells in the cervical lymph nodes were observed after intestinal recolonization with either strain of B. fragilis. Ex vivo, CD4(+)T cells obtained from mice reconstituted with wild type B. fragilis had significantly enhanced rates of conversion into IL-10-producing Foxp3(+)T(reg) cells and offered greater protection against disease. Our results suggest an important role for commensal bacterial Ags, in particular B. fragilis expressing polysaccharide A, in protecting against CNS demyelination in EAE and perhaps human multiple sclerosis.

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Crossref · 10.4049/jimmunol.1001443

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31 of 31 references verified0 citation errors · 0 not checkable

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  • Up-regulation of ENTPD1 has been implicated in the protective effect of PSA in experimental autoimmune encephalomyelitis.

    “the up-regulation of ENTPD1 has been implicated in the protective effect of PSA in experimental autoimmune encephalomyelitis (EAE), a mouse model of multiple sclerosis (Ochoa-Reparaz et al., 2010; Y. Wang et al., 2014).”
  • B. fragilis and Clostridial consortium correct symptoms of intestinal disease and multiple sclerosis in animal models.

    “By this mechanism, B. fragilis and Clostridial consortium sufficiently correct symptoms of intestinal disease and multiple sclerosis in animal models (74, 75) and continue to be tested for clinical translation into patient populations.”
  • The altered microbiota of patients could transfer the disease from a human host to a mouse host.

    “Of extreme relevance, the altered microbiota of patients could transfer the disease from a human host to a mouse host (113, 116–120).”
  • Mice treated with antibiotics alone or recolonized with the PSA-wild-type strain of B. fragilis were protected against experimental autoimmune encephalomyelitis, whereas mice recolonized with ΔPSA B. fragilis and vehicle-treated controls developed the disease.

    “Mice treated with antibiotics alone or recolonized with the PSA-wild-type strain of B. fragilis were protected against disease, whereas the mice recolonized with ΔPSA B. fragilis and as well the vehicle-treated control group developed the disease (116).”

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Authors
Ochoa-Repáraz, J., Mielcarz, D. W., Ditrio, L. E., Burroughs, A. R., Begum-Haque, S., Dasgupta, S., Kasper, D. L., & Kasper, L. H.
Affiliations
  • Section of Neurology, Department of Medicine , Lebanon, NH 03756
  • Department of Microbiology and Immunology, Dartmouth Medical School , Lebanon, NH 03756
  • Brigham and Women's Hospital (US)
Venue
The Journal of Immunology
Published
2010-10-01
Volume
185
Issue
7
Pages
4101-4108
ISSN
  • 0022-1767 (ISSN-L)
  • 1550-6606
OpenAlex
W2118649010
Cited by
367
References
31
Citations by year
2026: 9 · 2025: 16 · 2024: 18 · 2023: 23 · 2022: 24 · 2021: 30 · 2020: 27 · 2019: 24 · 2018: 37 · 2017: 34 · 2016: 31 · 2015: 21 · 2014: 22 · 2013: 18 · 2012: 16
FWCI
11.07
Type
journal article
Language
en
Open access
closed
Locations
  • The Journal of Immunology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Dartmouth College
  • U.S. Public Health Service
Topics
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Multiple Sclerosis Research Studies
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
Keywords
Bacteroides fragilis, polysaccharide A, experimental autoimmune encephalomyelitis, multiple sclerosis, central nervous system demyelination, gut commensal bacteria, Foxp3+ regulatory T cells, IL-10, immune tolerance, gut microbiota
MeSH terms
Animals, Antigens, Bacterial, Bacteroides fragilis, Cell Separation, Encephalomyelitis, Autoimmune, Experimental, Enzyme-Linked Immunosorbent Assay, Female, Flow Cytometry, Humans, Intestinal Mucosa, Bacterial Capsules, Reverse Transcriptase Polymerase Chain Reaction, Mice

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