Gut bacteria from multiple sclerosis patients modulate human T cells and exacerbate symptoms in mouse models

Egle Cekanaviciute, Bryan B. Yoo, Tessel F. Runia, Justine W. Debelius, Sneha Singh, Charlotte A. Nelson, Rachel Kanner, Yadira Bencosme, Yun Kyung Lee, Stephen L. Hauser, Elizabeth Crabtree-Hartman, Ilana Katz Sand, Mar Gacias, Yungjiao Zhu, Patrizia Casaccia, Bruce A.C. Cree, Rob Knight, Sarkis K. Mazmanian, Sergio E. Baranzini

Research output: Contribution to journalArticlepeer-review

605 Scopus citations


The gut microbiota regulates T cell functions throughout the body. We hypothesized that intestinal bacteria impact the pathogenesis of multiple sclerosis (MS), an autoimmune disorder of the CNS and thus analyzed the microbiomes of 71 MS patients not undergoing treatment and 71 healthy controls. Although no major shifts in microbial community structure were found, we identified specific bacterial taxa that were significantly associated with MS. Akkermansia muciniphila and Acinetobacter calcoaceticus, both increased in MS patients, induced proinflammatory responses in human peripheral blood mononuclear cells and in monocolonized mice. In contrast, Parabacteroides distasonis, which was reduced in MS patients, stimulated antiinflammatory IL-10–expressing human CD4+CD25+ T cells and IL-10+FoxP3+ Tregs in mice. Finally, microbiota transplants from MS patients into germ-free mice resulted in more severe symptoms of experimental autoimmune encephalomyelitis and reduced proportions of IL-10+ Tregs compared with mice “humanized” with microbiota from healthy controls. This study identifies specific human gut bacteria that regulate adaptive autoimmune responses, suggesting therapeutic targeting of the microbiota as a treatment for MS.

Original languageEnglish
Pages (from-to)10713-10718
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number40
StatePublished - 3 Oct 2017
Externally publishedYes


  • Autoimmunity
  • Microbiome
  • Multiple sclerosis


Dive into the research topics of 'Gut bacteria from multiple sclerosis patients modulate human T cells and exacerbate symptoms in mouse models'. Together they form a unique fingerprint.

Cite this