Cited by 5,029Gut microbiota and healthInflammatory Bowel DiseaseT-cell and B-cell Immunology

The gut microbiota shapes intestinal immune responses during health and disease

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Round, June L., Mazmanian, Sarkis K.·2009·Nature Reviews Immunology

Abstract

Immunological dysregulation is the cause of many non-infectious human diseases such as autoimmunity, allergy and cancer. The gastrointestinal tract is the primary site of interaction between the host immune system and microorganisms, both symbiotic and pathogenic. In this Review we discuss findings indicating that developmental aspects of the adaptive immune system are influenced by bacterial colonization of the gut. We also highlight the molecular pathways that mediate host-symbiont interactions that regulate proper immune function. Finally, we present recent evidence to support that disturbances in the bacterial microbiota result in dysregulation of adaptive immune cells, and this may underlie disorders such as inflammatory bowel disease. This raises the possibility that the mammalian immune system, which seems to be designed to control microorganisms, is in fact controlled by microorganisms.

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  • IBD mucosal injury is believed to result from complex interactions among gut microbiome, intestinal mucosa, and immune components.

    “which is believed to be caused by complex interactions between gut microbiome (including commensal and pathogenic microbes) (2), intestinal mucosa, and immune components (3).”
  • Intestinal microbiota may be an active participant in mucosal immune activation through stimulation of the immune system, likely in the subgroup of subjects showing increased epithelial permeability which could expose the immune system to an abnormal microbial antigenic load.

    “Intestinal microbiota may well be an active participant in this scenario through stimulation of the immune system,153 likely in the subgroup of subjects showing increased epithelial permeability which could154 expose the immune system to an abnormal microbial antigenic load.”
  • A mutually beneficial relationship between helpful symbionts and commensals is needed for health, and disturbing this balance causes dysbiosis and clinical disease.

    “A mutualistic relationship between beneficial symbionts and commensals is important for the maintenance of health and wellbeing; alterations in this balance leads to dysbiosis and ultimately clinical disease expression.1”
  • In the gut, greater microbial diversity is associated with protection from inflammation and inflammatory disease.

    “Studies suggest that in the gut, greater microbial diversity is associated with protection from inflammation and inflammatory disease[316,317]”
  • In the gut, the GM and its metabolites modulate gastrointestinal functions via effects on intestinal permeability, mucosal immune function, intestinal motility and sensitivity, and the ENS.

    “In the gut, the GM and its metabolites have been shown to modulate gastrointestinal functions via their effects on intestinal permeability (32–35), mucosal immune function (36–38), intestinal motility and sensitivity (39, 40), and the enteric nervous system (ENS) (21, 24, 25, 41).”

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Authors
Round, J. L., & Mazmanian, S. K.
Affiliations
California Institute of Technology (US)
Corresponding author
Mazmanian, Sarkis K.
Venue
Nature Reviews Immunology
Published
2009-05
Volume
9
Issue
5
Pages
313-323
ISSN
  • 1474-1733 (ISSN-L)
  • 1474-1741
OpenAlex
W2034082915
Cited by
5,029
References
118
Citations by year
2026: 205 · 2025: 284 · 2024: 333 · 2023: 300 · 2022: 401 · 2021: 423 · 2020: 398 · 2019: 390 · 2018: 395 · 2017: 382 · 2016: 345 · 2015: 262 · 2014: 221 · 2013: 223 · 2012: 177
FWCI
11.88
Type
journal article
Language
en
Update notices
erratum (2009-07-17)
Open access
Locations
  • Nature reviews. Immunology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • CaltechAUTHORS (California Institute of Technology) (submittedVersion)
Funders
National Institute of Diabetes and Digestive and Kidney Diseases (R01DK078938)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Inflammatory Bowel Disease
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
Keywords
gut microbiota, intestinal immune response, host-microbe interactions, bacterial colonization, inflammatory bowel disease, immune dysregulation, autoimmunity, allergy, cancer, symbiotic bacteria, pathogenic bacteria
MeSH terms
Animals, Disease, Health, Homeostasis, Humans, Intestines, Inflammatory Bowel Diseases, Immune System Phenomena

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