Cited by 721Gut microbiota and healthT-cell and B-cell ImmunologyGastrointestinal motility and disorders

Aberrant expansion of segmented filamentous bacteria in IgA-deficient gut

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Suzuki, Keiichiro, Meek, Bob, Doi, Yasuko, Muramatsu, Masamichi, Chiba, Tsutomu, Honjo, Tasuku, Fagarasan, Sidonia·2004·Proceedings of the National Academy of Sciences

Abstract

The mechanism to maintain homeostasis of the gut microbiota remains largely unknown despite its critical role in the body defense. In the intestines of mice with deficiency of activation-induced cytidine deaminase (AID), the absence of hypermutated IgA is partially compensated for by the presence of large amounts of unmutated IgM and normal expression levels of defensins and angiogenins. We show here a predominant and persistent expansion of segmented filamentous bacteria throughout the small intestine of AID –/– mice. Reconstitution of lamina propria IgA production in AID –/– mice recovered the normal composition of gut flora and abolished the local and systemic activation of the immune system. The results indicate that secretions of IgAs rather than innate defense peptides are critical to regulation of commensal bacterial flora and that the segmented filamentous bacteria antigens are strong stimuli of the mucosal immune system.

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Crossref · 10.1073/pnas.0307317101

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  • Defective IgA secretion or function induces microbial dysbiosis.

    “In turn, defective IgA secretion or function induces microbial dysbiosis [46, 47].”

    From Gut microbiota-mediated immunomodulation in tumor (2021) · cites this paper as [47]

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Cited by

Sorted by citations

Authors
Suzuki, K., Meek, B., Doi, Y., Muramatsu, M., Chiba, T., Honjo, T., & Fagarasan, S.
Affiliations
Kyoto University (JP)
Venue
Proceedings of the National Academy of Sciences
Published
2004-02-06
Volume
101
Issue
7
Pages
1981-1986
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2065174433
Cited by
721
References
25
Citations by year
2026: 15 · 2025: 28 · 2024: 31 · 2023: 29 · 2022: 26 · 2021: 37 · 2020: 35 · 2019: 46 · 2018: 37 · 2017: 37 · 2016: 41 · 2015: 49 · 2014: 63 · 2013: 41 · 2012: 36
FWCI
5.46
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Kyoto University Research Information Repository (Kyoto University) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
Keywords
segmented filamentous bacteria, IgA deficiency, activation-induced cytidine deaminase, gut microbiota homeostasis, defensins, angiogenin, mucosal immunity, commensal bacteria, small intestine
MeSH terms
AICDA (Activation-Induced Cytidine Deaminase), Anaerobiosis, Anastomosis, Surgical, Animals, Bacteria, Cytidine Deaminase, DNA-Binding Proteins, Immunoglobulin A, Immunity, Innate, Intestine, Small, Mice, Inbred C57BL, Phenotype, Gene Deletion, Mice, Knockout, Immunity, Mucosal, Mice

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