Cited by 414Immune Response and InflammationGut microbiota and healthT-cell and B-cell Immunology

Akkermansia muciniphila phospholipid induces homeostatic immune responses

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Bae, Munhyung, Cassilly, Chelsi D., Liu, Xiaoxi, Park, Sung-Moo, Tusi, Betsabeh Khoramian, Chen, Xiangjun, Kwon, Jaeyoung, Filipčík, Pavel +7 more·2022·Nature

Abstract

Abstract Multiple studies have established associations between human gut bacteria and host physiology, but determining the molecular mechanisms underlying these associations has been challenging 1–3 . Akkermansia muciniphila has been robustly associated with positive systemic effects on host metabolism, favourable outcomes to checkpoint blockade in cancer immunotherapy and homeostatic immunity 4–7 . Here we report the identification of a lipid from A. muciniphila ’s cell membrane that recapitulates the immunomodulatory activity of A. muciniphila in cell-based assays 8 . The isolated immunogen, a diacyl phosphatidylethanolamine with two branched chains (a15:0-i15:0 PE), was characterized through both spectroscopic analysis and chemical synthesis. The immunogenic activity of a15:0-i15:0 PE has a highly restricted structure–activity relationship, and its immune signalling requires an unexpected toll-like receptor TLR2–TLR1 heterodimer 9,10 . Certain features of the phospholipid’s activity are worth noting: it is significantly less potent than known natural and synthetic TLR2 agonists; it preferentially induces some inflammatory cytokines but not others; and, at low doses (1% of EC 50 ) it resets activation thresholds and responses for immune signalling. Identifying both the molecule and an equipotent synthetic analogue, its non-canonical TLR2–TLR1 signalling pathway, its immunomodulatory selectivity and its low-dose immunoregulatory effects provide a molecular mechanism for a model of A. muciniphila’ s ability to set immunological tone and its varied roles in health and disease.

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Authors
Bae, M., Cassilly, C. D., Liu, X., Park, S.-M., Tusi, B. K., Chen, X., Kwon, J., Filipčík, P., Bolze, A. S., Liu, Z., Vlamakis, H., Graham, D. B., Buhrlage, S. J., Xavier, R. J., & Clardy, J.
Affiliations
  • Gachon University (KR)
  • Harvard University (US)
  • Broad Institute (US)
Corresponding author
  • Xavier, Ramnik J.
  • Clardy, Jon
Venue
Nature
Published
2022-07-27
Volume
608
Issue
7921
Pages
168-173
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W4288052200
Cited by
413
References
52
Citations by year
2026: 72 · 2025: 126 · 2024: 102 · 2023: 95 · 2022: 18
FWCI
32.66
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (acceptedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
  • Massachusetts General Hospital
  • National Institutes of Health
  • National Institute of Allergy and Infectious Diseases (R01AI172147)
  • National Institute of Diabetes and Digestive and Kidney Diseases (RC2DK114784, P30DK043351, R01DK131742, R01DK127171)
  • National Center for Complementary and Integrative Health (F32AT010415, R01AT009708)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
  • 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
Keywords
Akkermansia muciniphila, immunomodulation, Toll-like receptor signaling, structure-activity relationship, gut microbiota, immune homeostasis, inflammatory cytokines, synthetic analogues
MeSH terms
Akkermansia, Cell Membrane, Homeostasis, Humans, Immunity, Phosphatidylethanolamines, Structure-Activity Relationship, Cytokines, Inflammation Mediators, Toll-Like Receptor 1, Toll-Like Receptor 2

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