Cited by 65Endoplasmic Reticulum Stress and DiseaseGut microbiota and healthInflammatory Bowel Disease

The epithelial-specific ER stress sensor ERN2/IRE1β enables host-microbiota crosstalk to affect colon goblet cell development

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Grey, Michael J., De Luca, Heidi, Ward, Doyle V., Kreulen, Irini A.M., Bugda Gwilt, Katlynn, Foley, Sage E., Thiagarajah, Jay R., McCormick, Beth A. +2 more·2022·Journal of Clinical Investigation

Abstract

Epithelial cells lining mucosal surfaces of the gastrointestinal and respiratory tracts uniquely express ERN2/IRE1β, a paralogue of the most evolutionarily conserved endoplasmic reticulum stress sensor, ERN1/IRE1α. How ERN2 functions at the host-environment interface and why a second paralogue evolved remain incompletely understood. Using conventionally raised and germ-free Ern2-/- mice, we found that ERN2 was required for microbiota-induced goblet cell maturation and mucus barrier assembly in the colon. This occurred only after colonization of the alimentary tract with normal gut microflora, which induced Ern2 expression. ERN2 acted by splicing Xbp1 mRNA to expand ER function and prevent ER stress in goblet cells. Although ERN1 can also splice Xbp1 mRNA, it did not act redundantly to ERN2 in this context. By regulating assembly of the colon mucus layer, ERN2 further shaped the composition of the gut microbiota. Mice lacking Ern2 had a dysbiotic microbial community that failed to induce goblet cell development and increased susceptibility to colitis when transferred into germ-free WT mice. These results show that ERN2 evolved at mucosal surfaces to mediate crosstalk between gut microbes and the colonic epithelium required for normal homeostasis and host defense.

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  • The beneficial effects of butyrate supplementation on PD pathologies might be attributed to its potent HDAC inhibitory activity and its ability to promote intestinal barrier and BBB integrity.

    “The beneficial effects of butyrate supplementation on PD pathologies might be attributed to its potent HDAC inhibitory activity and its ability to promote intestinal barrier and BBB integrity.336–339”
  • An intact gut microbiota contributes to goblet cell maturation and mucus barrier assembly by activating ERN2 and XBP1.

    “An intact gut microbiota contributes to goblet cell maturation and mucus barrier assembly by activating the epithelial cell-specific ER stress sensor ERN2 and its downstream transcription factor X-box binding protein 1 (XBP1).”

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Authors
Grey, M. J., De Luca, H., Ward, D. V., Kreulen, I. A. M., Bugda Gwilt, K., Foley, S. E., Thiagarajah, J. R., McCormick, B. A., Turner, J. R., & Lencer, W. I.
Affiliations
  • Boston Children's Hospital (US)
  • University of Massachusetts Chan Medical School (US)
  • Brigham and Women's Hospital (US)
Corresponding author
  • Grey, Michael J.
  • Lencer, Wayne I.
Venue
Journal of Clinical Investigation
Published
2022-09-01
Volume
132
Issue
17
ISSN
  • 0021-9738 (ISSN-L)
  • 1558-8238
OpenAlex
W4283205946
Cited by
65
References
67
Citations by year
2026: 9 · 2025: 22 · 2024: 20 · 2023: 10 · 2022: 4
FWCI
7.48
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
National Institute of Diabetes and Digestive and Kidney Diseases (K01DK119414, R01DK048106, R01DK125407, R01DK061931, P30DK034854)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Endoplasmic Reticulum Stress and Disease
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Inflammatory Bowel Disease
Keywords
endoplasmic reticulum stress, XBP1 splicing, goblet cell differentiation, mucus barrier, gut microbiota, host-microbiota crosstalk, colitis, germ-free mice, mucosal epithelium, gut dysbiosis
MeSH terms
Animals, Colon, Endoribonucleases, Intestinal Mucosa, Membrane Proteins, RNA, Messenger, Protein Serine-Threonine Kinases, Goblet Cells, Mice, Microbiota

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