Cited by 82Inflammatory Bowel DiseaseGastrointestinal motility and disordersBarrier Structure and Function Studies

Zonulin transgenic mice show altered gut permeability and increased morbidity/mortality in the DSS colitis model

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Sturgeon, Craig, Lan, Jinggang, Fasano, Alessio·2017·Annals of the New York Academy of Sciences

Abstract

Increased small intestinal permeability (IP) has been proposed to be an integral element, along with genetic makeup and environmental triggers, in the pathogenies of chronic inflammatory diseases (CIDs). We identified zonulin as a master regular of intercellular tight junctions linked to the development of several CIDs. We aim to study the role of zonulin‐mediated IP in the pathogenesis of CIDs. Zonulin transgenic Hp2 mice (Ztm) were subjected to dextran sodium sulfate (DSS) treatment for 7 days, followed by 4–7 days' recovery and compared to C57Bl/6 (wild‐type (WT)) mice. IP was measured in vivo and ex vivo, and weight, histology, and survival were monitored. To mechanistically link zonulin‐dependent impairment of small intestinal barrier function with clinical outcome, Ztm were treated with the zonulin inhibitor AT1001 added to drinking water in addition to DSS. We observed increased morbidity (more pronounced weight loss and colitis) and mortality (40–70% compared with 0% in WT) at 11 days post‐DSS treatment in Ztm compared with WT mice. Both in vivo and ex vivo measurements showed an increased IP at baseline in Ztm compared to WT mice, which was exacerbated by DSS treatment and was associated with upregulation of zonulin gene expression (fourfold in the duodenum, sixfold in the jejunum). Treatment with AT1001 prevented the DSS‐induced increased IP both in vivo and ex vivo without changing zonulin gene expression and completely reverted morbidity and mortality in Ztm. Our data show that zonulin‐dependent small intestinal barrier impairment is an early step leading to the break of tolerance with subsequent development of CIDs.

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  • Increased zonulin levels are considered to be a marker of impaired intestinal barrier.

    “Zonulin is the only measurable blood protein that reflects intestinal permeability, and increased zonulin levels are considered to be a marker of impaired intestinal barrier [269].”
  • Zonulin is the only measurable blood protein that reflects intestinal permeability.

    “Zonulin is the only measurable blood protein that reflects intestinal permeability, and increased zonulin levels are considered to be a marker of impaired intestinal barrier [269].”
  • Increased intestinal permeability has been found in several conditions including exposure to HFD, specific microbiota, gliadin, allergens, or hyperglycemia.

    “Increased intestinal permeability has been found in several conditions including exposure to HFD, specific microbiota, gliadin, allergens or even hyperglycemia [227,269].”
  • Zonulin is essential for the regulation of intestinal permeability.

    “Zonulin, the only physiological modulator of tight junctions described to date, was discovered as the precursor of haptoglobin-2 (pre-Hp2) [266] and is essential for the regulation of intestinal permeability [267,268,269] (Figure 3).”

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Authors
Sturgeon, C., Lan, J., & Fasano, A.
Affiliations
  • University of Maryland, Baltimore (US)
  • Massachusetts General Hospital (US)
Corresponding author
Fasano, Alessio
Venue
Annals of the New York Academy of Sciences
Publisher
Wiley
Published
2017-04-19
Volume
1397
Issue
1
Pages
130-142
ISSN
  • 0077-8923 (ISSN-L)
  • 1749-6632
OpenAlex
W2606737487
Cited by
82
References
59
Citations by year
2026: 2 · 2025: 8 · 2024: 14 · 2023: 9 · 2022: 15 · 2021: 9 · 2020: 15 · 2019: 7 · 2018: 2 · 2017: 1
FWCI
4.53
Type
journal article
Language
en
Open access
Locations
  • Annals of the New York Academy of Sciences (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Diabetes and Digestive and Kidney Diseases (DK048373)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Inflammatory Bowel Disease
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
Keywords
zonulin, small intestinal permeability, tight junctions, DSS-induced colitis, intestinal barrier dysfunction, chronic inflammatory diseases
MeSH terms
Animals, Body Weight, Cholera Toxin, Colitis, Female, Haptoglobins, Intestinal Mucosa, Intestine, Small, Male, Mice, Inbred C57BL, Mice, Transgenic, Oligopeptides, Permeability, Protein Precursors, Time Factors, Dextran Sulfate, Kaplan-Meier Estimate

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