Cited by 76Autophagy in Disease and TherapyBarrier Structure and Function StudiesGastrointestinal motility and disorders

Inhibition of autophagic degradation process contributes to claudin-2 expression increase and epithelial tight junction dysfunction in TNF-α treated cell monolayers

Open access
Zhang, Cong, Yan, Junkai, Xiao, Yongtao, Shen, Yujie, Wang, Jiazheng, Ge, Wensong, Chen, Yingwei·2017·International Journal of Molecular Sciences

Abstract

Tight junction dysfunction plays a vital role in some chronic inflammatory diseases. Pro-inflammatory cytokines, especially tumor necrosis factor alpha (TNF-α), act as important factors in intestinal epithelial tight junction dysfunction during inflammatory conditions. Autophagy has also been shown to be crucial in tight junction function and claudin-2 expression, but whether autophagy has an effect on the change of claudin-2 expression and tight junction function induced by TNF-α is still unknown. To answer this question, we examined the expression of claudin-2 protein, transepithelial electrical resistance (TER), and permeability of cell monolayers, autophagy flux change, and lysosomal pH after TNF-α with or without PP242 treatment. Our study showed that claudin-2 expression, intestinal permeability, microtubule-associated protein 1 light chain 3B II (LC3B-II) and sequestosome 1 (P62) expression largely increased while TER values decreased in TNF-α treated cell monolayers. Further research using 3-methyladenine (3-MA), bafilomycin A1, and ad-mCherry-GFP-LC3B adenovirus demonstrated that LC3B-II increase induced by TNF-α was attributed to the inhibition of autophagic degradation. Moreover, both qualitative and quantitative method confirmed the increase of lysosomal pH, and mammalian target of rapamycin (mTOR) inhibitor PP242 treatment relieved this elevation. Moreover, PP242 treatment also alleviated the change of autophagy flux, TER, and claudin-2 expression induced by TNF-α. Therefore, we conclude that increase of claudin-2 levels and intestinal epithelial tight junction dysfunction are partly caused by the inhibition of autophagic degradation in TNF-α treated cell monolayers.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.3390/ijms18010157

Cites

45 of 45 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Zhang, C., Yan, J., Xiao, Y., Shen, Y., Wang, J., Ge, W., & Chen, Y.
Affiliations
  • Shanghai Jiao Tong University (CN)
  • Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai Institute for Pediatric Research, Shanghai 200092, China
Corresponding author
  • Ge, Wensong
  • Chen, Yingwei
Venue
International Journal of Molecular Sciences
Publisher
MDPI AG
Published
2017-01-17
Volume
18
Issue
1
Pages
157
ISSN
1422-0067 (ISSN-L)
OpenAlex
W2573778349
Cited by
76
References
45
Citations by year
2026: 8 · 2025: 8 · 2024: 11 · 2023: 16 · 2022: 3 · 2021: 9 · 2020: 4 · 2019: 10 · 2018: 5 · 2017: 2
FWCI
4.50
Type
journal article
Language
en
Open access
Locations
  • International Journal of Molecular Sciences (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Natural Science Foundation of China (81370485)
Topics
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
Keywords
autophagy, claudin-2, tight junction dysfunction, TNF-α, intestinal permeability, transepithelial electrical resistance, PP242, mTOR inhibition, lysosomal pH, LC3B, p62, intestinal epithelial barrier, inflammation
MeSH terms
Sequestosome-1 Protein, Adenine, Animals, Autophagy, Cell Line, Epithelial Cells, Humans, Hydrogen-Ion Concentration, Indoles, Lysosomes, Microtubule-Associated Proteins, Purines, Tumor Necrosis Factor-alpha, Blotting, Western, Microscopy, Confocal, Caco-2 Cells, Macrolides, Tight Junctions, Rats, Claudin-2

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review