Cited by 94Polyamine Metabolism and ApplicationsBarrier Structure and Function StudiesCell Adhesion Molecules Research

Polyamines regulate E-cadherin transcription through c-Myc modulating intestinal epithelial barrier function

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Liu, Lan, Guo, Xin, Rao, Jaladanki N., Zou, Tongtong, Xiao, Lan, Yu, Tingxi, Timmons, Jennifer A., Turner, Douglas J. +1 more·2009·American Journal of Physiology-Cell Physiology

Abstract

The integrity of the intestinal epithelial barrier depends on intercellular junctions that are highly regulated by numerous extracellular and intracellular factors. E-cadherin is found primarily at the adherens junctions in the intestinal mucosa and mediates strong cell-cell contacts that have a functional role in forming and regulating the epithelial barrier. Polyamines are necessary for E-cadherin expression, but the exact mechanism underlying polyamines remains elusive. The current study was performed to determine whether polyamines induce E-cadherin expression through the transcription factor c-Myc and whether polyamine-regulated E-cadherin plays a role in maintenance of the epithelial barrier integrity. Decreasing cellular polyamines reduced c-Myc and repressed E-cadherin transcription as indicated by a decrease in levels of E-cadherin promoter activity and its mRNA. Forced expression of the c-myc gene by infection with adenoviral vector containing c-Myc cDNA stimulated E-cadherin promoter activity and increased E-cadherin mRNA and protein levels in polyamine-deficient cells. Experiments using different E-cadherin promoter mutants revealed that induction of E-cadherin transcription by c-Myc was mediated through the E-Pal box located at the proximal region of the E-cadherin promoter. Decreased levels of E-cadherin in polyamine-deficient cells marginally increased basal levels of paracellular permeability but, remarkably, potentiated H(2)O(2)-induced epithelial barrier dysfunction. E-cadherin silencing by transfection with its specific small interfering RNA also increased vulnerability of the epithelial barrier to H(2)O(2). These results indicate that polyamines enhance E-cadherin transcription by activating c-Myc, thus promoting function of the epithelial barrier.

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Crossref · 10.1152/ajpcell.00620.2008

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  • Polyamines enhance gut barrier integrity through inducing E-cadherin, the cell-cell adhesion protein, in a c-Myc-dependent manner.

    “Polyamines enhance gut barrier integrity through inducing E-cadherin, the cell-cell adhesion protein in c-Myc–dependent manner.126”

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Authors
Liu, L., Guo, X., Rao, J. N., Zou, T., Xiao, L., Yu, T., Timmons, J. A., Turner, D. J., & Wang, J.-Y.
Affiliations
University of Maryland, Baltimore (US)
Venue
American Journal of Physiology-Cell Physiology
Published
2009-04
Volume
296
Issue
4
Pages
C801-C810
ISSN
  • 0363-6143 (ISSN-L)
  • 1522-1563
OpenAlex
W2149359487
Cited by
94
References
60
Citations by year
2026: 6 · 2025: 7 · 2024: 7 · 2023: 8 · 2022: 5 · 2021: 12 · 2020: 8 · 2019: 7 · 2018: 5 · 2017: 6 · 2016: 3 · 2015: 4 · 2013: 5 · 2012: 4
FWCI
1.47
Type
journal article
Language
en
Open access
Locations
  • American Journal of Physiology-Cell Physiology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Diabetes and Digestive and Kidney Diseases (T32DK067872, R01DK061972, (DK-57819, R01DK068491, DK-61972, R01DK057819, DK-68491)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Polyamine Metabolism and Applications
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
  • Health Sciences › Medicine › Immunology and Allergy › Cell Adhesion Molecules Research
Keywords
polyamines, E-cadherin, c-Myc, intestinal epithelial barrier, adherens junctions, E-cadherin promoter, paracellular permeability, transcriptional regulation, cell-cell adhesion
MeSH terms
Eflornithine, Animals, Cell Line, Enzyme Inhibitors, Epithelial Cells, Humans, Hydrogen Peroxide, Intercellular Junctions, Intestinal Mucosa, Mutation, Ornithine Decarboxylase, Permeability, Polyamines, Promoter Regions, Genetic, RNA, Messenger, Transcription, Genetic, Transfection, Antigens, CD, Cadherins, Proto-Oncogene Proteins c-myc, RNA Interference, RNA, Small Interfering, Rats, Ornithine Decarboxylase Inhibitors

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