Cited by 80Chronic Kidney Disease and DiabetesTGF-β signaling in diseasesLiver physiology and pathology

The Notch γ-secretase inhibitor ameliorates kidney fibrosis via inhibition of TGF-β/Smad2/3 signaling pathway activation

Xiao, Zhicheng, Zhang, Jing, Peng, Xiaogang, Dong, Yanjun, Jia, Lixin, Li, Huihua, Du, Jie·2014·The International Journal of Biochemistry & Cell Biology

Abstract

Kidney fibrosis is a common feature of chronic kidney disease (CKD). A recent study suggests that abnormal Notch signaling activation contributes to the development of renal fibrosis. However, the molecular mechanism that regulates this process remains unexplored. Unilateral ureteral obstruction (UUO) or sham-operated C57BL6 mice (aged 10 weeks) were randomly assigned to receive dibenzazepine (DBZ, 250 μg/100g/d) or vehicle for 7 days. Histologic examinations were performed on the kidneys using Masson's trichrome staining and immunohistochemistry. Real-time PCR and western blot analysis were used for detection of mRNA expression and protein phosphorylation. The expression of Notch 1, 3, and 4, Notch intracellular domain (NICD), and its target genes Hes1 and HeyL were upregulated in UUO mice, while the increase in NICD protein was significantly attenuated by DBZ. After 7 days, the severity of renal fibrosis and expression of fibrotic markers, including collagen 1α1/3α1, fibronectin, and α-smooth muscle actin, were markedly increased in UUO compared with sham mice. In contrast, administration of DBZ markedly attenuated these effects. Furthermore, DBZ significantly inhibited UUO-induced expression of transforming growth factor (TGF)-β, phosphorylated Smad 2, and Smad 3. Mechanistically, Notch signaling activation in tubular epithelial cells enhanced fibroblast proliferation and activation in a coculture experiment. Our study provides evidence that Notch signaling is implicated in renal fibrogenesis. The Notch inhibitor DBZ can ameliorate this process via inhibition of the TGF-β/Smad2/3 signaling pathway, and might be a novel drug for preventing chronic kidney disease.

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Crossref · 10.1016/j.biocel.2014.08.009

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  • TGF-β is a Notch inhibitor upregulated during ageing and may explain the spontaneous entry of satellite cells into the cell cycle during ageing.

    “Furthermore, TGF‐β is a Notch inhibitor upregulated during ageing and may explain the spontaneous entry of satellite cells into the cell cycle during ageing.[ 45 ]”

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Authors
Xiao, Z., Zhang, J., Peng, X., Dong, Y., Jia, L., Li, H., & Du, J.
Affiliations
Capital Medical University (CN)
Corresponding author
Du, Jie
Venue
The International Journal of Biochemistry & Cell Biology
Publisher
Elsevier BV
Published
2014-10
Volume
55
Pages
65-71
ISSN
1357-2725 (ISSN-L)
OpenAlex
W2093292834
Cited by
80
References
38
Citations by year
2026: 3 · 2025: 6 · 2024: 5 · 2023: 7 · 2022: 3 · 2021: 6 · 2020: 7 · 2019: 8 · 2018: 9 · 2017: 14 · 2016: 9 · 2015: 3
FWCI
6.86
Type
journal article
Language
en
Open access
closed
Locations
  • The International Journal of Biochemistry & Cell Biology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Nephrology › Chronic Kidney Disease and Diabetes
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › TGF-β signaling in diseases
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
Keywords
renal fibrosis, Notch signaling, gamma-secretase inhibitors, dibenzazepine, TGF-β/Smad2/3 signaling, chronic kidney disease, unilateral ureteral obstruction, renal tubular epithelial cells, fibroblast activation, collagen deposition, Hes1, HEYL, Notch intracellular domain
MeSH terms
Animals, Cells, Cultured, Dibenzazepines, Fibrosis, Kidney, Kidney Diseases, Mice, Inbred C57BL, Random Allocation, Ureteral Obstruction, Blotting, Western, Signal Transduction, Gene Expression, Transforming Growth Factor beta, Reverse Transcriptase Polymerase Chain Reaction, Receptors, Notch, Smad2 Protein, Smad3 Protein, Amyloid Precursor Protein Secretases

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