Cited by 13Liver physiology and pathologyTGF-β signaling in diseasesUbiquitin and proteasome pathways

Ubiquitin specific peptidase 1 promotes hepatic fibrosis through positive regulation of CXCL1 by deubiquitinating SNAIL

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Du, Zhiyong, Wu, Tianchong, Liu, Linsen, Luo, Biwei, Wei, Cuifeng·2022·Digestive and Liver Disease

Abstract

Background Hepatic fibrosis is attributed to an imbalance of extracellular matrix production and lysis. Human hepatic stellate cells (HSCs) have been uncovered to converge through complex interactions with hepatocytes and immune cells, causing scarring in liver damage. Aims We aimed to investigate the expression status of ubiquitin specific peptidase 1 (USP1) and its potential mechanisms on HSCs and hepatic fibrosis. Methods Hepatic fibrosis animal and cell models were generated using mice with carbon tetrachloride (CCl4) treatment and HSCs LX-2 with TGF-β1 treatment. Relationships among USP1, SNAIL, and CXCL1 were identified via dual-luciferase reporter gene assay, co-immunoprecipitation, and chromatin immunoprecipitation. With gain- and loss-of-experiments, CCK-8 and flow cytometry assays were employed for cell proliferation and apoptosis. Results USP1 upregulated SNAIL expression through deubiquitination to increase CXCL1 expression. USP1 downregulation decreased expressions of fibrosis-related genes, suppressed proliferation, and promoted apoptosis in TGF-β1-induced LX-2 cells, which were reversed by SNAIL overexpression. The pro-fibrosis role caused by SNAIL upregulation was abolished by CXCL1 reduction. Promotive function of USP1/SNAIL/CXCL1 axis in hepatic fibrosis was further confirmed in vivo. Conclusion These data supported siRNA-mediated silencing of USP1 improved hepatic fibrosis through inhibition of SNAIL and CXCL1, which yields a new therapeutic target for hepatic fibrosis treatment.

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  1. Olazabal-Herrero A , Garcia-Santisteban I , Rodriguez JA . Mutations in the 'Fin- gers' subdomain of the deubiquitinase USP1 modulate its function and activity. FEBS J 2016;283:929-46 .

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Authors
Du, Z., Wu, T., Liu, L., Luo, B., & Wei, C.
Affiliations
  • Jinan University (CN)
  • First People’s Hospital of Jingmen (CN)
Corresponding author
Wei, Cuifeng
Venue
Digestive and Liver Disease
Publisher
Elsevier BV
Published
2022-01
Volume
54
Issue
1
Pages
91-102
ISSN
1590-8658 (ISSN-L)
OpenAlex
W3159564328
Cited by
13
References
34
Citations by year
2026: 2 · 2025: 3 · 2024: 3 · 2023: 5
FWCI
1.12
Type
journal article
Language
en
Open access
Locations
  • Digestive and Liver Disease (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Natural Science Foundation of China (201911, 81470868)
Topics
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › TGF-β signaling in diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
Keywords
liver fibrosis, USP1, snails, CXCL1, deubiquitination, hepatic stellate cells, TGF-β1, carbon tetrachloride, extracellular matrix, therapeutic target
MeSH terms
Snail Family Transcription Factors, Animals, Disease Models, Animal, Gene Expression Regulation, Liver Cirrhosis, Up-Regulation, Gene Silencing, RNA, Small Interfering, Mice, Chemokine CXCL1, Hepatic Stellate Cells, Ubiquitin-Specific Proteases

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