ArticleCellular oncology (Dordrecht, Netherlands)2024
OTUB1 accelerates hepatocellular carcinoma by stabilizing RACK1 via its non-canonical ubiquitination.
Article in Cellular oncology (Dordrecht, Netherlands), 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed.
- OTUB1 Promotes HCC Progression by Regulating Glycolysis Through Deubiquitination of PKM2.Molecular carcinogenesis · 2026Article
- OTUB1 inhibits autophagy-dependent ferroptosis in hepatocellular carcinoma by stabilizing p62 via non-canonical deubiquitination.Cell death discovery · 2026Article
- PDIA6 exacerbates hepatocellular carcinoma via enhancing proteasome-dependent degradation of AKAP12.Cellular oncology (Dordrecht, Netherlands) · 2026Article
- The role of e3 ubiquitin ligases and deubiquitinating enzymes in hepatocellular carcinoma.Cell biology and toxicology · 2026Review
- Targeting the OTU family: a core therapeutic strategy for reshaping the immunosuppressive microenvironment and reversing drug resistance in HCC by coordinating the autophagy-ferroptosis balance.Cell death discovery · 2026Review
- Silencing OTUB1 induces pyroptosis to inhibit the growth of liver cancer HepG2 cells via the NLRP3/caspase/GSDM signaling pathway.Journal of gastrointestinal oncology · 2026Article
- Otubain deubiquitinases: Multi-layered regulators of cell fate, development, and stress responses across kingdoms.iScience · 2026Review
- OTU deubiquitinases as immune-circuit editors: from human immunopathology to therapeutic prioritization.Frontiers in immunology · 2026Review
- OTUD1 deficiency attenuates myocardial ischemia/reperfusion induced cardiomyocyte apoptosis by regulating RACK1 phosphorylation.Acta pharmacologica Sinica · 2025Article
- LRP11 facilitates lipid metabolism and malignancy in hepatocellular carcinoma by stabilizing RACK1 through USP5 regulation.Molecular medicine (Cambridge, Mass.) · 2025Article
- OTU deubiquitinases in cancer pathogenesis and precision therapy.American journal of cancer research · 2025Review
- Dissecting the dual role of OTU family proteins in tumor progression and immune escape.Frontiers in immunology · 2025Review
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Authors and funding
6 authors.
Funding
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Abstract
backgroundDysregulated ubiquitination modification occupies a pivotal role in hepatocellular carcinoma (HCC) tumorigenesis and progression. The ubiquitin aldehyde binding 1 (OTUB1) was aberrantly upregulated and exhibited the pro-tumorigenic function in HCC. However, the underlying mechanisms and responsible targets of OTUB1 remain unclear.
methodsFirst, bioinformatics analysis, western blot and immunohistochemistry staining were applied to analyze OTUB1 expression in HCC specimens. Then, immunoprecipitation assay-tandem mass spectrometry (MS) combined with the gene set enrichment analysis (GSEA) was used to explore the downstream target of OTUB1. Co-immunoprecipitation and ubiquitination assays were used to identify the mechanisms involved. Finally, we explored the regulatory effect of MAZ on OTUB1 through ChIP-qPCR and dual-luciferase reporter assay.
resultsOTUB1 was broadly elevated in HCC tissues and promoted the proliferation and metastasis of HCC in vitro and in vivo. The receptor for activated C kinase 1 (RACK1) performed as a functional partner of OTUB1 and its hyperactivation was associated with aggressive development and other malignant features in HCC by activating oncogenes transcription. Mechanistically, OTUB1 directly bound to RACK1 at its C-terminal domain and decreased the K48-linked ubiquitination of RACK1 through its non-canonical suppression of ubiquitination activity, which stabilized RACK1 protein levels in HCC cells. Therefore, OTUB1 significantly increased multiple oncogenes expression and activated PI3K/AKT and FAK/ERK signaling in a RACK1-dependent manner in HCC. Moreover, the transcription factor MAZ upregulated OTUB1 expression through identifying a putative response element of OTUB1 promoter area.
conclusionsOur findings might provide a new therapeutic strategy for HCC by modifying the MAZ-OTUB1-RACK1 axis.
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