ArticleBMC gastroenterology2024
USP9X regulates the proliferation, survival, migration and invasion of gastric cancer cells by stabilizing MTH1.
Article in BMC gastroenterology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Bioinformatics screening identifies USP9X as a pathogenic gene underlying thyroid and breast cancer comorbidity.Journal of molecular histology · 2026Article
- Bosutinib Inhibits USP9X to Suppress the Proliferation, Migration, Angiogenesis and Glycolysis of Hepatocellular Carcinoma Cells by Deubiquitinating PLK1.Clinical and experimental pharmacology & physiology · 2026Article
- The multifaceted regulatory roles of Nudix hydrolases in cancer and their therapeutic potential.Frontiers in oncology · 2025Review
- Dysregulation of deubiquitinases in gastric cancer progression.Frontiers in oncology · 2024Review
Corrections and comments
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Authors and funding
7 authors.
Funding
Abstract
backgroundMutT homolog 1 (MTH1) sanitizes oxidized dNTP pools to promote the survival of cancer cells and its expression is frequently upregulated in cancers. Polyubiquitination stabilizes MTH1 to facilitate the proliferation of melanoma cells, suggesting the ubiquitin system controls the stability and function of MTH1. However, whether ubiquitination regulates MTH1 in gastric cancers has not been well defined. This study aims to investigate the interaction between MTH1 and a deubiquitinase, USP9X, in regulating the proliferation, survival, migration, and invasion of gastric cancer cells.
methodsThe interaction between USP9X and MTH1 was evaluated by co-immunoprecipitation (co-IP) in HGC-27 gastric cancer cells. siRNAs were used to interfere with USP9X expression in gastric cancer cell lines HGC-27 and MKN-45. MTT assays were carried out to examine the proliferation, propidium iodide (PI) and 7-AAD staining assays were performed to assess the cell cycle, Annexin V/PI staining assays were conducted to examine the apoptosis, and transwell assays were used to determine the migration and invasion of control, USP9X-deficient, and USP9X-deficient plus MTH1-overexpressing HGC-27 and MKN-45 gastric cancer cells.
resultsCo-IP data show that USP9X interacts with and deubiquitinates MTH1. Overexpression of USP9X elevates MTH1 protein level by downregulating its ubiquitination, while knockdown of USP9X has the opposite effect on MTH1. USP9X deficiency in HGC-27 and MKN-45 cells causes decreased proliferation, cell cycle arrest, extra apoptosis, and defective migration and invasion, which could be rescued by excessive MTH1.
conclusionUSP9X interacts with and stabilizes MTH1 to promote the proliferation, survival, migration and invasion of gastric cancer cells.
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