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CircMALAT1 promotes cancer stem‐like properties and chemoresistance via regulating Musashi‐2/c‐Myc axis in esophageal squamous cell carcinoma
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CircMALAT1 promotes cancer stem‐like properties and chemoresistance via regulating Musashi‐2/c‐Myc axis in esophageal squamous cell carcinoma
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Journal Article
CircMALAT1 promotes cancer stem‐like properties and chemoresistance via regulating Musashi‐2/c‐Myc axis in esophageal squamous cell carcinoma
2024
Overview
The primary challenge in treating esophageal squamous cell carcinoma (ESCC) is resistance to chemotherapy. Cancer stem cell (CSC) is the root cause of tumor drug resistance. Therefore, targeting CSCs has been considered promising therapeutic strategy for tumor treatment. Here, we report that circMALAT1 was significantly upregulated in ESCC CSC‐like cells and primary tumors from ESCC patients. Clinically, there was a positive correlation between circMALAT1 expression and ESCC stage and lymph node metastasis, as well as poor prognosis for ESCC patients. In vitro and in vivo functional studies revealed that circMALAT1 promoted CSC‐like cells expansion, tumor growth, lung metastasis and drug resistance of ESCC. Mechanistically, circMALAT1 directly interacted with CSC‐functional protein Musashi RNA Binding Protein 2 (MSI2). CircMALAT1 inhibited MSI2 ubiquitination by preventing it from interacting with β‐transducin repeat containing protein (BTRC) E3 ubiquitin ligase. Also, circMALAT1 knockdown inhibited the expression of MSI2‐regulating CSC‐markers c‐Myc in ESCC. Collectively, circMALAT1 modulated the ubiquitination and degradation of the MSI2 protein signaling with ESCC CSCs and accelerated malignant progression of ESCC. CircMALAT1 has the potential to serve as a biomarker for drug resistance and as a target for therapy in CSCs within ESCC. CircMALAT1 modulated the ubiquitination and degradation of the MSI2 protein signaling with ESCC CSCs and accelerated malignant progression of ESCC.
Publisher
John Wiley & Sons, Inc,John Wiley and Sons Inc,Wiley
