Journal
CANCER SCIENCE
Volume 113, Issue 1, Pages 319-333Publisher
WILEY
DOI: 10.1111/cas.15184
Keywords
c-Myc; EMT; esophageal squamous cell carcinoma; metastasis; SNHG17
Categories
Funding
- Natural Science Foundation of Hebei Province, China [H2019206664]
- National Natural Science Foundation [81472335, 81772612]
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The study revealed that SNHG17 is upregulated in ESCC, directly regulates c-Myc transcription by binding to c-Jun protein, and promotes EMT to exacerbate ESCC progression. Furthermore, SNHG17 hyperactivation induced by TGF-beta 1 also activates the PI3K/AKT pathway, facilitating EMT formation.
Dysregulation of long noncoding RNA SNHG17 is associated with the occurrence of several tumors; however, its role in esophageal squamous cell carcinoma (ESCC) remains obscure. The present study demonstrated that SNHG17 was upregulated in ESCC tissues and cell lines, induced by TGF-beta 1, and associated with poor survival. It is also involved in the epithelial-to-mesenchymal transition (EMT) process. The mechanism underlying SNHG17-regulated c-Myc was detected by RNA immunoprecipitation, RNA pull-down, chromatin immunoprecipitation, and luciferase reporter assays. SNHG17 was found to directly regulate c-Myc transcription by binding to c-Jun protein and recruiting the complex to specific sequences of the c-Myc promoter region, thereby increasing its expression. Moreover, SNHG17 hyperactivation induced by TGF-beta 1 results in PI3K/AKT pathway activation, promoting cells EMT, forming a positive feedback loop. Furthermore, SNHG17 facilitated ESCC tumor growth in vivo. Overall, this study demonstrated that the SNHG17/c-Jun/c-Myc axis aggravates ESCC progression and EMT induction by TGF-beta 1 and may serve as a new therapeutic target for ESCC.
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