CircRNA EPHB4 modulates stem properties and proliferation of gliomas via sponging miR-637 and up-regulating SOX10

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Gliomas are primary brain tumors with limited therapeutic options.
• Cancer stem cells (CSCs) drive tumor growth and recurrence in gliomas.
• The role of circular RNA ephrin type-B receptor 4 (circEPHB4) in glioma and CSCs remains unelucidated.

Purpose of the Study:

• To investigate the clinical significance and functional role of circEPHB4 in gliomas.
• To explore the molecular mechanisms underlying circEPHB4's function in glioma and CSCs.
• To assess the potential of the circEPHB4/miR-637/SOX10 axis as a therapeutic target.

Main Methods:

• Quantitative real-time PCR to assess circEPHB4, miR-637, and SOX10 expression.
• Correlation analysis between molecule expression and patient survival.
• In vitro experiments including cell transfection and Western blotting to study molecular interactions.
• In vivo xenograft models to evaluate the therapeutic efficacy of targeting the circEPHB4 axis.

Main Results:

• circEPHB4 and SOX10 were upregulated, while miR-637 was downregulated in glioma tissues and cell lines.
• circEPHB4 expression positively correlated with SOX10 and negatively with miR-637.
• circEPHB4 promoted glioma stemness, proliferation, and glycolysis by sponging miR-637 and upregulating SOX10 and Nestin.
• Silencing circEPHB4 or enhancing miR-637 inhibited tumor growth in vivo.

Conclusions:

• The circEPHB4/miR-637/SOX10/Nestin axis is crucial for glioma stemness, self-renewal, and glycolysis.
• This axis serves as a potential biomarker for overall survival in glioma patients.
• Targeting this axis presents a promising therapeutic strategy for malignant gliomas.