Circular RNA circHECTD1 facilitates glioma progression by regulating the miR-296-3p/SLC10A7 axis

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Glioma is a common primary brain tumor with limited treatment outcomes for recurrent cases.
• Circular RNAs (circRNAs) are increasingly recognized for their roles in human cancers.
• The specific role of circHECTD1 in glioma remains largely unexplored.

Purpose of the Study:

• To investigate the expression and function of circHECTD1 in glioma.
• To elucidate the molecular mechanism underlying circHECTD1's role in glioma progression.
• To identify potential therapeutic targets for glioma treatment.

Main Methods:

• Utilized the Gene Expression Omnibus database to identify differentially expressed circRNAs.
• Quantified circHECTD1 expression in glioma tissues and cell lines.
• Performed in vitro and in vivo experiments to assess the functional impact of circHECTD1 knockdown.
• Conducted luciferase reporter assays and RNA immunoprecipitation to validate molecular interactions.
• Performed rescue experiments to confirm the regulatory pathway.

Main Results:

• CircHECTD1 expression was significantly elevated in glioma tissues and cell lines, correlating with poorer patient survival.
• Knockdown of circHECTD1 suppressed glioma cell proliferation and invasion in vitro and reduced tumor growth in vivo.
• CircHECTD1 directly targets miR-296-3p, which in turn negatively regulates SLC10A7.
• Overexpression of SLC10A7 partially rescued the inhibitory effects of circHECTD1 silencing.

Conclusions:

• Identified a novel circHECTD1/miR-296-3p/SLC10A7 axis critical for glioma tumorigenesis and invasiveness.
• CircHECTD1 acts as an oncogenic circRNA in glioma by sponging miR-296-3p and upregulating SLC10A7.
• The circHECTD1/miR-296-3p/SLC10A7 pathway represents a promising therapeutic target for glioma intervention.