Expression Profiling Identifies Circular RNA Signature in Hepatoblastoma

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Hepatoblastoma is the most common pediatric liver cancer.
• Circular RNAs (circRNAs) are crucial gene regulators often altered in cancers.
• The role of circRNAs in hepatoblastoma remains largely unexplored.

Purpose of the Study:

• To investigate the expression profile and clinical significance of circRNAs in hepatoblastoma.
• To identify specific circRNAs involved in hepatoblastoma pathogenesis.
• To elucidate the mechanism of circRNA action in hepatoblastoma cells.

Main Methods:

• Circular RNA microarray analysis to identify differentially expressed circRNAs.
• Bioinformatic analyses (GO, pathway, miRNA sponge prediction) for functional prediction.
• In vitro assays (MTT, Ki67, Transwell) to assess circRNA function and mechanism.

Main Results:

• Identified 869 differentially expressed circRNAs in hepatoblastoma, with 421 upregulated and 448 downregulated.
• Enriched GO terms included "chromosome organization" and "cytoplasm"; tight junction pathway was significantly affected.
• circ_0015756 was upregulated, and its silencing inhibited hepatoblastoma cell viability, proliferation, and invasion, acting as a miR-1250-3p sponge.

Conclusions:

• circRNAs play a significant role in hepatoblastoma pathogenesis.
• circ_0015756 emerges as a potential biomarker for hepatoblastoma prognosis and diagnosis.
• circ_0015756 represents a promising therapeutic target for hepatoblastoma treatment.