Transcriptome-wide analysis of circRNA and RBP profiles and their molecular relevance for GBM.

Area of Science:

• Neuro-oncology
• Molecular Biology
• Genomics

Background:

• Glioblastoma (GBM) is a highly aggressive brain cancer with poor prognosis.
• Aberrant expression of noncoding RNAs, including circular RNAs (circRNAs), is a hallmark of GBM.
• The roles of circRNAs and their interactions with RNA-binding proteins (RBPs) in GBM pathogenesis are not well understood.

Purpose of the Study:

• To investigate the expression profiles of circRNAs and RBPs in GBM.
• To identify potential diagnostic and prognostic biomarkers for GBM.
• To explore the functional roles of circRNA-RBP interactions in GBM development and progression.

Main Methods:

• RNA sequencing (RNA-seq) analysis of primary and recurrent GBM tumor samples.
• Differential expression analysis of circRNAs and RBP genes.
• Experimental validation of circRNA subcellular localization and interactions with RBPs (e.g., FUS).
• Functional assays to assess the role of specific circRNAs (e.g., circARID1A) in GBM cell proliferation.

Main Results:

• Identified differentially expressed circRNAs in primary GBM tumors.
• Discovered circRNAs acting as progression markers in recurrent GBM.
• Characterized the expression patterns of RBP genes in GBM.
• Demonstrated the potential of circRNAs and RBPs as GBM stratification markers.
• Validated subcellular localization and interactions of selected circRNAs with FUS.
• Showed that circARID1A promotes GBM cell proliferation.

Conclusions:

• CircRNA-RBP interactions play a regulatory role in gliomagenesis and GBM progression.
• Identified circRNAs and RBPs as potential diagnostic, prognostic, and stratification biomarkers for GBM.
• Provided a list of key molecular players for future GBM research.