KINOMIC ALTERATIONS IN ATYPICAL MENINGIOMA.

Area of Science:

• Oncology
• Molecular Biology
• Biochemistry

Background:

• Atypical meningioma (') requires better understanding of signaling pathways, particularly altered kinases in recurrent tumors.
• Kinomic profiling can identify prognostic biomarkers for patient stratification and predict response to therapies.
• Identifying drug-actionable kinase targets is crucial for developing new treatment strategies.

Purpose of the Study:

• To perform high-throughput kinomic profiling of atypical meningioma.
• To identify specific kinase alterations associated with tumor recurrence.
• To explore the potential of kinomic data for predicting patient outcomes and guiding targeted therapies.

Main Methods:

• Utilized peptide-substrate microarray kinase activity analysis on a PamStation®12 platform.
• Analyzed the tyrosine kinome against approximately 144 target peptides kinetically.
• Correlated kinomic data with clinical outcomes, specifically tumor recurrence.

Main Results:

• Identified three major molecular clusters within atypical meningiomas.
• Observed significant peptide phosphorylation variations primarily involving EGFR family, ABL, BRK, and BMX kinases.
• Recurrent atypical meningiomas showed increased phosphorylation of BMX, TYRO3, and FAK substrates compared to non-recurrent tumors.

Conclusions:

• Atypical meningiomas exhibit molecular sub-clustering with potential phenotypic and prognostic implications.
• Increased kinase activity in recurrent tumors may indicate resistance to current therapies.
• These kinomic insights advance the understanding of atypical meningioma recurrence and identify potential kinase targets for therapeutic intervention.