Objective:

To explore the potential of previously uncharacterized orphan RNA molecules as specific biomarkers for cancer identity and their role as oncogenic drivers.

Key Findings:

• Orphan RNAs are selectively activated in cancer cells and largely absent from normal adult tissues.
• These RNAs create tumor-specific expression patterns and are detectable in blood-derived RNA.
• Orphan RNAs can serve as molecular barcodes to distinguish cancer types based on circulating nucleic acids.
• Some orphan RNAs are associated with tumor growth and regulatory pathways, suggesting they may act as oncogenic drivers.

Interpretation:

The specificity of orphan RNAs indicates their potential utility in refining cancer classification and enhancing liquid biopsy assays for early detection and monitoring.

Limitations:

• Further studies are needed to establish the clinical relevance of orphan RNAs in cancer subtype signatures and treatment response.

Conclusion:

Orphan RNAs may become invaluable tools in cancer understanding and treatment, expanding the landscape of potential RNA biomarkers.