Objective:

To investigate the expression and role of lncRNA GAS8-AS1 in differentiated thyroid cancers (DTCs) and its association with disease progression and metastasis, highlighting its potential clinical significance.

Key Findings:

• GAS8-AS1 expression was significantly downregulated in DTCs compared to matched normal tissues (p < 0.0001).
• Lower GAS8-AS1 expression was associated with early-stage disease (p = 0.03) and lymph node metastasis (p = 0.03).
• Deregulation of GAS8-AS1-associated genes was observed in 24% of DTCs, indicating a significant impact on tumor biology.
• Knockdown of GAS8-AS1 increased proliferation, migration, and invasion in thyroid cancer cells.
• Pathway enrichment analyses implicated GAS8-AS1-related genes in autophagy, apoptosis, proliferation, invasion, and metastasis.

Interpretation:

GAS8-AS1 may function as a tumor suppressor in DTCs, with its downregulation linked to disease progression and metastasis.

Limitations:

• The study does not address potential confounding factors that may influence GAS8-AS1 expression.

Conclusion:

The consistent loss of GAS8-AS1 expression and its functional impact on tumor progression suggest it may serve as a valuable diagnostic and prognostic biomarker in DTCs, warranting further investigation into its therapeutic potential.