Background
MicroRNAs (miRNA) recently evolved as potential cancer biomarkers. Therefore, the aim of the present study was to evaluate the prognostic impact of eight miRNAs connected to oral squamous cell carcinoma (OSCC).
Method
Expression levels of hsaâmirâ21â5p, hsaâmirâ29bâ3p, hsaâmirâ31â5p, hsaâmirâ99aâ5p, hsaâmirâ99bâ3p, hsaâmirâ100â5p, hsaâmirâ143â3p and hsaâmirâ155â5p were analyzed in tumor tissue (n = 36) and healthy oral mucosal tissue (n = 17) and correlated with clinical variables. Results of the study cohort were validated in an OSCC cohort of The Cancer Genome Atlas.
Results
Increased hsaâmirâ99bâ3p expression level showed a tendency toward advanced tumor stages, and high levels of hsaâmirâ100â5p expression were associated with extracapsular extension. While a high expression level of hsaâmirâ99bâ3p was associated with better survival, a high expression level of hsaâmirâ100â5p was correlated with a poorer survival in the study cohort.
Conclusion
Our results indicate that hsaâmirâ99bâ3p and hsaâmirâ100â5p may serve as novel prognostic biomarkers in OSCC.