Small Nucleolar RNAs in Head and Neck Squamous Cell Carcinomas.

Area of Science:

• Molecular Biology
• Genomics
• Oncology

Background:

• Small nucleolar RNAs (snoRNAs) are noncoding RNAs, often intronic, with diverse structures.
• Dysregulated snoRNA expression is observed in various human malignancies, including head and neck squamous cell carcinoma (HNSCC).
• High-throughput sequencing has identified numerous differentially expressed snoRNAs in HNSCC tissues.

Purpose of the Study:

• To review the structure, expression profile, and role of snoRNAs in HNSCC progression.
• To explore the potential of snoRNAs as diagnostic and therapeutic targets for HNSCC management.

Main Methods:

• Analysis of snoRNA expression profiles in HNSCC cohorts using high-throughput sequencing.
• Review of existing literature on snoRNA function and mechanisms in HNSCC carcinogenesis.
• In vitro and in vivo studies investigating the functional roles of snoRNAs and their host genes.

Main Results:

• 113 out of 1,524 snoRNA genes were found to be survival-related in a 567 HNSCC cohort.
• Upregulated snoRNAs promote HNSCC by activating oncogenes or the Wnt/β-catenin pathway, enhancing tumor cell viability and migration.
• Knockdown of host genes suppressed Wnt/β-catenin signaling and restrained tumor growth in vivo.
• Four snoRNAs were downregulated, with SNORA36B and U3 potentially acting as protective factors.

Conclusions:

• Dysregulated snoRNAs are integral to HNSCC carcinogenesis and development.
• SnoRNAs exert their functions through microRNA-like activities and regulation of alternative splicing.
• Further research into snoRNA expression and function may yield novel diagnostic and therapeutic strategies for HNSCC.