Molecular Signature of Long Non-Coding RNA Associated with Areca Nut-Induced Head and Neck Cancer

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Areca nut is a major carcinogen for head and neck cancer (HNC) in Southeast Asia.
• The molecular mechanisms, particularly the role of long non-coding RNAs (lncRNAs), in areca nut-induced HNC are not fully understood.

Purpose of the Study:

• To identify lncRNA signatures associated with areca nut-induced HNC.
• To investigate the diagnostic and prognostic potential of these lncRNAs.
• To explore the functional role of specific lncRNAs in HNC progression.

Main Methods:

• Systemic strategy to identify lncRNAs.
• PCR array analysis of HNC cells treated with areca nut.
• Bioinformatics analysis of The Cancer Genome Atlas Head-Neck Squamous Cell Carcinoma (TCGA-HNSC) dataset.
• Independent validation of key lncRNAs.
• Cellular studies to assess functional roles.

Main Results:

• Identified 84 cancer-related lncRNAs; 28 dysregulated by areca nut in HNC cells.
• Found 45 differentially expressed lncRNAs in HNC tumor tissues.
• Integrated analysis revealed 10 lncRNAs dysregulated by areca nut and altered in patients.
• Validated five oncogenic and one tumor-suppressive lncRNA; LUCAT1, UCA1, and MIR31HG implicated in oncogenic pathways.
• LUCAT1 showed diagnostic potential (AUC=0.815); identified lncRNAs linked to worse prognosis.
• MIR31HG silencing reduced arecoline-induced invasion in HNC cells.

Conclusions:

• Identified lncRNA signatures critical in areca nut-induced HNC.
• These lncRNAs hold potential as biomarkers for risk assessment, diagnosis, and prognosis.
• Specific lncRNAs like MIR31HG actively promote HNC progression, suggesting therapeutic targets.