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A Model for Perineural Invasion in Head and Neck Squamous Cell Carcinoma
Published on: January 5, 2017
MiRNA Profiling of Areca Nut-Induced Carcinogenesis in Head and Neck Cancer
Hung-Han Huang1,2, Joseph T Chang3,4, Guo-Rung You2
1Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan.
Background:
While miRNAs are increasingly recognized for their role in tumorigenesis, their involvement in head and neck cancer (HNC) remains insufficiently explored. Additionally, the carcinogenic mechanisms of areca nut, a major habitual carcinogen in Southeast Asia, are not well understood.
Methods And Results:
This study adopts a systematic approach to identify miRNA profiles associated with areca nut-induced HNC. Using miRNA microarray analysis, we identified 292 miRNAs dysregulated in areca nut-treated HNC cells, with 136 upregulated and 156 downregulated. Bioinformatic analysis of the TCGA-HNSC dataset uncovered a set of 692 miRNAs relevant to HNC development, comprising 449 overexpressed and 243 underexpressed in tumor tissues. Integrating these datasets, we defined a signature of 84 miRNAs, including 39 oncogenic miRNAs (OncomiRs) and 45 tumor-suppressive miRNAs (TsmiRs), highlighting their pivotal role in areca nut-induced carcinogenesis. MultiMiR analysis identified 740 genes cross-regulated by eight hub TsmiRs, significantly impacting key cancer-related pathways (p53, PI3K-AKT, MAPK, and Ras) and critical oncogenic processes. Moreover, we validated miR-499a-5p as a vital regulator, demonstrating its ability to mitigate areca nut-induced cancer progression by reducing cell migration, invasion, and chemoresistance.
Conclusions:
Thus, this miRNA signature addresses a crucial gap in understanding the molecular underpinnings of areca nut-induced carcinogenesis and offers a promising platform for clinical applications in risk assessment, diagnosis, and prognosis of areca nut-associated malignancies.
Insights
This study identifies a unique microRNA (miRNA) signature linked to areca nut-induced head and neck cancer (HNC). This signature offers potential for early detection and improved treatment strategies for HNC patients.
Area of Science:
- Molecular Oncology
- Cancer Genomics
- Epigenetics
Background:
- MicroRNAs (miRNAs) are implicated in cancer, but their role in head and neck cancer (HNC) and areca nut carcinogenesis is unclear.
- Areca nut is a significant carcinogen in Southeast Asia, with poorly understood mechanisms of action.
Purpose of the Study:
- To systematically identify miRNA profiles associated with areca nut-induced HNC.
- To define a diagnostic and prognostic miRNA signature for areca nut-related HNC.
Main Methods:
- miRNA microarray analysis of areca nut-treated HNC cells.
- Bioinformatic analysis of The Cancer Genome Atlas Head and Neck Squamous Cell Carcinoma (TCGA-HNSC) dataset.
- Integration of microarray and TCGA data to define a miRNA signature.
- MultiMiR analysis to identify target genes and pathways.
Main Results:
- Identified 292 dysregulated miRNAs in areca nut-treated HNC cells (136 upregulated, 156 downregulated).
- Uncovered 692 miRNAs relevant to HNC development in the TCGA-HNSC dataset (449 overexpressed, 243 underexpressed).
- Defined an 84-miRNA signature (39 oncogenic, 45 tumor-suppressive) pivotal in areca nut carcinogenesis.
- Identified 740 genes regulated by hub tumor-suppressive miRNAs impacting key cancer pathways (p53, PI3K-AKT, MAPK, Ras).
- Validated miR-499a-5p as a key regulator mitigating areca nut-induced cancer progression.
Conclusions:
- The identified miRNA signature elucidates molecular mechanisms of areca nut-induced carcinogenesis.
- This signature provides a promising tool for clinical applications in risk assessment, diagnosis, and prognosis of areca nut-associated malignancies.
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