Document Detail

Comprehensive MicroRNA profiling for head and neck squamous cell carcinomas.
MedLine Citation:
PMID:  20145181     Owner:  NLM     Status:  MEDLINE    
PURPOSE: The objective of this study is to investigate the significance of microRNAs (miRNA) in patients with locally advanced head and neck squamous cell carcinoma (HNSCC). EXPERIMENTAL DESIGN: A global miRNA profiling was done on 51 formalin-fixed archival HNSCC samples using quantitative reverse transcription-PCR approach, correlated with patients' clinical parameters. Functional characterization of HNSCC-associated miRNAs was conducted on three HNSCC cell lines. Cell viability and proliferation were investigated using MTS and clonogenic assays, respectively; cell cycle analyses were assessed using flow cytometry. RESULTS: Thirty-eight of the 117 (33%) consistently detected miRNAs were significantly differentially expressed between malignant versus normal tissues. Concordant with previous reports, overexpression of miR-21, miR-155, let-7i, and miR-142-3p and underexpression of miR-125b and miR-375 were detected. Upregulation of miR-423, miR-106b, miR-20a, and miR-16 as well as downregulation of miR-10a were newly observed. Exogenous overexpression of miR-375 in HNSCC cell lines reduced proliferation and clonogenicity and increased cells in sub-G(1). Similar cellular effects were observed in knockdown studies of the miR-106b-25 cluster but with accumulation of cells in G(1) arrest. No major difference was detected in miRNA profiles among laryngeal, oropharyngeal, or hypopharyngeal cancers. miR-451 was found to be the only significantly overexpressed miRNA by 4.7-fold between nonrelapsed and relapsed patients. CONCLUSION: We have identified a group of aberrantly expressed miRNAs in HNSCC and showed that underexpression of miR-375 and overexpression of miR-106b-25 cluster might play oncogenic roles in this disease. Further detailed examinations of miRNAs will provide opportunities to dissect the complex molecular abnormalities driving HNSCC progression.
Angela B Y Hui; Michelle Lenarduzzi; Tiffaney Krushel; Levi Waldron; Melania Pintilie; Wei Shi; Bayardo Perez-Ordonez; Igor Jurisica; Brian O'Sullivan; John Waldron; Pat Gullane; Bernard Cummings; Fei-Fei Liu
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-02-09
Journal Detail:
Title:  Clinical cancer research : an official journal of the American Association for Cancer Research     Volume:  16     ISSN:  1078-0432     ISO Abbreviation:  Clin. Cancer Res.     Publication Date:  2010 Feb 
Date Detail:
Created Date:  2010-02-16     Completed Date:  2010-04-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9502500     Medline TA:  Clin Cancer Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1129-39     Citation Subset:  IM    
Division of Applied Molecular Oncology, Ontario Cancer Institute, University of Toronto, Toronto, Ontario, Canada.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Carcinoma, Squamous Cell / genetics*
Cell Line, Tumor
Head and Neck Neoplasms / genetics*
Middle Aged
Reg. No./Substance:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  High Frequency of p53/MDM2/p14ARF Pathway Abnormalities in Relapsed Neuroblastoma.
Next Document:  Finding the Right Dose for Cancer Therapeutics--Can We Do Better?