Analysis of gene copy number changes in head and neck cancer

Autor:	Nejat Dalay, Emin Karaman, Nur Buyru, Elif Baltaci
Rok vydání:	2018
Předmět:	0301 basic medicine Genetics business.industry Cancer Chromosome MTDH medicine.disease medicine.disease_cause MED1 03 medical and health sciences 030104 developmental biology 0302 clinical medicine Otorhinolaryngology 030220 oncology & carcinogenesis Medicine Multiplex ligation-dependent probe amplification Copy-number variation business Carcinogenesis Gene
Zdroj:	Clinical Otolaryngology. 43:1004-1009
ISSN:	1749-4486 1749-4478
DOI:	10.1111/coa.12686
Popis:	Objective Chromosomal alterations and copy number changes are frequent events in tumors, leading to amplification of focal regions containing several oncogenes. Gains and losses of several regions have been reported in head and neck cancer (HNC) but the copy number changes of the individual genes located in these regions have not been analyzed so far. In this study we aimed to analyze the copy number variations in patients with HNC. Design Prospective study Setting University hospital Participants 50 patients with squamous cell carcinoma of the head and neck Methods Copy number changes and amplifications of 22 genes in tumors and matched tissue were analyzed by MLPA which allows simultaneous analysis of gene copy numbers in multiple genetic regions. Results Amplifications were observed in 52% and losses were detected in 20% of the samples. Chromosome 8 was found to harbor the most frequent copy number alterations. The most frequently amplified genes were CCND1 and the MED1 genes followed by the MTDH and MYC genes on the long arm and ZNF703 on the short arm of chromosome 8. Amplification of the ZNF703, PRDM14 and MYC genes were highly correlated suggesting that the genes displaying high copy number changes on chromosome 8 collaborate during carcinogenesis. Conclusions The alterations found in our study supports the contribution of gene amplifications and indicate cooperation between certain oncogenes in the pathogenesis of HNSCC. Correlations between amplification of less familiar genes and known oncogenes warrant further investigation. This article is protected by copyright. All rights reserved.
Databáze:	OpenAIRE
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