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Research Article Open access CC BY 3.0

Gene Expression Profiling Identified High-mobility Group AT-hook 2 (HMGA2) as Being Frequently Upregulated in Esophageal Squamous Cell Carcinoma

Leo C. M. Cheung, Kenneth K. Y. Lai, Alfred K. Y. Lam, Johnny C. O. Tang, John M. Luk, Nikki P. Lee, Yvonne Chung, Daniel K. H. Tong, Simon Law

Journal of Advances in Medicine and Medical Research · pp. 407–419 · Published 19 Feb 2013

10.9734/BJMMR/2013/2644

Abstract

Background: Esophageal cancer is one of the most deadly malignancies worldwide and esophageal squamous cell carcinoma (ESCC) is the most frequent type. Methods: We identified up-regulated genes from gene expression profiles of HKESC-4 cell line, its parental tumor tissues, non-tumoral esophageal epithelia and lymph nodes with metastatic carcinoma using Human Genome U133 Plus 2.0 microarray. Results: Four genes [High-mobility group AT-hook 2 (HMGA2), paternally expressed 10 (PEG10), SH3 and multiple ankyrin repeat domains 2 (SHANK2) and WNT1 inducible signaling pathway protein 3 (WISP3)] were selected for further validation with real-time quantitative polymerase chain reaction (qPCR) in a panel of ESCC cell lines and clinical specimens. HMGA2 was found to be overexpressed in the panel of ESCC cell lines tested. By using immunohistochemistry, HMGA2 was found to be up-regulated in 70% of ESCC tissues (21 out of 30 cases). Conclusion: This study demonstrates successful use of gene microarray to identify and reveal HMGA2 as a novel and consistently overexpressed gene in ESCC cell lines and clinical samples.

Esophageal cancer microarray HMGA2 PEG10 SHANK2 WISP3.

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