Genome-wide DNA methylation analysis in hepatocellular carcinoma.

Abstract:

:Epigenetic changes as well as genetic changes are mechanisms of tumorigenesis. We aimed to identify novel genes that are silenced by DNA hypermethylation in hepatocellular carcinoma (HCC). We screened for genes with promoter DNA hypermethylation using a genome-wide methylation microarray analysis in primary HCC (the discovery set). The microarray analysis revealed that there were 2,670 CpG sites that significantly differed in regards to the methylation level between the tumor and non-tumor liver tissues; 875 were significantly hypermethylated and 1,795 were significantly hypomethylated in the HCC tumors compared to the non‑tumor tissues. Further analyses using methylation-specific PCR, combined with expression analysis, in the validation set of primary HCC showed that, in addition to three known tumor-suppressor genes (APC, CDKN2A, and GSTP1), eight genes (AKR1B1, GRASP, MAP9, NXPE3, RSPH9, SPINT2, STEAP4, and ZNF154) were significantly hypermethylated and downregulated in the HCC tumors compared to the non-tumor liver tissues. Our results suggest that epigenetic silencing of these genes may be associated with HCC.

journal_name

Oncol Rep

journal_title

Oncology reports

authors

Yamada N,Yasui K,Dohi O,Gen Y,Tomie A,Kitaichi T,Iwai N,Mitsuyoshi H,Sumida Y,Moriguchi M,Yamaguchi K,Nishikawa T,Umemura A,Naito Y,Tanaka S,Arii S,Itoh Y

doi

10.3892/or.2016.4619

subject

Has Abstract

pub_date

2016-04-01 00:00:00

pages

2228-36

issue

4

eissn

1021-335X

issn

1791-2431

journal_volume

35

pub_type

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