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CpG island hypermethylation and repetitive DNA hypomethylation in premalignant lesion of extrahepatic cholangiocarcinoma

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dc.contributor.authorKim, Baek-hui-
dc.contributor.authorCho, Nam-Yun-
dc.contributor.authorShin, So Hyun-
dc.contributor.authorKwon, Hyeong-Ju-
dc.contributor.authorKang, Gyeong Hoon-
dc.contributor.authorJang, Ja June-
dc.date.accessioned2012-05-30T07:00:52Z-
dc.date.available2012-05-30T07:00:52Z-
dc.date.issued2009-10-
dc.identifier.citationVIRCHOWS ARCHIV; Vol.455 4; 343-351ko_KR
dc.identifier.issn0945-6317-
dc.identifier.urihttps://hdl.handle.net/10371/76622-
dc.description.abstractBiliary intraepithelial neoplasia (BilIN) is the premalignant lesion of extrahepatic cholangiocarcinoma (EHC), and there are no published data regarding epigenetic changes throughout disease progression from normal biliary epithelia to BilIN to EHC. The objective of this study was to identify the occurrence of CpG island hypermethylation and repetitive DNA hypomethylation in BilIN. A total of 50 EHCs, 31 BilINs, and 31 normal cystic duct samples were analyzed for their methylation status in seven genes and two repetitive DNA elements. The number of methylated genes increased with disease progression (normal bile duct, 0.6; BilIN, 2.0; EHC, 3.6; P<0.001). The methylation level of examined genes was significantly higher in BilIN than in normal samples (TMEFF2, HOXA1, NEUROG1, and RUNX3, P<0.05) and in EHC than in BilIN samples (TMEFF2, HOXA1, NEUROG1, RUNX3, RASSF1A, and APC, P<0.05). Long interspersed nucleotide element-1 (LINE-1) and juxtacentromeric satellite 2 (SAT2) methylation levels were markedly lower in EHC than in normal duct and BilIN samples, and BilIN samples showed a decrease of SAT2 methylation levels but no decrease of LINE-1 methylation levels compared to normal samples. These findings suggest that most of cancer-specific CpG island hypermethylation occur in the stage of BilIN and that CpG island hypermethylation seems to occur earlier than repetitive DNA element hypomethylation.ko_KR
dc.language.isoenko_KR
dc.publisherSPRINGERko_KR
dc.subjectBiliary intraepithelial neoplasiako_KR
dc.subjectDNA hypomethylationko_KR
dc.subjectDNA hypermethylationko_KR
dc.subjectCholangiocarcinomako_KR
dc.subjectCpG islandko_KR
dc.titleCpG island hypermethylation and repetitive DNA hypomethylation in premalignant lesion of extrahepatic cholangiocarcinomako_KR
dc.typeArticleko_KR
dc.contributor.AlternativeAuthor김백희-
dc.contributor.AlternativeAuthor조남윤-
dc.contributor.AlternativeAuthor신소현-
dc.contributor.AlternativeAuthor권형주-
dc.contributor.AlternativeAuthor장자준-
dc.contributor.AlternativeAuthor강경훈-
dc.identifier.doi10.1007/s00428-009-0829-4-
dc.citation.journaltitleVIRCHOWS ARCHIV-
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dc.description.tc4-
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