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Methylation in Taiwanese HCC tumor and adjacent tissues

ABSTRACT: We analyzed tumor and adjacent non-tumor tissues from 62 Taiwanese HCC cases using Illumina HumanMethylation 27 chips. After Bonferroni adjustment, a total of 2,324 CpG sites significantly differed in methylation level, with 684 CpG sites significantly hypermethylated and 1,640 hypomethylated in tumor compared to non-tumor tissues. Array data were validated with pyrosequencing in a subset of 5 of these genes; correlation coefficients ranged from 0.92 to 0.97. 62 tumor and 62 adjacent non tumor tissues

ORGANISM(S): Homo sapiens

SUBMITTER: Regina Santella

PROVIDER: E-GEOD-37988 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Genome-wide DNA methylation profiles in hepatocellular carcinoma.

Shen Jing J Wang Shuang S Zhang Yu-Jing YJ Kappil Maya M Wu Hui-Chen HC Kibriya Muhammad G MG Wang Qiao Q Jasmine Farzana F Ahsan Habib H Lee Po-Huang PH Yu Ming-Whei MW Chen Chien-Jen CJ Santella Regina M RM

Hepatology (Baltimore, Md.) 20120424 6

<h4>Unlabelled</h4>Alterations in DNA methylation frequently occur in hepatocellular cancer (HCC). We have previously demonstrated that hypermethylation in candidate genes can be detected in plasma DNA before HCC diagnosis. To identify, with a genome-wide approach, additional genes hypermethylated in HCC that could be used for more accurate analysis of plasma DNA for early diagnosis, we analyzed tumor and adjacent nontumor tissues from 62 Taiwanese HCC cases using Illumina methylation arrays (Il ...[more]

PMID: 22234943

Similar Datasets

Methylation in Taiwanese HCC tumor and adjacent tissues

Project description:We analyzed tumor and adjacent non-tumor tissues from 62 Taiwanese HCC cases using Illumina HumanMethylation 27 chips. After Bonferroni adjustment, a total of 2,324 CpG sites significantly differed in methylation level, with 684 CpG sites significantly hypermethylated and 1,640 hypomethylated in tumor compared to non-tumor tissues. Array data were validated with pyrosequencing in a subset of 5 of these genes; correlation coefficients ranged from 0.92 to 0.97.

2012-05-16 | GSE37988 | GEO

Homo sapiens

Project description:Methylation in Taiwanese HCC tumor and adjacent tissues

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Exploring genome-wide DNA methylation profiles altered in hepatocellular carcinoma using Infinium HumanMethylation 450 BeadChips

2014-01-30 | GSE54503 | GEO

Exploring genome-wide DNA methylation profiles altered in hepatocellular carcinoma using Infinium HumanMethylation 450 BeadChips

Project description:We examine genome-wide DNA methylation profiles in 66 pairs of HCC tumor and adjacent non-tumor tissues. After Bonferroni adjustment, a total of 130,512 CpG sites significantly differed in methylation level in tumor compared to non-tumor tissues, with 28,017 CpG sites hypermethylated and 102,495 hypomethylated in tumor tissues. Most (60.1%) significantly hypermethylated CpG sites are located in CpG islands. These results demonstrate the significance of aberrant DNA methylation in HCC tumorigenesis. Bisulfite modification of 1µg DNA was conducted using an EZ DNA Methylation Kit (Zymo Research, Irvine, CA) according to the manufacturer’s procedure. The Infinium Methylation 450K assay was performed according to Illumina’s standard protocol. Six HCC tumor/adjacent non-tumor tissue pairs were processed on the same chip to avoid chip-to-chip variation.

2014-01-30 | E-GEOD-54503 | biostudies-arrayexpress

Relationship between Genome-Wide DNA Methylation and Gene Expression in Uterine Leiomyoma

Project description:Uterine leiomyomas, or fibroids, represent the most common benign tumor of the female reproductive tract. Fibroids become symptomatic in 30% of all women and up to 70% of African American women of reproductive age. Epigenetic dysregulation of individual genes has been demonstrated in leiomyoma cells; however, the in vivo genome-wide distribution of such epigenetic abnormalities, however, remains unknown. Principal Findings: We characterized and compared genome-wide DNA methylation and mRNA expression profiles in uterine leiomyoma and matched adjacent normal myometrial tissues from 18 African-American women. We found 55 genes with differential promoter methylation and concominant differences in mRNA expression in uterine leiomyoma versus normal myometrium. Eighty percent of the identified genes showed an inverse relationship DNA methylation status and mRNA expression in uterine leiomyoma tissues, and the majority of genes (62%) displayed hypermethylation associated with gene silencing. We selected two genes, the known tumor suppressors KLF11 and DLEC1, and verified promoter hypermethylation and mRNA repression using bisulfite sequencing and real-time PCR. Incubation of primary leiomyoma smooth muscle cells with a DNA methyltransferase inhibitor restored KLF11 and DLEC1 mRNA levels. paired LM and MM tissue samples

2012-04-29 | E-GEOD-31699 | biostudies-arrayexpress

Homo sapiens

Project description:Nonkeratinizing Carcinoma Tissues: Tumor vs. Adjacent non-tumor tissues

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Copy Number Variants at Chromosome 10q11.21, 12p12.1 and 21q22.11 May Be Associated with Hyperlipidemia in Taiwanese Patients

Project description:Affymetrix SNP array analysis was performed on DNA extracted from whole blood samples of 7 Taiwanese patients with hyperlipidemia. Three copy number variant (CNV) regions associated significantly with hyperlipidemia were identified through genomic segmentation analysis (P<0.001). 7 male Taiwanese hyperlipidemia patients.

2015-05-01 | E-GEOD-38149 | biostudies-arrayexpress

Genome-scale analysis of aberrant DNA methylation in colorectal cancer

Project description:To characterize DNA methylation-based subgroups in colorectal cancer, we performed genome-scale DNA methylation profiling of 125 colorectal tumor samples and 29 histologically normal-adjacent colonic tissue samples using the Illumina Infinium DNA methylation assay, which assesses the DNA methylation status of 27,578 CpG sites located at the promoter regions of 14,495 protein-coding genes. We identified four DNA methylation-based subgroups of CRC using model-based cluster analyses. Each subtype shows characteristic genetic and clinical features, indicating that they represent biologically distinct subgroups. Bisulfite converted DNA from fresh frozen 125 colorectal tumors and 29 adjacent normal tissues were hybridized to the Illumina Infinium 27k Human Methylation Beadchip v1.2

2011-06-03 | E-GEOD-25062 | biostudies-arrayexpress

Genome-scale DNA methylation profiling of lung adenocarcinoma: validation using Ontario Tumor Bank samples

Project description:The independent population of lung adenocarcinoma and adjacent non-tumor lung used for verification of the EDRN/Canary Foundation study 28 lung adenocarcinoma and 27 adjacent non-tumor lung fresh frozen tissues were macrodissected, bisulfite treated and analyzed on the Illumina Infinium HumanMethylation27K BeadChip

2012-03-21 | E-GEOD-32866 | biostudies-arrayexpress

Methylation profile in breast cancer

Project description:Agilent CpG microarray in combination with enriched methylated DNA by a MBD protein were carried out in each pool of genomic DNA from primary breast tumor and matched adjacent normal tissues. 1.Common reference vs enriched methylated DNA in tumor 2. Common reference vs enriched methylated DNA in adjacent normal 3. Then compare two data indirectly

2011-02-23 | E-GEOD-27374 | biostudies-arrayexpress

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