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DNA methylation data of tumor and non-tumor liver (NTL) tissues from Peruvian patients with hepatocellular carcinoma (HCC).

ABSTRACT: A large fraction of HCC in Peru arises in younger, non-cirrhotic patients. Global DNA methylation analysis of the HCC and non-tumor liver (NTL) tissues demostrate a profound overhaul of the developmental DNA methylation programme culminating in an global hyper-methylated pattern in HCC. We used microarrays to compare global DNA methylation between tumor and non-tumor liver tissues and identified CpGs and ontologies that are distinctively differentially methylated between subsets.

ORGANISM(S): Homo sapiens

PROVIDER: GSE136319 | GEO | 2021/01/31

REPOSITORIES: GEO

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DNA methylation data of tumor and non-tumor liver tissues from Peruvian patients with hepatocellular carcinoma (HCC)

Project description:A large fraction of HCC in Peru arises in younger, non-cirrhotic patients. Global DNA methylation analysis of the HCC and non-tumor liver (NTL) tissues demostrate a profound overhaul of the developmental DNA methylation programme culminating in an global hyper-methylated pattern in HCC. We used microarrays to compare global DNA methylation between tumor and non-tumor liver tissues and identified CpGs and ontologies that are distinctively differentially methylated between subsets.

2021-01-31 | GSE136380 | GEO

DNA hydroxy-methylation data of tumor and non-tumor liver (NTL) tissues from Peruvian patients with hepatocellular carcinoma (HCC)

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Expression data of tumor and non-tumor liver tissues from Peruvian patients with hepatocellular carcinoma (HCC)

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DNA methylation data of tumor and non-tumor liver (NTL) tissues from Peruvian patients with hepatocellular carcinoma (HCC).

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DNA hydroxy-methylation data of tumor and non-tumor liver (NTL) tissues from Peruvian patients with hepatocellular carcinoma (HCC)

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Expression data in non-tumor liver tissues from Peruvian patients with hepatocellular carcinoma.

Project description:Most hepatocellular carcinomas in younger patients from Peru arise from non-cirrhotic livers. Histological examination of the non-tumor liver tissues highlights the presence of clear cell foci in a significant fraction of Peruvian patients with hepatocellular carcinoma. We used microarrays to compare gene expression between non-tumor liver tissues with and without clear cell foci and identified ontologies that are distinctively differentially expressed between subsets.

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Project description:Hepatocellular carcinoma (HCC) is one of the most common and lethal cancers worldwide and has a poor prognosis. Promoters represent an essential regulatory element of gene transcription in the human genome. In order to understand the promoter methylation in relation with gene transcription in HCCs, we applied a liquid hybridization capture-based bisulfite sequencing (LHC-BS) approach to examine the promoter methylome of HCCs, for which we customized 150,407 capture probes and enabled coverage of 91.8% of the RefSeq gene promoters within the human genome. We found the differential promoter DNA methylation between HCCs and peripheral normal tissues. Then we integrated promoter methylomic and transcriptomic profiling and described gene expression and regulation in HCCs. Lastly, we validated the key genes in a larger number of samples and screened candidate genes aberrantly regulated by DNA methylation in human HCCs. Capture-based whole genome promoter bisulfite-seq for 8 pairs of HCC tumor and non-tumor liver (NTL) samples.

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DNA methylation data of tumor and non-tumor liver tissues from Peruvian patients with hepatocellular carcinoma (HCC)

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Genome-wide promoter DNA Methylation Profiling of Hepatocellular Carcinomas Arising Either Spontaneously or due to Chronic Exposure to Ginkgo biloba Extract (GBE) in B6C3F1/N Mice [Methylation]

Project description:Epigenetic modifications, such as DNA methylation, play an important role in carcinogenesis. In a recent NTP study, chronic exposure of B6C3F1/N mice to Ginkgo biloba extract (GBE) resulted in a high incidence of hepatocellular carcinomas (HCC). Genome-wide promoter methylation profiling on GBE-exposed HCC (2000 mg/kg group), spontaneous HCC (vehicle-control group) and age-matched vehicle control liver was performed to identify differentially methylated genes in GBE-exposed HCC and spontaneous HCC. DNA methylation alterations were correlated to the corresponding global gene expression changes to identify differentially methylated promoter regions of relevant cancer genes altered in GBE-exposed HCC compared to spontaneous HCC.

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