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Integrative array-based approach identifies MZB1 as a frequently methylated putative tumor-suppressor in hepatocellular carcinoma (MeDIP)

ABSTRACT: The analysis of DNA methylation profiles was performed by methylated DNA immunoprecipitation (MeDIP) using anti-5-methylcytidine antibody (Eurogentec, Seraing, Belgium) followed by the Human 244K Agilent CpG island microarray (Agilent, Santa Clara, CA)

ORGANISM(S): Homo sapiens

PROVIDER: GSE35312 | GEO | 2012/03/31

SECONDARY ACCESSION(S): PRJNA156019

REPOSITORIES: GEO

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Integrative array-based approach identifies MZB1 as a frequently methylated putative tumor-suppressor in hepatocellular carcinoma (MeDIP)

Project description:The analysis of DNA methylation profiles was performed by methylated DNA immunoprecipitation (MeDIP) using anti-5-methylcytidine antibody (Eurogentec, Seraing, Belgium) followed by the Human 244K Agilent CpG island microarray (Agilent, Santa Clara, CA) Genomic DNAs from Hep3B, HepG2 and HuH-7 cells were used for cancer samples and that from a normal liver tissue from surgical sample of colon cancer metastasis, as a control sample (C20)

2012-03-30 | E-GEOD-35312 | biostudies-arrayexpress

Integrative array-based approach identifies MZB1 as a frequently methylated putative tumor-suppressor in hepatocellular carcinoma (expression)

2012-03-31 | GSE35311 | GEO

Integrative array-based approach identifies MZB1 as a frequently methylated putative tumor-suppressor in hepatocellular carcinoma (expression)

Project description:Gene expression was profiled using a 4x44K Human Whole Genome Ver. 2.0 gene expression array (Agilent Technologies) according to the manufacturer's instructions (Microarray-based gene expression analysis protocol ver. 5.0.1, Agilent Technologies) Total RNAs extracted from Hep3B, HepG2, and HuH-7 cell lines and from these cell lines treated with 10 ?M 5-aza-dCyd for 5 days were used for conventional and pharmacological unmasking analyses, respectively. Total RNAs from two normal livers (C20 and C40) were used as controls.

2012-03-30 | E-GEOD-35311 | biostudies-arrayexpress

Mice liver and urine LC-MS data

Project description:Mouse livers were analyzed by lipidomics and urine by metabolomics.An Agilent Ultra-Performance Liquid Chromatography/Electrospray Ion Quadrupole Time-of-Flight-Mass Spectrometer (UPLC-ESI-QTOFMS) (Agilent, Santa Clara, CA) was utilized for lipid and other metabolites proofing in this work.

2023-06-07 | PXD041465 | Pride

Integrative array-based approach identifies MZB1 as a frequently methylated putative tumor-suppressor in hepatocellular carcinoma

Project description:This SuperSeries is composed of the SubSeries listed below.

2012-03-31 | GSE35313 | GEO

Integrative array-based approach identifies MZB1 as a frequently methylated putative tumor-suppressor in hepatocellular carcinoma

Project description:This SuperSeries is composed of the following subset Series: GSE35311: Integrative array-based approach identifies MZB1 as a frequently methylated putative tumor-suppressor in hepatocellular carcinoma (expression) GSE35312: Integrative array-based approach identifies MZB1 as a frequently methylated putative tumor-suppressor in hepatocellular carcinoma (MeDIP) Refer to individual Series

2012-03-30 | E-GEOD-35313 | biostudies-arrayexpress

Assessing the efficiency and significance of Methylated DNA Immunoprecipitation (MeDIP) assays in using in vitro methylated genomic DNA.

Project description:BackgroundDNA methylation contributes to the regulation of gene expression during development and cellular differentiation. The recently developed Methylated DNA ImmunoPrecipitation (MeDIP) assay allows a comprehensive analysis of this epigenetic mark at the genomic level in normal and disease-derived cells. However, estimating the efficiency of the MeDIP technique is difficult without previous knowledge of the methylation status of a given cell population. Attempts to circumvent this problem have involved the use of in vitro methylated DNA in parallel to the investigated samples. Taking advantage of this stratagem, we sought to improve the sensitivity of the approach and to assess potential biases resulting from DNA amplification and hybridization procedures using MeDIP samples.FindingsWe performed MeDIP assays using in vitro methylated DNA, with or without previous DNA amplification, and hybridization to a human promoter array. We observed that CpG content at gene promoters indeed correlates strongly with the MeDIP signal obtained using in vitro methylated DNA, even when lowering significantly the amount of starting material. In analyzing MeDIP products that were subjected to whole genome amplification (WGA), we also revealed a strong bias against CpG-rich promoters during this amplification procedure, which may potentially affect the significance of the resulting data.ConclusionWe illustrate the use of in vitro methylated DNA to assess the efficiency and accuracy of MeDIP procedures. We report that efficient and reproducible genome-wide data can be obtained via MeDIP experiments using relatively low amount of starting genomic DNA; and emphasize for the precaution that must be taken in data analysis when an additional DNA amplification step is required.

| S-EPMC2949662 | biostudies-literature

caArray_EXP-574: TCGA(Kirc): Gene Expression Analysis of TCGA samples using Agilent Expression 244K microarrays (UNC)

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caArray_EXP-576: TCGA (LUAD): Gene Expression Analysis of TCGA samples using Agilent Expression 244K microarrays (UNC)

Project description:Gene Expression Analysis of TCGA samples using Agilent Expression 244K microarrays.

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