GEO DataSets

Analysis of colorectal cancer (CRC) cell lines treated with 5-aza-2’-deoxycytidine (5-aza-dC). 5-aza-dC, a DNA methylation inhibitor, was used to reactivate silenced genes in the CRC cell lines. Results provide insight into the molecular mechanisms underlying epigenetic alterations in CRC.

Organism:

Homo sapiens

Type:

Expression profiling by array, transformed count, 2 agent, 5 cell line sets

Platform:

GPL570

Series:

GSE32323

10 Samples

Download data: CEL

(Submitter supplied) Unearthing of silenced genes in colorectal cancer (CRC) is of great importance. We employed oligonucleotide microarray to find changes in global gene expression of five CRC cell lines. These were analyzed before and after treatment with the 5-aza-2'-Deoxycitidine. Expression of the responding genes was integrated with gene expression profiling generated by microarray analysis of matched colorectal tissue samples. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Datasets:

GDS4382 GDS4397

Platform:

GPL570

44 Samples

Download data: CEL

Analysis of paired colorectal cancer (CRC) tumors and adjacent non-cancerous tissues. Colorectal cancer is a worldwide public health problem. Results provide insight into the molecular mechanisms underlying CRC carcinogenesis.

Organism:

Homo sapiens

Type:

Expression profiling by array, transformed count, 17 individual, 2 tissue sets

Platform:

GPL570

Series:

GSE32323

34 Samples

Download data: CEL

(Submitter supplied) Microarray-based DNA methylation and gene expression profiling was carried out using a panel of prostate cancer cell lines (LNCaP-FGC, DU-145, and PC-3) and the control normal prostate RWPE1 cell line. The identification of prostate cancer-specific methylation markers was based on the following criteria: a difference in DNA methylation level (β) of at least 0.5, and at least a 2-fold difference in expression level between cancer and control cells. more...

Organism:

Homo sapiens

Type:

Expression profiling by array; Methylation profiling by array

Platforms:

GPL6947 GPL8490

8 Samples

Download data: TXT

(Submitter supplied) 61 human HCCs were analyzed for genome-wide gene expression. Samples were collected at two sites in Germany, Heidelberg (HD) and Hannover (N). The Heidelberg Collection include 40 independent HCC: 19 liver resections and 17 explant liver specimen (4 not determined); median age at surgery was 57 years (range, 16-78), and the male/female ratio was 3:1. All diagnoses were confirmed by histological reevaluation, and use of the samples was approved by the local ethics committee. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL14550

80 Samples

Download data: TXT

(Submitter supplied) We found frequent epigenetic silencing of microRNA-34b/c in human colorectal cancer. Introduction of miR-34b/c into a colorectal cancer cell line induced significant changes in gene expression profile. We also found overlap between the genes downregulated by miR-34b/c and those downregulated by DAC. Keywords: dose response

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL4133

5 Samples

Download data: TXT

(Submitter supplied) Estrogen signaling and epigenetic modifications, in particular DNA methylation, are involved in regulation of gene expression in breast cancers. Here we investigated a potential regulatory cross-talk between these two pathways by identifying their common target genes and exploring potential underlying molecular mechanisms in human MCF7 breast cancer cells. Principal Findings: Gene expression profiling revealed that the expression of approximately 150 genes was influenced by both 17β-estradiol (E2) and a hypomethylating agent 5-aza-2’-deoxycytidine (DAC). more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL13158

12 Samples

Download data: CEL, XLS

(Submitter supplied) To identify genes responsible for the synergistic effect of DAC with Dex, we performed cDNA microarray analyses using cDNA prepared from Dex-resistant OPM1 cells treated with/without Dex, DAC or DAC+Dex.

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL4133

4 Samples

Download data: TXT

(Submitter supplied) Background: In high-grade serous ovarian cancer (HGSOC) intrinsic and/or acquired resistance against platinum-containing chemotherapy is a major obstacle for successful treatment. A low frequency of somatic mutations, but frequent epigenetic alterations including DNA methylation in HGSOC tumors, presents the cancer epigenome as a relevant target for innovative therapy. Patient-derived xenografts (PDXs) supposedly are good preclinical models for identifying novel drug targets. more...

Organism:

Homo sapiens

Type:

Methylation profiling by genome tiling array

Platform:

GPL13534

22 Samples

Download data: IDAT

(Submitter supplied) Using an oligonucleotide array, we undertook a genome-wide search for genes upregulated following treatment with a demethylating agent in two CRC cell lines. Promoter methylation status was determined in 12 CRC cell lines and 11 CRC tissues. After the treatment, 350 genes were upregulated 1.5 fold or more. Six genes (PAGE-5, VCX, MAEL, GAGED2, UCHL1, and GAGE7), which contained putative 5'CpG islands in their promoter regions, were confirmed to be silenced in CRC cell lines. more...

Organism:

Homo sapiens

Type:

Expression profiling by array; Methylation profiling by array

Platform:

GPL1291

4 Samples

Download data: TXT

(Submitter supplied) The puropose of this experiment was to identify gene expression changes that result from 5-aza-2-deoxycytidine induced DNA demethylation of Swarm rat chondrosarcoma cells. The gene expression profiles of untreated Swarm rat chondrosarcoma cells were compared to the gene expression profiles of Swarm rat chondrosarcoma cells that were treated for 5 passages with a low dose of 5-aza-2-deoxycytidine (0.1uM).

Organism:

Rattus norvegicus

Type:

Expression profiling by array

Platform:

GPL8990

5 Samples

Download data: PAIR

(Submitter supplied) DNA methylation (5-mC) and hydroxymethylation (5-hmC) are regarded as important epigenetic hallmarks in the carcinogenesis of colorectal cancer by transcriptional regulation. 5hmC is an intermediate during active demethylation and maintains the equilibrium of DNA methylation. Previous studies on DNA methylation don’t differentiate 5-hmC from 5-mC. Here, in order to elucidate the epigenetic mechanisms of carcinogenesis of colorectal cancer, we integrate genome wide levels of 5-mC, 5-hmC and Transcriptional expression. more...

Organism:

Homo sapiens

Type:

Methylation profiling by high throughput sequencing; Expression profiling by high throughput sequencing

Platform:

GPL11154

36 Samples

Download data: TXT, WIG, XML

(Submitter supplied) In order to identify the specific DNA methylation pattern of different rhabdomyosarcoma (RMS) samples we performed a genome-wide study using Human DNA methylation platform (Agilent).

Organism:

Homo sapiens

Type:

Methylation profiling by genome tiling array

Platform:

GPL19930

15 Samples

Download data: TXT

(Submitter supplied) Colorectal cancer (CRC) is a genetically heterogeneous disease with several distinct morphological growth patterns. This study was aimed to investigate genes differentially expressed between ulcerative and polypoid colorectal CRC. cDNA microarray was first employed to compare the gene expression profiling of ulcerative and polypoid CRC with paired normal mucosa. Potential candidates identified by data filtering were further validated using quantitative real-time polymerase chain reaction, western blot and immunohistochemistry. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL17157

16 Samples

Download data: GPR

(Submitter supplied) DNA methylation is tightly linked with gene expression regulation and has long been regarded a stable epigenetic mark in postmitotic cells. However, it recently became clear that postnatal brains appear to show stimulus-induced de novo CpG methylation or active demethylation related to neuronal plasticity. Due to striking homologies between the brains of birds and mammals, songbirds, especially the zebra finch, propose an attractive model for investigating the genome-wide DNA methylation profile and DNA methylation reconfiguration during brain development. more...

Organism:

Taeniopygia guttata

Type:

Methylation profiling by high throughput sequencing; Expression profiling by high throughput sequencing

Platform:

GPL19155

10 Samples

Download data: BEDGRAPH, TXT

(Submitter supplied) This SuperSeries is composed of the SubSeries listed below.

Organism:

Homo sapiens

Type:

Expression profiling by array; Methylation profiling by genome tiling array

Platforms:

GPL13534 GPL96

106 Samples

Download data: CEL, IDAT

(Submitter supplied) Colorectal tumorigenesis proceedes through well defined clinical stages assoicated with charateristic mutations. Besides genetic alterations, epi-driver genes that are aberrantly expressed in cancers in a fashion that confers a seletive growth advantage can also contribute to tumor evolution. To gain a global view of methylation patterns in normal and maliganant colorectal epithelia, we performed genome-wide DNA methylation analysis on DNAs from 48 fresh frozen CRC samples at different stages of CRC progression. more...

Organism:

Homo sapiens

Type:

Methylation profiling by genome tiling array

Platform:

GPL13534

48 Samples

Download data: IDAT, TXT

(Submitter supplied) Colorectal cancer (CRC) tumorigenesis proceedes through well defined clinical stages assoicated with charateristic mutations. To get a better understanding of CRC progression at the transcriptional level, we performed transcriptome profiling on samples from normal colonic tissues, pre-malignant adenomas, carcinomas and metatases. We used Affymatrix microarry to get a broad view of gene expression during colorectal cancer progression and identified significantly differentially expressed genes between different stages

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL96

58 Samples

Download data: CEL

(Submitter supplied) Abnormal miRNA expression has been linked to the development and progression of human cancers, and such dysregulation can result from aberrant DNA methylation. We combined the analysis of miRNA expression data deposited with empirical DNA methylation data in HCT116 and DKO colon cancer cells (SRA accession# SRP001414) to identify novel DNA methylation regulated miRNAs. ABSTRACT: Abnormal microRNA (miRNA) expression has been linked to the development and progression of several human cancers, and such dysregulation can result from aberrant DNA methylation. more...

Organism:

Homo sapiens

Type:

Non-coding RNA profiling by array

Platform:

GPL8179

6 Samples

Download data: TXT

(Submitter supplied) We have used genome-wide methylation microarrays to analyze differences in CpG methylation patterns in cells relevant to the pathogenesis of myeloma plasma cells, including B cells, normal plasma cells, MGUS, presentation myeloma, and plasma cell leukemia (PCL). We show that methylation patterns in these cell types are capable of distinguishing non-malignant from malignant cells and that the main reason for this difference is hypomethylation of the genome at the transition from MGUS to presentation myeloma. more...

Organism:

Homo sapiens

Type:

Methylation profiling by array

Platform:

GPL8490

190 Samples

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