GEO DataSets

(Submitter supplied) We performed whole-genome methylation analysis using 450K Illumina BeadArrays on different human cell types. In total 24 experiments were performed. Dermal fibroblasts, three different epidermal melanocytes (dark, medium and light pigmentation), epidermal keratinocytes, mammary fibroblasts, mammary epithelial cells, mammary endothelial cells and mesenchymal stem cells were analyzed in technical duplicates. more...

Organism:

Homo sapiens

Type:

Methylation profiling by genome tiling array

Platform:

GPL13534

24 Samples

Download data: IDAT, TXT

(Submitter supplied) Aberrant DNA methylation is frequently observed in breast cancer. However, the relationship between methylation patterns and the heterogeneity of breast cancer has not been comprehensively characterized. Whole-genome DNA methylation analysis using 450K Illumina BeadArrays was performed on 188 human breast tumors. Unsupervised bootstrap consensus clustering was performed to identify DNA methylation epigenetic subgroups (epitypes). more...

Organism:

Homo sapiens

Type:

Methylation profiling by genome tiling array

Platform:

GPL13534

188 Samples

Download data: 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 GPL10558

253 Samples

Download data

(Submitter supplied) Lung cancer is the worldwide leading cause of death from cancer. DNA methylation in gene promoter regions is a major mechanism of gene expression regulation that may promote tumorigenesis. Experimental Design Whole-genome DNA methylation analysis using 450K Illumina BeadArrays was performed on 12 normal lung tissues and 124 tumors including 83 adenocarcinomas, 23 squamous cell carcinomas (SqCC), one adenosquamous cancer, five large cell carcinomas, nine large cell neuroendocrine carcinomas (LCNEC), and three small cell carcinomas (SCLC). more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL10558

117 Samples

Download data: TXT

(Submitter supplied) Lung cancer is the worldwide leading cause of death from cancer. DNA methylation in gene promoter regions is a major mechanism of gene expression regulation that may promote tumorigenesis. However, whether clinically relevant subgroups based on DNA methylation patterns exist in lung cancer is not well studied. We performed whole-genome methylation analysis using 450K Illumina BeadArrays on 124 tumors including 83 adenocarcinomas, 23 squamous cell carcinomas, one adenosquamous cancer, five large cell carcinomas, nine large cell neuroendocrine carcinomas (LCNEC), three small cell carcinomas (SCLC) and 12 normal lung tissues. more...

Organism:

Homo sapiens

Type:

Methylation profiling by genome tiling array

Platform:

GPL13534

136 Samples

Download data: TXT, XLS

(Submitter supplied) It is now well understood that epigenetic alterations occur frequently in sporadic breast carcinogenesis, but little is known about the epigenetic alterations associated with familial breast tumors. We performed genome-wide DNA methylation profiling on familial breast cancers (n=33) to identify patterns of methylation specific to the different mutation groups (BRCA1, BRCA2 and BRCAx) or intrinsic subtypes of breast cancer (basal, luminal A, luminal B, HER2 and normal-like). more...

Organism:

Homo sapiens

Type:

Methylation profiling by genome tiling array

Platform:

GPL5082

33 Samples

Download data: CEL, TXT

(Submitter supplied) Genome wide DNA methylation profiling of normal and tumoral tissues of the breast. The Illumina Infinium 450k Human DNA methylation Beadchip was used to obtain DNA methylation profiles across approximately 450 thousand CpGs in fresh frozen tissue samples (40 primary breast tumours and 17 normal breast tissues). Samples included morphologically normal samples of each tissue and tumor samples.

Organism:

Homo sapiens

Type:

Methylation profiling by genome tiling array

Platform:

GPL13534

57 Samples

Download data: TXT

(Submitter supplied) While the basal-like subtype accounts for only a small subset of all breast cancer cases, it is associated with the worst prognosis. The majority of basal-like tumors are triple-negative (ER-, PR-, and HER2-negative), and thus lack molecular targets for therapy. To identify potential molecular markers and/or pathways that are critical to the basal-like tumor phenotype, we investigated the deregulation of microRNAs in primary breast tumors from an ethnically diverse cohort of patients. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL7504

8 Samples

Download data

(Submitter supplied) Introduction: Five different molecular subtypes of breast cancer have been identified through gene expression profiling. Each subtype has a characteristic expression pattern suggested to partly depend on cellular origin. We aimed to investigate whether the molecular subtypes also display distinct methylation profiles. Methods: We analysed methylation status of 807 cancer-related genes in 189 fresh frozen primary breast tumours and four normal breast tissue samples using an array-based methylation assay. more...

Organism:

Homo sapiens

Type:

Methylation profiling by array

Platform:

GPL9183

193 Samples

Download data: TXT

(Submitter supplied) BACKGROUND: Promoter hypermethylation coupled with loss of heterozygosity at the same locus results in loss of gene function in many tumor cells. The "rules" governing which genes are methylated during the pathogenesis of individual cancers, how specific methylation profiles are initially established, or what determines tumor type-specific methylation are unknown. However, DNA methylation markers that are highly specific and sensitive for common tumors would be useful for the early detection of cancer, and those required for the malignant phenotype would identify pathways important as therapeutic targets. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL570

7 Samples

Download data: CEL

(Submitter supplied) Abstract Background: Promoter hypermethylation coupled with loss of heterozygosity at the same locus results in loss of gene function in many tumor cells. The “rules” governing which genes are methylated during the pathogenesis of individual cancers, how specific methylation profiles are initially established, or what determines tumor-type specific methylation are unknown. However, DNA methylation markers that are highly specific and sensitive for common tumors would be useful for the early detection of cancer, and those required for the malignant phenotype identify pathways important as therapeutic targets. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL570

42 Samples

Download data: CEL

(Submitter supplied) We have used a human gene promoter tiling microarray platform to analyze a cell line model of lymph node metastasis comprised of a poorly metastatic MDA-MB-468GFP human breast adenocarcinoma cell line and its highly metastatic variant (468LN). Gene networks and pathways associated with metastasis were identified and target genes associated with epithelial-mesenchymal transition (EMT) was validated with respect to DNA methylation effects on gene expression. more...

Organism:

Homo sapiens

Type:

Methylation profiling by genome tiling array

Platform:

GPL5082

6 Samples

Download data: CEL, TXT

(Submitter supplied) The underlying biology through which established breast cancer risk factors contribute to disease risk is not well characterized. One key risk factor for breast cancer is age, and age-related DNA methylation alterations may contribute to increased risk of disease. Here we assessed normal breast tissues and tested the relation of DNA methylation with known breast cancer risk factors. Cancer-free women donated breast tissue biopsy specimens through the Susan G. more...

Organism:

Homo sapiens

Type:

Methylation profiling by array

Platform:

GPL13534

100 Samples

Download data: IDAT

(Submitter supplied) Methylated genomic fragments from tumor DNA and matching normal control were enriched with the methylated-CpG island recovery assay (MIRA); amplified, labeled and hybridized on Agilent CpG island tiling oligo arrays. MIRA enriched samples from tumor were labeled with Cy5 while MIRA enriched DNA samples from normal tissue were labeled with Cy3. Keywords: Cancer

Organism:

Homo sapiens

Type:

Methylation profiling by genome tiling array

Platform:

GPL4126

6 Samples

Download data: GPR

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

Organism:

Homo sapiens

Type:

Expression profiling by array; Genome variation profiling by array

8 related Platforms

105 Samples

Download data

(Submitter supplied) Summary: Breast cancer cell lines have been used widely to investigate breast cancer pathobiology and new therapies. Breast cancer is a molecularly heterogeneous disease, and it is important to understand how well and which cell lines best model that diversity. In particular, microarray studies have identified molecular subtypes (luminal A, luminal B, ERBB2-associated, basal-like and normal-like) with characteristic gene-expression patterns and underlying DNA copy number alterations (CNAs). more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL7785

50 Samples

Download data

(Submitter supplied) Breast cancer cell lines have been used widely to investigate breast cancer pathobiology and new therapies. Breast cancer is a molecularly heterogeneous disease, and it is important to understand how well and which cell lines best model that diversity. In particular, microarray studies have identified molecular subtypes - luminal A, luminal B, ERBB2-associated, basal-like and normal-like - with characteristic gene-expression patterns and underlying DNA copy number alterations (CNAs). more...

Organism:

Homo sapiens

Type:

Genome variation profiling by array

7 related Platforms

55 Samples

Download data

(Submitter supplied) A microarray targeting promoters of cancer-related genes was used to evaluate DNA methylation at 935 CpG sites in 517 invasive breast tumors from the Carolina Breast Cancer Study (CBCS), a population-based study of invasive breast cancer. Concensus clustering using methylation (β) values for the 167 most variant CpG loci defined 4 clusters differing most distinctly in hormone receptor (HR) status, intrinsic subtype (luminal versus basal-like) and p53 mutation status. more...

Organism:

Homo sapiens

Type:

Methylation profiling by array

Platform:

GPL9183

526 Samples

Download data: TXT

(Submitter supplied) Aberrant methylation at the promoter region of tumor suppressors is frequently reported in NPC; however, genome-wide methylation changes have not been comprehensively investigated. Therefore, we systematically analyzed methylome data in 25 primary NPC tumors and non-tumor counterparts using Illumina HumanMethylation450 BeadChip.

Organism:

Homo sapiens

Type:

Methylation profiling by array

Platform:

GPL13534

50 Samples

Download data: TXT

(Submitter supplied) Promoter methylation was assayed in a number of breast cancer and control normal samples along with the effects of 5'-aza-2'-deoxycytidine on breast cancer cell line transcriptomes. Aberrant promoter hypermethylation is frequently observed in cancer. The potential for this to contribute to tumour development depends on whether the genes affected are repressed because of their methylation. Many aberrantly methylated genes play important roles in development and are bivalently marked in ES cells suggesting that their aberrant methylation may reflect developmental processes. more...

Organism:

Homo sapiens

Type:

Methylation profiling by array; Expression profiling by array

Platforms:

GPL8490 GPL6947

107 Samples

Download data: TXT