GEO DataSets

(Submitter supplied) Breast cancer is a profoundly heterogeneous disease with respect to biological and clinical behavior. Gene expression profiling has been used to dissect this complexity and stratify tumors into intrinsic gene expression subtypes associated with distinct biology, patient outcome and different genomic alterations. Additionally, breast tumors occurring in individuals with germline BRCA1 or BRCA2 mutations typically fall into distinct subtypes. more...

Organism:

Homo sapiens

Type:

Expression profiling by array; Genome variation profiling by array

Platforms:

GPL4723 GPL5345 GPL7247

718 Samples

Download data: GPR, TXT

(Submitter supplied) Amplification of chromosomal region 11q13, containing the cell cycle regulatory gene CCND1, is frequently found in breast cancer and other malignancies. It is associated with the favourable oestrogen receptor (ER) positive breast tumour phenotype, but also with poor prognosis and treatment failure. 11q13 spans almost 14 Mb and contains more than 200 genes and is affected by various patterns of copy number gains, suggesting complex mechanisms and selective pressure during tumour progression. more...

Organism:

Homo sapiens

Type:

Genome variation profiling by genome tiling array

Platforms:

GPL7247 GPL4723

94 Samples

Download data: GPR

(Submitter supplied) Background: The amplification event occurring at chromosome locus 11q13, reported in several different cancers, includes a number of potential oncogenes. We have previously reported amplification of one such oncogene, CCND1, to be correlated with an adverse effect of tamoxifen in premenopausal breast cancer patients. Overexpression of cyclin D1 protein however, confers tamoxifen resistance but not a tamoxifen induced adverse effect. more...

Organism:

Homo sapiens

Type:

Genome variation profiling by genome tiling array

Platforms:

GPL4723 GPL7247

56 Samples

Download data: GPR

(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) HER2 gene amplification and protein overexpression (HER2+) define a clinically challenging subgroup of breast cancer with variable prognosis and response to therapy. Although gene expression profiling has identified an ERBB2 molecular subtype of breast cancer, it is clear that HER2+ tumors reside in all molecular subtypes and represent a genomically and biologically heterogeneous group. Genome-wide DNA copy number profiling, using BAC array comparative genomic hybridization (aCGH) were performed on 200 tumors with mixed clinical characteristics and amplification of HER2. more...

Organism:

Homo sapiens

Type:

Genome variation profiling by genome tiling array

Platforms:

GPL7247 GPL9077 GPL4723

200 Samples

Download data: GPR

(Submitter supplied) 89 tumors from women that were eligible for, and subjected to, routine diagnostic testing according to the HBOC criteria but were negative for pathogenic BRCA1/2-mutations or carried an UV in either BRCA1/2

Organism:

Homo sapiens

Type:

Genome variation profiling by genome tiling array

Platform:

GPL4560

89 Samples

Download data: TXT

(Submitter supplied) Prediction of BRCA2-association in hereditary breast carcinomas with array-CGH

Organism:

Homo sapiens

Type:

Genome variation profiling by genome tiling array

Platform:

GPL4560

47 Samples

Download data: TXT

(Submitter supplied) Genomic DNA from sporadic breast tumours was isolated and analysed using array CGH. The NKI 1MB BAC/PAC micro array was used to identify chromosomal aberrations of all tumours. Keywords: sporadic breast tumour, CGH

Organism:

Homo sapiens

Type:

Genome variation profiling by genome tiling array

Platform:

GPL4560

47 Samples

Download data: TXT

(Submitter supplied) We analysed a cohort of 75 BRCA1, BRCA2 and non-BRCA1/2 breast tumors by gene expression profiling and found that 74% BRCA1 tumors were basal-like, 73% of BRCA2 tumors were luminal A or B, and 52% non-BRCA1/2 tumors were luminal A. Thirty-four tumors were also analysed by single nucleotide polymorphism-comparative genomic hybridization (SNP-CGH) arrays. Copy number data could predict whether a tumor was basal-like or luminal with high accuracy, but could not predict its mutation class. more...

Organism:

Homo sapiens

Type:

Expression profiling by array; Genome variation profiling by SNP array; SNP genotyping by SNP array

Platforms:

GPL6986 GPL6106

109 Samples

Download data: TXT

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

Organism:

Homo sapiens

Type:

Expression profiling by array; Genome variation profiling by SNP array

Platforms:

GPL3720 GPL570 GPL3718

395 Samples

Download data: CEL

(Submitter supplied) To find BRCA1-associated copy number abberations, the copy number profiles of Familial Basal-like BRCA1-mutated breast carcinomas were compared to Familial Basal-like carcinomas with no pathgogenic BRCA1/2 mutation. This led to the observation of unanticipated heterogeneity of the BRCA1 associated copy number profiles. Gene expression analysis on the same samples identified tumor infiltrating lymphocytes to be responsible for this observation. more...

Organism:

Homo sapiens

Type:

Genome variation profiling by SNP array

Platforms:

GPL3720 GPL3718

240 Samples

Download data: CEL

(Submitter supplied) CHEK2 1100delC is a moderate-risk cancer susceptibility allele that confers a high breast cancer risk in a polygenic setting. Gene expression profiling of CHEK2 1100delC breast cancers may reveal clues to the nature of the polygenic CHEK2 model and its genes involved. Here, we report global gene expression profiles of a cohort of 155 familial breast cancers, including 26 CHEK2 1100delC mutant tumors. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL570

155 Samples

Download data: CEL

(Submitter supplied) The purpose of this study was to improve prediction of patients at high-risk for metastatic disease utilizing a nested case-control design that uniquely enables enrichment for relevant phenotypes. We identified all women diagnosed with primary breast cancer from January 1, 1997, to December 31, 2005, in the Stockholm health care region. Patients developing distant metastatic disease (cases) were selected and controls (free from distant disease) were randomly matched by adjuvant therapy, age and calendar period at diagnosis. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL10379

623 Samples

Download data: CEL

(Submitter supplied) OBJECTIVES: Amplification of the 11q13 locus is commonly observed in a number of human cancers including both breast and ovarian cancer. Cyclin D1 and EMS1 have been implicated as candidate oncogenes involved in the emergence of amplification at this locus. Detailed analysis of the 11q13 amplicon in breast cancer led to the discovery of four regions of amplification suggesting the involvement of other genes. more...

Organism:

Homo sapiens

Type:

Genome variation profiling by array

Platform:

GPL8641

51 Samples

Download data

(Submitter supplied) Breast tumors from BRCA1 germ line mutation carriers typically exhibit features of the basal-like molecular subtype. However, the specific genes recurrently mutated as a consequence of BRCA1 dysfunction have not been fully elucidated. In this study, we utilized gene expression profiling to molecularly subtype 577 breast tumors, including 73 breast tumors from BRCA1/2 mutation carriers. Focusing on the RB1 locus, we analyzed 33 BRCA1-mutated, 36 BRCA2-mutated and 48 non-BRCA1/2-mutated breast tumors using a custom-designed high-density oligomicroarray covering the RB1 gene. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL5345

577 Samples

Download data: GPR, TXT

(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

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(Submitter supplied) A survey of the somatic allelic imbalances and copy number alterations in HER2-amplified breast cancer.

Organism:

Homo sapiens

Type:

Genome variation profiling by SNP array; SNP genotyping by SNP array

Platforms:

GPL13314 GPL8882

26 Samples

Download data: TXT

(Submitter supplied) Introduction: In breast cancers, the basal-like subtype has high levels of genomic instability relative to other breast cancer subtypes with many basal-like-specific regions of aberration. There is evidence that this genomic instability extends to smaller scale genomic aberrations as well, as shown by a previously described micro-event in the PTEN gene in the Basal-like SUM149 breast cancer cell line. more...

Organism:

Homo sapiens

Type:

Genome variation profiling by array; Genome variation profiling by genome tiling array

8 related Platforms

192 Samples

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