GEO DataSets

(Submitter supplied) Background: Gene expression profiling of breast carcinomas has increased our understanding of the heterogeneous biology of this disease and promises to impact clinical care. The aim of this study was to evaluate the prognostic value of gene expression-based classification along with established prognostic markers and mutation status of the TP53 gene, in a group of breast cancer patients with long-term (12-16 years) follow-up. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

5 related Platforms

81 Samples

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(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) The biological tumor samples (ie, breast tumor specimens) consisted of freshly frozen breast tumors from a population-based cohort of 315 women representing 65% of all breast cancers resected in Uppsala County, Sweden, from January 1, 1987 to December 31, 1989. Estrogen receptor status was determined by biochemical assay as part of the routine clinical procedure. An experienced pathologist determined the Elston-Ellis grades of the tumors, classifying the tumors into low, medium and high-grade tumors. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platforms:

GPL97 GPL96

502 Samples

Download data: CEL

(Submitter supplied) subpopulation of breat cancer using gene expression data and clinical data Keywords: breast cancer survival and metastasis analysis

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL2567

311 Samples

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(Submitter supplied) Our findings indicate that the integration of expression signatures and clinicopathological factors can better determine the individual risk of recurrence for newly diagnosed patients with lymph-node negative ER-positive breast cancer. Models incorporating other variables yet to be discovered will be needed to obtain robust prognostic models for ER-negative and HER2-positive breast cancer patients.

Organism:

Homo sapiens

Type:

Expression profiling by array

4 related Platforms

42 Samples

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(Submitter supplied) Gastric cancer, a leading cause of cancer-related deaths, is a heterogeneous disease, with little consensus on molecular subclasses and their clinical relevance. We describe four molecular subtypes linked with distinct patterns of molecular alterations, disease progression and prognosis viz. a) Microsatellite Instable: hypermutated intestinal subtype tumors occurring in antrum, best overall prognosis, lower frequency of recurrence (22%), with liver metastasis in 23% of recurred cases; b) Mesenchymal-like: diffuse tumors with worst prognosis, a tendency to occur at an earlier age and highest recurrence (63%) with peritoneal seeding in 64% of recurred cases, low frequency of molecular alterations; c) TP53-inactive with TP53 loss, presence of focal amplifications and chromosomal instability; and d) TP53-active marked by EBV infection and PIK3CA mutations. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL570

100 Samples

Download data: CEL

(Submitter supplied) Gastric cancer, a leading cause of cancer related deaths, is a heterogeneous disease, with little consensus on molecular subclasses and their clinical relevance. We describe four molecular subtypes linked with distinct patterns of molecular alterations, disease progression and prognosis via: a) Microsatellite Instable: hypermutated intestinal subtype tumors occurring in antrum, best overall prognosis, lower frequency of recurrence (22%), with liver metastasis in 23% of recurred cases; b) Mesenchymal-like: diffuse tumors with worst prognosis, a tendency to occur at an earlier age and highest recurrence (63%) with peritoneal seeding in 64% of recurred cases, low frequency of molecular alterations; c) TP53-inactive with TP53 loss, presence of focal amplifications and chromosomal instability; d) TP53-active marked by EBV infection and PIK3CA mutations. more...

Organism:

Homo sapiens

Type:

Genome variation profiling by SNP array

Platform:

GPL6801

284 Samples

Download data: CEL, CSV, TSV, TXT

(Submitter supplied) Gastric cancer, a leading cause of cancer related deaths, is a heterogeneous disease, with little consensus on molecular subclasses and their clinical relevance. We describe four molecular subtypes linked with distinct patterns of molecular alterations, disease progression and prognosis viz. a) Microsatellite Instable: hypermutated intestinal subtype tumors occurring in antrum, best overall prognosis, lower frequency of recurrence (22%), with liver metastasis in 23% of recurred cases b) Mesenchymal-like: diffuse tumors with worst prognosis, a tendency to occur at an earlier age and highest recurrence (63%) with peritoneal seeding in 64% of recurred cases, low frequency of molecular alterations c) TP53-inactive with TP53 loss, presence of focal amplifications and chromosomal instability d) TP53-active marked by EBV infection and PIK3CA mutations. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL570

300 Samples

Download data: CEL

(Submitter supplied) The purpose of this study was to explore the possibility of classifying breast carcinomas based upon variations in gene expression patterns derived from cDNA microarrays, and to correlate tumor characteristics to clinical outcome. A total of 85 cDNA microarray experiments representing tumor and normal breast tissues from 78 individuals were analyzed by hierarchical-clustering. As reported previously, we identified a basal epithelial-like group, an ERBB2-overexpressing group and a normal breast-like group based on variations in gene expression. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

4 related Platforms

85 Samples

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(Submitter supplied) Abstract: Characteristic patterns of gene expression measured by DNA microarrays have been used to classify tumors into clinically relevant subgroups. In this study, we have refined the previously defined subtypes of breast tumors that could be distinguished by their distinct patterns of gene expression. A total of 115 malignant breast tumors were analyzed by hierarchical clustering based on patterns of expression of 534 "intrinsic" genes and shown to subdivide into one basal-like, one ERBB2-overexpressing, two luminal-like, and one normal breast tissue-like subgroup. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

8 related Platforms

167 Samples

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(Submitter supplied) Additional experiments used for intrinsic gene selection. Sorlie et al. Proc Natl Acad Sci U S A. 2001 Sep 11;98(19):10869-74. This Series accompanies Series GSE4335. Experiments that were used to make the "intrinsic" gene list from. Set of arrays organized by shared biological context, such as organism, tumors types, processes, etc. Keywords: Logical Set

Organism:

Homo sapiens

Type:

Expression profiling by array

5 related Platforms

45 Samples

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(Submitter supplied) Characterization of patterns of gene expression measured by cDNA microarrays to subclassify tumors into clinically relevant subgroups. In this study, we have refined the previously defined subtypes of breast tumors that could be distinguished by their distinct patterns of gene expression. A total of 115 malignant breast tumors and 7 benign tissues were analyzed by hierarchical clustering based on patterns of expression of 534 "intrinsic" genes and shown to subdivide into a basal epithelial-like, an ERBB2-overexpressing, two luminal epithelial-like and a normal breast tissue-like subgroup. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

7 related Platforms

122 Samples

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(Submitter supplied) Tumor-associated breast stroma was laser-capture microdissected from IDC breast cancer cases. The goal of the study was to characterize the heterogeneity of breast tumor-assocaited stroma and identify gene expression signatures predictive of clinical outcome. Keywords: disease state analysis

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL1708

123 Samples

Download data: TXT

(Submitter supplied) Microarrays were used to detail the global programme of gene expression underlying breast cancer cell lines. We identified two main groups of luminal-type and basal-type breast cancer cell lines by unsupervised Pearson correlation of breast cancer cell lines and intrinsic subtyping. Supervised analysis on spindle versus non-spindle breast cancer cell lines identified a spindle cell signature of 1,144 genes identifying all spindle, basal-type, E-cadherin methylated breast cancer cell lines.

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL96

39 Samples

Download data: CEL

(Submitter supplied) The nCounter miRGE™ assay was used to quantify transcript expression with a custom codeset containing probes for 123 endogenous mRNAs and 25 miRNAs to assess the association of genomic markers with long-term breast cancer survival. A total of 1,253 FFPE primary breast cancer samples with high-quality reads were obtained.

Organism:

Homo sapiens

Type:

Other

Platform:

GPL28286

1253 Samples

Download data: RCC, TXT

(Submitter supplied) The epidermal specific ablation of Trp53 gene leads to the spontaneous development of aggressive tumors in mice through a process that is accelerated by the simultaneous ablation of Rb gene. Since alterations of p53-dependent pathway are common hallmarks of aggressive, poor prognostic human cancers, these mouse models can recapitulate the molecular features of some of these human malignancies. To evaluate this possibility, gene expression microarray analysis was performed in mouse samples. more...

Organism:

Mus musculus

Type:

Expression profiling by array

Platform:

GPL1261

16 Samples

Download data: CEL

(Submitter supplied) The epidermal specific ablation of Trp53 gene leads to the spontaneous development of aggressive tumors in mice through a process that is accelerated by the simultaneous ablation of Rb gene. Since alterations of p53-dependent pathway are common hallmarks of aggressive, poor prognostic human cancers, these mouse models can recapitulate the molecular features of some of these human malignancies. To evaluate this possibility, gene expression microarray analysis was performed in mouse samples. more...

Organism:

Mus musculus

Type:

Expression profiling by array

Platform:

GPL1261

20 Samples

Download data: CEL

(Submitter supplied) Estrogen receptor (ER) expression and proliferative activity are established prognostic factors in breast cancer. In a search for additional prognostic motives we analyzed the gene expression patterns of 200 tumors of patients who were not treated by systemic therapy after surgery using a discovery approach. After performing hierarchical cluster analysis, we identified co-regulated genes related to the biological process of proliferation, steroid hormone receptor expression, as well as B cell and T cell infiltration. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL96

200 Samples

Download data: CEL

(Submitter supplied) Human breast tumours are diverse in their natural history and in their responsiveness to treatments. Variation in transcriptional programs accounts for much of the biological diversity of human cells and tumours. In each cell, signal transduction and regulatory systems transduce information from the cell's identity to its environmental status, thereby controlling the level of expression of every gene in the genome. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL20151

84 Samples

Download data: TXT

(Submitter supplied) Set of 65 surgical specimens of human breast tumors from 42 different individuals, using complementary DNA microarrays representing 8,102 human genes. Gene expression variation patterns within this set provided a distinctive molecular portrait of each tumor. Twenty of the tumors were sampled twice, before and after a 16-week course of doxorubicin chemotherapy, and two tumors were paired with a lymph node metastasis from the same patient. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL180

84 Samples

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