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GSE17907
Homo sapiens
55 Downloadable Samples
Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
15-25% of breast cancers (BC) show ERBB2-amplification and overexpression of the encoded ERBB2 tyrosine kinase receptor. They are associated with a poor prognosis but can benefit from targeted therapy. A better knowledge of these BCs may help understand their behavior and design new therapeutic strategies. In this study, we defined the high resolution genome and gene expression profiles of 54 ERBB2-amplified BCs using 244K oligonucleotide array-comparative genomic hybridization and whole-genome DNA microarrays. We first identified the ERBB2-C17orf37-GRB7 genomic segment as the minimal common amplicon, and CRKRS and IKZF3 as the most frequent centromeric and telomeric amplicon borders, respectively. Second, we identified 17 genome regions affected by copy number aberration (CNA). The expression of 37 genes of these regions was deregulated. Third, two types of heterogeneity were observed in ERBB2-amplified BCs. The genomic profiles of estrogen receptor-postive (ER+) and negative (ER-) ERBB2-amplified BCs were different. The WNT/-catenin signaling pathway was involved in ER- ERBB2-amplified BCs, and PVT1 and TRPS1 were candidate oncogenes associated with ER+ ERBB2-amplified BCs. The size of the ERBB2-amplicon was different in inflammatory (IBC) and non inflammatory BCs. ERBB2-amplified IBCs were characterized by the downregulated and upregulated mRNA expression of ten and two genes in proportion to CNA, respectively. We have shown that ERBB2 BCs are heterogeneous and identified genomic features that may be useful in the design of therapeutical strategies
Publication Title
Genome profiling of ERBB2-amplified breast cancers.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 6 Downloadable Samples
- Affymetrix Mouse Gene 1.0 ST Array (mogene10st)
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
Embryonic stem cell potency fluctuates with endogenous retrovirus activity.
Sample Metadata Fields
Specimen part, Cell line, Treatment
View Samples- Mus musculus
- 6 Downloadable Samples
- Affymetrix Mouse Gene 1.0 ST Array (mogene10st)
Description
We compared gene expression from 2C::tomato+/- ES cells from Kdm1a wt and mutant ES cultures
Publication Title
Embryonic stem cell potency fluctuates with endogenous retrovirus activity.
Sample Metadata Fields
Cell line
View Samples- Drosophila melanogaster
- 6 Downloadable Samples
- Affymetrix Drosophila Genome Array (drosgenome1)
Description
The highly conserved Epidermal Growth Factor-receptor (Egfr) pathway is required in all animals for normal development and homeostasis; consequently, aberrant Egfr signaling is implicated in a number of diseases. Genetic analysis of Drosophila melanogaster Egfr has contributed significantly to understanding this conserved pathway and has led to the discovery of new components and targets. Here we used microarray analysis of Drosophila third instar wing discs, in which Egfr signaling was perturbed, to identify new Egfr-responsive genes. Upregulated transcripts included five known targets suggesting the approach was valid. We investigated the function of 29 previously uncharacterized genes, which had pronounced responses. The Egfr pathway is important for wing-vein patterning and using reverse genetic analysis we identified five genes that showed venation defects. Three of these genes are expressed in vein primordia and all showed transcriptional changes in response to altered Egfr activity consistent with being targets of the pathway. Genetic interactions with Egfr further linked two of the genes, Sulfated (Sulf1), an endosulfatase gene, and CG4096, an ADAMTS (A Disintegrin And Metalloproteinase with ThromboSpondin motifs) gene, to the pathway. Sulf1 showed a strong genetic interaction with the neuregulin-like ligand vein (vn) and may influence binding of Vn to heparan-sulfated proteoglycans (HSPGs). Genetic evidence also shows that CG4096 functions by modulating activity of the Egfr ligands. The substrate(s) and how ligand activity is affected are unknown, but interestingly vertebrate EGF ligands are regulated by a related ADAMTS protein. We conclude Sulf1 and CG4096 are negative feedback regulators of Egfr signaling that function in the extracellular space to influence ligand activity.
Publication Title
New negative feedback regulators of Egfr signaling in Drosophila.
Sample Metadata Fields
Specimen part
View Samples- Mus musculus
- 3 Downloadable Samples
Illumina HiSeq 2000
Description
To determine gene expression in 2 cell stage embryos Overall design: 3 Replicates of litters of wild type 2 cell stage embryos
Publication Title
Embryonic stem cell potency fluctuates with endogenous retrovirus activity.
Sample Metadata Fields
Specimen part, Subject
View Samples- Mus musculus
- 2 Downloadable Samples
- Illumina HiSeq 2000
Description
To measure gene expression difference between wt and g9A knockout ES cells Overall design: G9A TT2 ES cells (Yokochi et al) were treated with Veh. Or 4OHT (to delete G9A)
Publication Title
Embryonic stem cell potency fluctuates with endogenous retrovirus activity.
Sample Metadata Fields
Specimen part, Treatment, Subject
View Samples- Mus musculus
- 2 Downloadable Samples
- Illumina Genome Analyzer II
Description
We identified/quantified genes and repeat elements enriched within 2C::tomato+ cells vs. 2C::tomato - cells Overall design: 2C::tomato + and - cells were collected by FACS for RNA-Seq analysis
Publication Title
Embryonic stem cell potency fluctuates with endogenous retrovirus activity.
Sample Metadata Fields
Specimen part, Subject
View Samples- Mus musculus
- 4 Downloadable Samples
- Illumina HiSeq 2000
Description
This experiment was designed to indentify RNAs making direct contact with EZH2 in mouse embryonic stem cells Overall design: E14 with an integrated transgene encoding HA-EZH2 were pulsed with 4-SU, irradiated with UV, and subjected to HA immunoprecipitation.
Publication Title
PRC2 binds active promoters and contacts nascent RNAs in embryonic stem cells.
Sample Metadata Fields
Cell line, Subject
View Samples- Mus musculus
- 2 Downloadable Samples
- Illumina HiSeq 2000
Description
This experiment was designed to obtain the polyA+ transcriptome in E14 ESCs Overall design: PolyA+ RNA was extracted and purified from two separate clones of E14, which were treated as biological replicate
Publication Title
PRC2 binds active promoters and contacts nascent RNAs in embryonic stem cells.
Sample Metadata Fields
Cell line, Subject
View Samples- Mus musculus
- 14 Downloadable Samples
- Illumina HiSeq 2500, Illumina HiSeq 2000
Description
We investigated microRNA expression in motoneurons by performing small RNA sequencing of fluorescence-activated cell sorting (FACS)-isolated motoneurons labelled with the Hb9:gfp transgenic reporter and Hb9:gfp negative non-motoneurons including spinal interneurons. We find that one microRNA, microRNA-218, is highly enriched and abundantly expressed in motoneurons. Furthermore, we find that miR-218 is transcribed from alternative, motoneuron-specific alternative promoters embedded within the Slit2 and Slit3 genes by performing RNA sequencing of FACS-isolated motoneurons and a dissected embryonic floor plate cells which served as a control. Next, we performed RNA sequencing of FACS-isolated wild type (WT) motoneurons and motoneurons lacking miR-218 expression (218DKO motoneurons), and find that a large set of genes (named ''TARGET218'' genes) with predicted miR-218 binding sites are de-repressed in the absence of miR-218 expression. Finally, we examine the expression of TARGET218 genes in other neuronal subpopulations by FACS-isolating V1, V2a, and V3 interneurons expressing Cre-inducible fluorescent reporters and performing RNA sequencing. We find that the TARGET218 network of genes is depleted in wild-type motoneurons versus these interneuron types. Additionally, these genes are expressed at similar levels in 218DKO motoneurons compared with interneuron subtypes, suggesting that this genetic network. Overall design: Examination of mRNA expression in spinal progenitor, glial, and neuronal subpopulations.
Publication Title
Loss of motoneuron-specific microRNA-218 causes systemic neuromuscular failure.
Sample Metadata Fields
Specimen part, Subject
View Samples