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GSE17050
Rattus norvegicus
10 Downloadable Samples
Illumina ratRef-12 v1.0 expression beadchip
Description
Aortic valve regurgitation (AR) imposes a severe volume overload to the left ventricle (LV) which results in dilation, eccentric hypertrophy and eventually loss of function. Little is known about the impact of AR on LV gene expression. We therefore conducted a gene expression profiling study in the LV of male Wistar rats with chronic (9 months) and severe AR.
Publication Title
Multiple short-chain dehydrogenases/reductases are regulated in pathological cardiac hypertrophy.
Sample Metadata Fields
Sex
View Samples- Homo sapiens
- 57 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
We have carried out transcriptional profile analysis in macroH2A knockdown cells (Namalwa B cells and HeLa cells) and demonstrated that this histone variant plays positive and negative roles in transcription. We also demonstrated the role of macroH2A in regulating the response to Sendai Virus infection.
Publication Title
Composite macroH2A/NRF-1 Nucleosomes Suppress Noise and Generate Robustness in Gene Expression.
Sample Metadata Fields
Cell line, Treatment
View Samples- Mus musculus
- 37 Downloadable Samples
- Affymetrix Mouse Expression 430A Array (moe430a)
Description
We performed a factorial experiment examining the effects of calorie restriction (CR) and exercise (EX) in mice. CR mice received 70% of calories but 100% of all other nutrients compared to AL mice. Food consumption, weight gain, and physical activity levels were recorded for 6 weeks.
Publication Title
Distinct effects of calorie restriction and exercise on mammary gland gene expression in C57BL/6 mice.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 24 Downloadable Samples
NextSeq 500, Illumina HiSeq 2000
Description
STAT5 interacts with other factors to control transcription, and the mechanism of regulation is of interest as constitutive active STAT5 has been reported in malignancies. Here LSD1 and HDAC3 were identified as novel STAT5a interacting partners in pro-B cells. Characterization of STAT5a, LSD1 and HDAC3 target genes by ChIP-seq and RNA-seq revealed gene subsets regulated by independent or combined action of the factors and LSD1/HDAC3 to play dual role in their activation or repression. Genes bound by STAT5a alone or in combination with weakly associated LSD1 or HDAC3 were enriched for the canonical STAT5a dimer motif, and such binding induced activation or repression. Strong STAT5 binding was seen more frequently in intergenic regions, which might function as distal enhancer elements. Genes bound weakly by STAT5a and strongly by LSD1/HDAC3 present a STAT5a monomer like motif, and are differentially regulated based on their biological role, genomic binding localization and affinity. STAT5a binding in monomer like motifs was found with increased frequency in promoters, indicating a requirement for stabilization by additional factors, which might recruit LSD1/HDAC3. Our study describes an interaction network of STAT5a/LSD1/HDAC3 and a dual function of LSD1/HDAC3 on STAT5-dependent transcription, defined by protein-protein interactions, genomic binding positions-affinities and motifs. Overall design: Mouse pro-B Ba/F3 cells treated with lentiviral vectors expressing short-hairpins to knock-down various genes (STAT5a, STAT5b, LSD1 and HDAC3). All KDs were analysed versus cells treated with lentiviral construct expressing a No-Target short-hairpin at the same condition (either minus [IL3 deprivation for 6h] or plus [IL3 deprivation for 6h and IL3 stimulation for 30min]). Wild-type cells were also generated and compared between the two conditions. All samples contain biological replicates (3-5 depending on the sample).
Publication Title
The dual role of LSD1 and HDAC3 in STAT5-dependent transcription is determined by protein interactions, binding affinities, motifs and genomic positions.
Sample Metadata Fields
Cell line, Treatment, Subject
View Samples- Homo sapiens
- 4 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
The human seminal plasma is a potential source of biomarkers for male reproductive disorders. A tissue-profiling analysis of the main organs participating in the secretion of this body fluid was conducted to identify tissue-specific genes along the male reproductive tract.
Publication Title
Identification of genital tract markers in the human seminal plasma using an integrative genomics approach.
Sample Metadata Fields
Specimen part
View Samples- Mus musculus
- 8 Downloadable Samples
- Illumina HiSeq 2000
Description
To identify genes affected by mutant huntington protein, we performed mRNA-seq experiments with Striatal STHdh Q7/Q7, Q7Q111, and Q111/Q111 cells. We also tested the effect of Sp1 overexpression on rescuing gene expression in Q111/Q111 cells. Overall design: Striatal STHdh Q7/Q7, Q7/Q111 and Q111/Q111 cells were used for the mRNA-seq in replicates. After Sp1 transient overexpression in Q111/Q111 cells, cells were collected for mRNA-seq analysis.
Publication Title
Real-time imaging of Huntingtin aggregates diverting target search and gene transcription.
Sample Metadata Fields
Specimen part, Cell line, Subject
View Samples- Macaca mulatta
- 78 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
The hippocampus is part of a brain network essential for memory function. Paradoxically, the hippocampus is also the brain structure that is most sensitive to hypoxic-ischemic episodes. Here we show that the expression of genes associated with glycolysis and glutamate metabolism in astrocytes and the coverage of excitatory synapses by astrocytic processes undergo significant decreases in the CA1 field of the monkey hippocampus during postnatal development. Given the established role of astrocytes in the regulation of glutamate concentration in the synaptic cleft, our findings indicate that a developmental decrease in astrocytic processes underlies the selective vulnerability of CA1 during hypoxic-ischemic episodes in adulthood, its decreased susceptibility to febrile seizures with age, as well as contribute to the emergence of selective, adult-like memory function.
Publication Title
Developmental regulation of gene expression and astrocytic processes may explain selective hippocampal vulnerability.
Sample Metadata Fields
Specimen part
View Samples- Homo sapiens
- 8 Downloadable Samples
- Affymetrix Human Genome U133A Array (hgu133a)
Description
Allergic asthma is a complex trait. Several approaches have been used to identify biomarkers involved in this disease. This study aimed at demonstrating the relevance and validity of microarrays in the definition of allergic asthma expression pattern. The authors compared the transcript expressions of bronchial biopsy of 2 different microarray experiments done 2 years apart, both including nonallergic healthy and allergic asthmatic subjects (n = 4 in each experiment). U95Av2 and U133A GeneChips detected respectively 89 and 40 differentially expressed genes. Fifty-five percent of the U133A genes were previously identified with the U95Av2 arrays. The immune signaling molecules and the proteolytic enzymes were the most preserved categories between the 2 experiments, because 3/4 of the genes identified by the U133A were also significant in the U95Av2 study for both categories. These results demonstrate the relevance of microarray experiments using bronchial tissues in allergic asthma. The comparison of these GeneChip studies suggests that earlier microarray results are as relevant as actual ones to target new genes of interest, particularly in function categories linked to the studied disease. Moreover, it demonstrates that microarrays are a valuable technology to target novel allergic asthma pathways as well as biomarkers.
Publication Title
A comparison of two sets of microarray experiments to define allergic asthma expression pattern.
Sample Metadata Fields
Specimen part, Disease
View Samples- Mus musculus
- 6 Downloadable Samples
- Affymetrix Mouse Gene 1.0 ST Array (mogene10st)
Description
Exogenous 17-estradiol (E2) accelerates the progression of ovarian cancer in the transgenic tgCAG-LS-TAg mouse model of the disease. We hypothesized that E2 has direct effects on ovarian cancer cells and this study was designed to determine the molecular mechanisms by which E2 accelerates ovarian tumour progression. Mouse ovarian cancer ascites (MASE2) cell lines were derived from tgCAG-LS-TAg mice. Following intraperitoneal engraftment of MASE2 into SCID mice, exogenous E2 significantly decreased the survival time and increased the tumour burden.
Publication Title
17β-estradiol upregulates GREB1 and accelerates ovarian tumor progression in vivo.
Sample Metadata Fields
No sample metadata fields
View Samples- Homo sapiens
- 12 Downloadable Samples
- Affymetrix Human Genome U95 Version 2 Array (hgu95av2)
Description
Asthma pathogenesis and susceptibility involves a complex interplay between genetic and environmental factors.
Publication Title
Functional classes of bronchial mucosa genes that are differentially expressed in asthma.
Sample Metadata Fields
Sex, Specimen part
View Samples