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GSE71272
Homo sapiens
12 Downloadable Samples
Affymetrix Human Gene 1.1 ST Array (hugene11st)
Description
The objective of this study was to determine the extent to which paracrine action of 17-beta-estradiol on ER+ mouse astrocytes, affect gene expression of MDA231-derived brain trophic 231BR cells.
Publication Title
No associated publication
Sample Metadata Fields
Cell line, Treatment
View Samples- Homo sapiens
- 10 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
Luminal breast cancers express estrogen (ER) and progesterone (PR) receptors, and respond to endocrine therapies. However, some ER+PR+ tumors display intrinsic or acquired resistance, possibly related to PR. Two PR isoforms, PR-A and PR-B, regulate distinct gene subsets that may differentially influence tumor fate. A high PR-A:PR-B ratio is associated with poor prognosis and tamoxifen resistance. We speculate that excessive PR-A marks tumors that will relapse early. Here we address mechanisms by which PR-A regulate transcription, focusing on SUMOylation. We use receptor mutants and synthetic promoter/reporters to show that SUMOylation deficiency or the deSUMOylase SENP1 enhance transcription by PR-A, independent of the receptors dimerization interface or DNA binding domain. De-SUMOylation exposes the agonist properties of the antiprogestin RU486. Thus, on synthetic promoters, SUMOylation functions as an independent brake on transcription by PR-A. What about PR-A SUMOylation of endogenous human breast cancer genes? To study these, we used gene expression profiling. Surprisingly, PR-A SUMOylation influences progestin target genes differentially, with some upregulated, others downregulated, and others unaffected. Hormone-independent gene regulation is also PR-A SUMOylation dependent. Several SUMOylated genes were analyzed in clinical breast cancer database. In sum, we show that SUMOylation does not simply repress PR-A. Rather, it regulates PR-A activity in a target selective manner including genes associated with poor prognosis, shortened survival, and metastasis.
Publication Title
SUMOylation Regulates Transcription by the Progesterone Receptor A Isoform in a Target Gene Selective Manner.
Sample Metadata Fields
Specimen part, Treatment
View Samples- Homo sapiens
- 129 Downloadable Samples
- Illumina HumanHT-12 V4.0 expression beadchip
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
Genome-wide identification of expression quantitative trait loci (eQTLs) in human heart.
Sample Metadata Fields
Sex, Age, Specimen part
View Samples- Homo sapiens
- 129 Downloadable Samples
- Illumina HumanHT-12 V4.0 expression beadchip
Description
In recent years genome-wide association studies (GWAS) have uncovered numerous chromosomal loci associated with various electrocardiographic traits and cardiac arrhythmia predisposition. A considerable fraction of these loci lie within inter-genic regions. Trait-associated SNPs located in putative regulatory regions likely exert their effect by modulating gene expression. Hence, the key to unraveling the molecular mechanisms underlying cardiac traits is to interrogate variants for association with differential transcript abundance by expression quantitative trait locus (eQTL) analysis. In this study we conducted an eQTL analysis of human heart. To this end, left ventricular mycardium samples from non-diseased human donor hearts were hybridized to Illumina HumanOmniExpress BeadChips for genotyping (n = 129) and Illumina Human HT12 Version 4 BeadChips (n = 129) for transcription profiling.
Publication Title
Genome-wide identification of expression quantitative trait loci (eQTLs) in human heart.
Sample Metadata Fields
Sex, Age, Specimen part
View Samples- Mus musculus
- 24 Downloadable Samples
- Illumina MouseRef-8 v2.0 expression beadchip
Description
The intact intestinal epithelial barrier protects our body from a range of immune mediated diseases. The epithelial layer has an impressive ability to reconstitute and repair upon damage and this process of repair is increasingly seen as a therapeutic target. In vitro models to study this process in primary intestinal cells are lacking. Therefore we established and characterized an in vitro model of intestinal damage and repair by applying γ-radiation on small intestinal organoids. We then used this model to identify novel regulators of intestinal regeneration.
Publication Title
No associated publication
Sample Metadata Fields
Specimen part, Time
View Samples- Homo sapiens
- 19 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
Response to allergen was studied in epithelial cells derived from allergic pantients and from healthy controls. Cells were cultured after isolation from a nasal biopsy. Cells were exposed to Housed dust mite or vessel (saline)
Publication Title
Primary nasal epithelium exposed to house dust mite extract shows activated expression in allergic individuals.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 20 Downloadable Samples
- Affymetrix Mouse Clariom S Array (clariomsmouse)
Description
In colorectal cancer, the role of the most common driver mutations in APC, KRAS, SMAD4 and TP53, on global mRNA translation are incompletely understood. To adress this, we generated and characterised mouse intestinal organoid models with oncogenic mutations in each of these genes using Cre-Lox recombination in ex vivo organoid cultures combined with stable expression of short hairpin RNAs. Microarray analysis was used to characterise transcriptomic reprogramming that supports altered global translation rates in mutant cells.
Publication Title
No associated publication
Sample Metadata Fields
Specimen part
View Samples- Mus musculus
- 16 Downloadable Samples
- Affymetrix Mouse Clariom S Array (clariomsmouse)
Description
AP1 transcription factor family members: activating transcription factor 2 (ATF2) and activating transcription factor 7 (ATF7) have highly redundant functions due to homology and hence overlapping DNA-binding sites. The role of these transcription factors in intestinal epithelial homeostasis and repair has not been critically examined. Here, by using an intestine-specific deletion of ATF2 combined with body wide deletion of ATF7 in mice we assess the role of these proteins during intestinal homeostasis and repair after inflammation.
Publication Title
No associated publication
Sample Metadata Fields
Specimen part, Treatment
View Samples- Mus musculus
- 16 Downloadable Samples
- Illumina MouseRef-8 v2.0 expression beadchip
Description
This experiment was performed to assess the effect of loss of Hnf4a in the intestinal epithelium on the regeneration process after irradiation. Intestinal epithelium specific knockout was obtained by oral adminstration of tamoxifen to VillinCreERT2+-Hnf4afl/fl mice and VillinCreERT2--Hnf4afl/fl mice (which served as controls). 3 weeks after the tamoxifen administration, mice received 14 Gy whole-body gamma-irradiation. RNA was extracted from small intestinal tissue 96 hours after irradiation.
Publication Title
No associated publication
Sample Metadata Fields
Specimen part, Time
View Samples- Homo sapiens
- 9 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
siRNA mediated gene knockdown has been shown to be extremely sequence specific. However, off-target gene regulation due to partial sequence homology has also been reported. Furthermore, sequence unrelated effects on gene regulation can occur when siRNA is applied in vivo. In this experiment we investigated off target gene regulation due to treatment of mice with siRNA and LNA modified siRNA targeting GFP. Off target gene regulation was observed and was markedly reduced upon introduction of LNA modifiecation in siRNA.
Publication Title
No associated publication
Sample Metadata Fields
No sample metadata fields
View Samples