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Mus musculus
6 Downloadable Samples
Affymetrix Mouse Gene 1.0 ST Array (mogene10st)
Description
Mesenchymal stromal cells (MSCs) are used extensively in clinical trials; however, the potential for malignant transformation of MSCs has been raised. We examined the genomic stability versus the tumor forming capacity of multiple mouse MSCs. Murine MSCs have been shown to be less stable and more prone to malignant transformation than their human counterparts. A large series of independently isolated MSC populations exhibited low tumorigenic potential under syngeneic conditions, which increased in immune-compromised animals. Unexpectedly, higher ploidy correlated with reduced tumor forming capacity. Furthermore, in both cultured MSCs and primary hepatocytes, polyploidization was associated with a dramatic decrease in the expression of the long non-coding RNA H19. Direct knockdown of H19 expression in diploid cells resulted in acquisition of polyploid cell traits. Moreover, artificial tetraploidization of diploid cancer cells led to a reduction of H19 levels, as well as to an attenuation of the tumorigenic potential. Polyploidy might therefore serve as a protective mechanism aimed at reducing malignant transformation through the involvement of the H19 regulatory long non-coding RNA.
Publication Title
Polyploidization of murine mesenchymal cells is associated with suppression of the long noncoding RNA H19 and reduced tumorigenicity.
Sample Metadata Fields
Specimen part
View Samples- Homo sapiens
- 8 Downloadable Samples
- Affymetrix Human Genome U133A 2.0 Array (hgu133a2)
Description
Tumors contain a fraction of cancer stem cells that maintain the propagation of the disease. The CD34CD38_ cells, isolated from acute myeloid leukemia (AML), were shown to be enriched leukemic stem cells (LSC). We isolated the CD34CD38_ cell fraction from AML and compared their gene expression profiles to the CD34CD38 cell fraction, using microarrays. We found 409 genes that were at least twofold over- or underexpressed between the two cell populations. These include underexpression of DNA repair, signal transduction and cell cycle genes, consistent with the relative quiescence of stem cells, and chromosomal aberrations and mutations of leukemic cells. Comparison of the LSC expression data to that of normal hematopoietic stem cells (HSC) revealed that 34% of the modulated genes are shared by both LSC and HSC, supporting the suggestion that the LSC originated within the HSC progenitors. We focused on the Notch pathway since Jagged-2, a Notch ligand was found to be overexpressed in the LSC samples. We show that DAPT, an inhibitor of gamma-secretase, a protease that is involved in Jagged and Notch signaling, inhibits LSC growth in colony formation assays. Identification of additional genes that regulate LSC self-renewal may provide new targets for therapy.
Publication Title
Gene expression profiles of AML derived stem cells; similarity to hematopoietic stem cells.
Sample Metadata Fields
Specimen part
View Samples- Rattus norvegicus
- 9 Downloadable Samples
- Affymetrix Rat Gene 2.0 ST Array (ragene20st)
Description
The goal of this experiment was to investigate the molecular mechanism of how Set-beta regulates neurite growth. Set-betas subcellular localization is regulated by posttranslational modifications. We found that Set-beta suppresses neurite growth of purified postnatal rat retinal ganglion cell (RGC) primary neurons when it is overexpressed in the nucleus, whereas recruiting Set-beta to cellular membrane by fusing myr-tag to its N-terminus promotes neurite growth. Here, we transfected purified by immunopanning postnatal rat RGC with wild-type Set-beta which localizes to the nucleus, myr-Set-beta which is recruited to cellular membranes, and mCherry control, and analyzed with microarrays Set-betas subcellular localization-dependent effects on gene expression. We found that wild-type Set- regulated expression of significantly more genes than myr-Set-, consistent with wild-type Set-s nuclear localization and previously described roles in regulating transcription. These data reveal potential downstream gene effectors regulating neurite growth, and specific candidate genes could be validated and tested in future experiments.
Publication Title
Regulating Set-β's Subcellular Localization Toggles Its Function between Inhibiting and Promoting Axon Growth and Regeneration.
Sample Metadata Fields
Specimen part
View Samples- Homo sapiens
- 332 Downloadable Samples
- Illumina HumanHT-12 V4.0 expression beadchip
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
Host Transcription Profile in Nasal Epithelium and Whole Blood of Hospitalized Children Under 2 Years of Age With Respiratory Syncytial Virus Infection.
Sample Metadata Fields
Sex, Age, Specimen part, Disease, Disease stage
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SRP072687- Homo sapiens
- 6 Downloadable Samples
Illumina HiSeq 2000
Description
HEK293 cells were heatshocked and differentially expressed transcripts were identified Overall design: Transcriptomes of heatshocked HEK293 cells were compared to control cells. Heatshock and control samples were treated and sequenced in triplicate.
Publication Title
RNA Directed Modulation of Phenotypic Plasticity in Human Cells.
Sample Metadata Fields
Cell line, Subject
View Samples- Homo sapiens
- 8 Downloadable Samples
- Affymetrix Human Genome U133A Array (hgu133a)
Description
Effect of sulforaphane (SF) on human colon caco-2 cells after 24h treatment
Publication Title
Transcriptome analysis of human colon Caco-2 cells exposed to sulforaphane.
Sample Metadata Fields
Specimen part, Disease, Disease stage, Cell line, Compound
View Samples- Homo sapiens
- 109 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
Global microarray (HG U133 Plus 2.0) was used to investigate the effects of resistance exercise and resistance training on the skeletal muscle transcriptome profile of 28 young and old adults. Vastus lateralis muscle biopsies were obtained pre and 4hrs post resistance exercise in the beginning (untrained state) and at the end (trained state) of a 12 wk progressive resistance training program.
Publication Title
Transcriptome signature of resistance exercise adaptations: mixed muscle and fiber type specific profiles in young and old adults.
Sample Metadata Fields
Sex, Specimen part, Time
View Samples- Homo sapiens
- 70 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
Global microarray (HG U133 Plus 2.0) was used for the first time to investigate the effects of resistance exercise on the transcriptome in slow-twitch myosin heavy chain (MHC) I and fast-twitch MHC IIa muscle fibers of young and old women. Vastus lateralis muscle biopsies were obtained pre and 4hrs post resistance exercise in the beginning (untrained state) and at the end (trained state) of a 12 wk progressive resistance training program.
Publication Title
Transcriptome signature of resistance exercise adaptations: mixed muscle and fiber type specific profiles in young and old adults.
Sample Metadata Fields
Sex, Specimen part, Subject, Time
View Samples- Homo sapiens
- 34 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
Global microarray (HG U133 Plus 2.0) was used to investigate the basal level skeletal muscle transcriptome profile of young and old adults. One vastus lateralis muscle biopsy was obtained in the basal state from 36 different subjects.
Publication Title
Transcriptome signature of resistance exercise adaptations: mixed muscle and fiber type specific profiles in young and old adults.
Sample Metadata Fields
Sex, Specimen part
View Samples- Gallus gallus
- 24 Downloadable Samples
- Affymetrix Chicken Genome Array (chicken)
Description
In the present study, we examined the hepatic transcriptome of chickens during the peri-hatch periodor the metabolic jump from chorioallantoic (embryo) to pulmonary (hatchling) respiration. Although our major interest was comparison of differentially-expressed genes between embryos and hatchlings, we made pairwise contrasts across six developmental ages. We collected the liver from four embryos at three ages (e16, e18 and e20) and four hatchling chicks at three ages (1, 3 and 9 days) post hatching. Liver samples (N=24) were used for extraction of total RNA which was then used for hybridization to 24 Affymetrix Chicken Genome Arrays. Ingenuity Pathways Analysis was used for functional annotation and mapping of differentially expressed (FDR0.05) genes to canonical pathways and gene interaction networks. We identified 1274 hepatic genes that were differentially expressed between embryos and hatchling chicks and of these, 284 genes are involved in lipid metabolism. The three most abundant found in liver of embryos were (MOGAT1, DIO3 and PDK4), whereas THRSP, FASN and DIO2 were greatly expressed in liver of hatchlings. Two functionally-distinct clusters of hepatic genes have emerged from our time-course transcriptional scans in the peri-hatch chicken. Cluster A genes are largely lipolytic with higher expression in the embryo, while Cluster B genes are mainly lipogenic and thermogenic with greater expression in liver of hatchlings. The present study describes the innate chorography of transcriptional responses of liver to the abrupt metabolic switch from aquatic ectothermy (embryos) to free-living endothermy (hatchling chicks).
Publication Title
Transcriptional profiling of liver during the critical embryo-to-hatchling transition period in the chicken (Gallus gallus).
Sample Metadata Fields
Sex, Specimen part
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