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GSE38255
Homo sapiens
8 Downloadable Samples
Affymetrix Human Exon 1.0 ST Array [probe set (exon) version (huex10st)
Description
Using measles virus induced T cell suppression as a model, we established that T cell inhibitory protein isoforms can be produced from alternatively spliced pre-mRNAs as a result of virus-mediated ablation of T cell receptor dependent activation of the phosphatidylinositol-3-kinase (PI3K). To asses production of alternative splice variants in response to PI3K abrogation in T cells at a whole cell level, we performed a Human Exon 1.0 ST Array on RNAs isolated from T cells stimulated only or stimulated after PI3K inhibition. We developed a simple algorithm based on a splicing index to detect genes that undergo alternative splicing (AS) or are differentially regulated (RG) on T cell suppression. Applying our algorithm on this model 9% of the genes were assigned as AS, while only 3% were attributed to RG. Though there are overlaps, AS and RG genes differed with regard to functional regulated at the level of AS or RG were found enriched in different functional groups with AS targeting e. g. extra cellular matrix (ECM)-receptor interaction and focal adhesion, while cytokine-receptor interaction, Jak-STAT and p53 pathways were mainly RG. When combined, AS/RG dependent alterations targeted pathways essential for T cell receptor signaling, cytoskeletal dynamics and cell cycle entry strongly supporting the notion that PI3K abrogations interferes with key T cell activation processes at both levels, and that candidates represented within both categories bear the potential to actively contribute to T cell suppression
Publication Title
Accumulation of splice variants and transcripts in response to PI3K inhibition in T cells.
Sample Metadata Fields
Specimen part, Treatment, Subject
View Samples- Caenorhabditis elegans
- 10 Downloadable Samples
Illumina HiSeq 2500
Description
In this study we have investigated the effect of loss of math-33 activity on DAF-16-mediated target gene regulation in C. elegans under conditions of reduced Insulin/IGF-1 signaling (IIS). Using whole nematode RNA sequencing experiments we found that the daf-2(e1370)-mediated induction and repression of DAF-16 target genes was decreased in daf-2(e1370); math-33(tm3561) mutant animals. Our data suggest that the downregulation of endogenous DAF-16 isoforms in the absence of a functional MATH-33 severely affects the global expression of DAF-16 targets when IIS activity is reduced. Therefore, MATH-33 is essential for DAF-16-mediated target gene activation and repression in the context of IIS. Overall design: DAF-16 mediated target gene regulation was analyzed in daf-2(e1370) nematodes and compared to daf-2(e1370); math-33(tm3561) mutant animals. daf-16(mu86); daf-2(e1370); N2 (wild type) and math-33(tm3561) single mutant animals were used as controls.
Publication Title
The Deubiquitylase MATH-33 Controls DAF-16 Stability and Function in Metabolism and Longevity.
Sample Metadata Fields
Specimen part, Subject
View Samples- Mus musculus
- 8 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
Although the cytokine-inducible transcription factors STAT5a/b promote proliferation of a wide range of cell types, there are cell- and context specific cases in which loss of STAT5a/b results in enhanced cell proliferation. Here we report that loss of STAT5a/b from mouse embryonic fibroblasts (MEFs) leads to enhanced proliferation, which was linked to reduced levels of the cell cycle inhibitor p15INK4B and p21CIP1. We further demonstrate that growth hormone through the transcription factor STAT5a/b enhances expression of the cdkn2B gene and that STAT5a binds to GAS sites within the promoter. We have recently demonstrated that ablation of STAT5a/b from liver results in hepatocellular carcinoma upon a CCl4 insult. We also established that in liver tissue, like in MEFs, STAT5a/b activates expression of the cdkn2B gene. Loss of STAT5a/b led to diminished p15INK4B and increased hepatocyte proliferation. This study for the first time demonstrates that cytokines through STAT5a/b can induce the expression of a key cell cycle inhibitor. These experiments therefore shed a light on the context-specific role of STAT5a/b as tumor suppressors.
Publication Title
The transcription factors signal transducer and activator of transcription 5A (STAT5A) and STAT5B negatively regulate cell proliferation through the activation of cyclin-dependent kinase inhibitor 2b (Cdkn2b) and Cdkn1a expression.
Sample Metadata Fields
Specimen part
View Samples- Mus musculus
- 4 Downloadable Samples
- Illumina HiSeq 2000
Description
Purpose: To characterize transcriptional changes associated with homozygous inactivation the Polycomb Repressive Complex 2 (PRC2) lysine methyltransferase Ezh2 in a mouse model of earlt T-cell precursor ALL (ETP-ALL) Methods: We sequenced mRNA from NRASQ61K transformed murine LSK-cells co-transduced with a self-inactivating Cre-vector. Cells were sorted for Cre-expression (lox-stop-loxRosa26-YFP) or expression of an inert control vector (GFP) and differentiated on OP9DL1 stroma with and without a functional Ezh2 gene. Results: Inactivation of Ezh2 in this model leads to accelerated leukemia development. Resulting gene expression changes are complex and include enrichment of genes associated with immature hematopoietic cells, Ras signaling and Cytokines and their cognate receptors. Conclusions: Inactivation of Ezh2 in our model leads to accentuated expression of early hematopoietic gene expression programs and to accentuated growth and survival signaling. Overall design: Examination of mRNA levels between Ezh2ff and Ezh2ko in vivo, Ezh2ff and Ezh2ko in vitro.
Publication Title
Ezh2 Controls an Early Hematopoietic Program and Growth and Survival Signaling in Early T Cell Precursor Acute Lymphoblastic Leukemia.
Sample Metadata Fields
Specimen part, Cell line, Subject
View Samples- Mus musculus
- 2 Downloadable Samples
- Illumina HiSeq 2000
Description
We sequenced mRNA from MLL-AF9 transformed Cdkn2ako murine LSK-cells with and without a functional Eed locus Overall design: Comparison of mRNA levels between Eed_ff/Cdkn2ako and Eed_ko/Cdkn2ako cells in vitro
Publication Title
Inactivation of Eed impedes MLL-AF9-mediated leukemogenesis through Cdkn2a-dependent and Cdkn2a-independent mechanisms in a murine model.
Sample Metadata Fields
No sample metadata fields
View Samples- Homo sapiens
- 24 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
We investigated the clinical implications of lung developmental transcription factors (TTF-1, NKX2-8, and PAX9) which we recently discovered as cooperating oncogenes activated by way of gene amplification at chromosome 14q13 in lung cancer. Using stable transfectants of human bronchial epithelial cells, RNA expression profiles (signatures) representing activation of the biological pathways defined by each of the three genes were determined and used to risk stratify a non-small cell lung cancer (NSCLC) clinical dataset consisting of ninety-one early stage tumors. Co-activation of the TTF-1 and NKX2-8 pathways identified a cluster of patients with poor survival, representing approximately 20% of patients with early stage NSCLC, whereas activation of individual pathways did not reveal significant prognostic power. Importantly, the poor prognosis associated with co-activation of TTF-1 and NKX2-8 was validated in two other independent clinical datasets. Further, lung cancer cell lines showing co-activation of the TTF-1 and NKX2-8 pathways were shown to exhibit resistance to cisplatin, the standard of care for the treatment of NSCLC. Since TTF-1 and NKX2-8 lack specific inhibitors at the current time, we explored an alternative therapeutic strategy. Using signatures of signaling pathway activation, we identified deregulation of specific oncogenic pathways (Ras and Myc) in the TTF-1/NKX2-8 co-activated cohort.
Publication Title
Characterizing the developmental pathways TTF-1, NKX2-8, and PAX9 in lung cancer.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 5 Downloadable Samples
- Illumina HiSeq 2000
Description
Purpose: To characterize transcriptional changes associated with homozygous inactivation of Dot1l or Mll1 in MN1 driven AML Methods: We sequenced mRNA from murine LSK-cells transformed using forced expression of MN1 (MSCV-MN1-IRES-GFP), and transduced with Cre-vector to inactivate either Dot1l or Mll1. Cells were sorted for Cre-expression (pTomato fluorescent marker) or expression of an inert control vector. Results: Inactivation of either Dot1l or Mll1 in this model leads to a substantial delay or complete abrogation of leukemia development.Loss of Dot1l or Mll1 are associated with gene expression changes that have substantial overlap. In addition, genes that are downregulated follwing inactivation of Dot1l or Mll1 have substantial overlap with the gene set upregulated in MN1 transduced CMPs. Conclusions: MN1 mediated leukemogenesis is associated with a gene expression program that dependes on Mll1 and Dot1l Overall design: Examination of mRNA levels between Dot1l f/f and Dot1l ko, and Mll1 f/f and Mll1 ko.
Publication Title
MLL1 and DOT1L cooperate with meningioma-1 to induce acute myeloid leukemia.
Sample Metadata Fields
Specimen part, Cell line, Subject
View Samples- Homo sapiens
- 4 Downloadable Samples
- IlluminaHiSeq2000
Description
Purpose: To characterize transcriptional changes associated with inhibition of Dot1l in 2 inv(16) patient AML samples Methods: We sequenced mRNA from patient samples that were exposed to 5 uM EPZ004777 or DMSO control for 7 days. Results: Inhibition of Dot1l leads to gene expression changes in genes related to cell growth and cell cycle. Overall design: Examination of mRNA levels between cells treated with 5 uM EPZ004777 or DMSO control
Publication Title
MLL1 and DOT1L cooperate with meningioma-1 to induce acute myeloid leukemia.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 21 Downloadable Samples
- Affymetrix Mouse Genome 430A 2.0 Array (mouse430a2)
Description
Analysis of undifferentiated pleomorphic sarcoma/malignant fibrous histiocytoma-like tumors from LSL-KrasG12D, p53Fl/Fl mouse model of soft tissue sarcoma.
Publication Title
Cross species genomic analysis identifies a mouse model as undifferentiated pleomorphic sarcoma/malignant fibrous histiocytoma.
Sample Metadata Fields
Specimen part
View Samples- Mus musculus
- 12 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
We compared gene expression profiles of Th cells, macrophages and monocytes isolated from the inflamed colon of colitis induced by the transfer of WT versus Tbx21-/- Th cells in Rag1-/- recipients.
Publication Title
T-bet expression by Th cells promotes type 1 inflammation but is dispensable for colitis.
Sample Metadata Fields
Specimen part
View Samples