Sequencing data from control and PTEN-deficient mouse brain microvascular transcriptomes
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE112373 | GEO | 2019/03/30
REPOSITORIES: GEO
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Project description:sequencing data from control and PTEN-deficient mouse brain microvascular transcriptomes
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Project description:The blood-brain barrier (BBB) consists of specific physical barriers, enzymes and transporters, which together maintain the necessary extracellular environment of the central nervous system (CNS). The main physical barrier is found in the CNS endothelial cell, and depends on continuous complexes of tight junctions combined with reduced vesicular transport. Other possible constituents of the BBB include extracellular matrix, astrocytes and pericytes, but the relative contribution of these different components to the BBB remains largely unknown. Here we demonstrate a direct role of pericytes at the BBB in vivo. Using a set of adult viable pericyte-deficient mouse mutants we show that pericyte deficiency increases the permeability of the BBB to water and a range of low-molecular-mass and high-molecular-mass tracers. The increased permeability occurs by endothelial transcytosis, a process that is rapidly arrested by the drug imatinib. Furthermore, we show that pericytes function at the BBB in at least two ways: by regulating BBB-specific gene expression patterns in endothelial cells, and by inducing polarization of astrocyte end-feet surrounding CNS blood vessels. Our results indicate a novel and critical role for pericytes in the integration of endothelial and astrocyte functions at the neurovascular unit, and in the regulation of the BBB. The brain microvascular fragments were isolated from mice with different genotypes, each represented by 3-4 biological replicates. Genotypes 1-2: Platelet derived growth factor-B (PDGF-B) retention-motif knockout (pdgfbret/ret) represent the pericyte-deficient situation, and the heterozygous mice (pdgfbret/+) are used as controls. Genotypes 3-4: Hypomorphic PDGF-B mutants that rescue pdgfb-/- null mice, in which a one copy of a conditionally silent human PDGF-B transgene targeted to the Rosa 26 locus (R26P) is turned on by endothelial-specific expression of Cre recombinase. In this data set these mice are named as Tie2Cre, R26P+/0, pdgfb-/- (representing the pericyte-deficient situation). Mice wt for pdgfb (pdgfb+/+) and carrying one silent copy of R26P (R26P+/0), are used as controls. Genotype 5: Adult Notch3+/+ wildtype (WT).
2010-10-21 | E-GEOD-15892 | biostudies-arrayexpress
Project description:PTEN is a tumor suppressor that is often inactivated in cancer and possesses both lipid and protein phosphatase activities. We report the metabolic regulator PDHK1 (pyruvate dehydrogenase kinase1) is a synthetic-essential gene in PTEN-deficient cancer and normal cells. The predominant mechanism of PDHK1 regulation and dependency is the PTEN protein phosphatase dephosphorylates NFkB activating protein (NKAP) and limits NFkB activation to suppress expression of PDHK1, a NFkB target gene. Loss of the PTEN protein phosphatase upregulates PDHK1 to drive aerobic glycolysis and induce PDHK1 cellular dependence. PTEN-deficient human tumors harbor increased PDHK1, which is a biomarker of decreased patient survival, establishing clinical relevance. This study uncovers a PTEN-regulated signaling pathway and reveals PDHK1 as a potential target in PTEN-deficient cancers.
2019-09-09 | PXD014707 | Pride
Project description:The blood-brain barrier (BBB) consists of specific physical barriers, enzymes and transporters, which together maintain the necessary extracellular environment of the central nervous system (CNS). The main physical barrier is found in the CNS endothelial cell, and depends on continuous complexes of tight junctions combined with reduced vesicular transport. Other possible constituents of the BBB include extracellular matrix, astrocytes and pericytes, but the relative contribution of these different components to the BBB remains largely unknown. Here we demonstrate a direct role of pericytes at the BBB in vivo. Using a set of adult viable pericyte-deficient mouse mutants we show that pericyte deficiency increases the permeability of the BBB to water and a range of low-molecular-mass and high-molecular-mass tracers. The increased permeability occurs by endothelial transcytosis, a process that is rapidly arrested by the drug imatinib. Furthermore, we show that pericytes function at the BBB in at least two ways: by regulating BBB-specific gene expression patterns in endothelial cells, and by inducing polarization of astrocyte end-feet surrounding CNS blood vessels. Our results indicate a novel and critical role for pericytes in the integration of endothelial and astrocyte functions at the neurovascular unit, and in the regulation of the BBB.
2010-10-21 | GSE15892 | GEO
Project description:Expression data of PTEN deficient PKO cells
| PRJNA975844 | ENA
Project description:T cell-specific deletion of PTEN induces premalignancy in CD4+ CD8+ (DP) immature T cells in the thymus, which progresses to the development of mature CD4+ T cell lymphomas in the lymph nodes and spleen. As part of a screen to identify factors that inhibit progression to malignancy, we compared miRNA expression in premalignant PTEN-deficient DP thymocytes versus wild-type controls. DP thymocytes were collected by cell sorting from three 9-week-old, premalignant T cell-specific PTEN-deficient mice (tPTEN-/-) and three littermate controls. miRNA expression was assessed relative to a reference pool generated from an equal mixture of all samples.
2014-04-12 | E-GEOD-56759 | biostudies-arrayexpress
Project description:Loss of the PTEN tumor suppressor is one of the most common oncogenic drivers across all cancer types. PTEN is the major negative regulator of phosphoinositide-3 kinase (PI3K) signaling. Notably, the PI3Kβ isoform has been shown to play an important role in PTEN-deficient tumors, but the mechanisms underlying the importance of PI3Kβ activity remain elusive. Using a syngeneic genetically-engineered mouse (GEM) model of invasive breast cancer driven by concurrent ablation of Pten and Trp53 (p53), we showed that genetic inactivation of PI3Kβ led to a robust anti-tumor immune response that abrogated tumor growth in syngeneic immunocompetent mice, but not in immunodeficient mice. Mechanistically, PI3Kβ inactivation in the PTEN-null setting led to reduced STAT3 signaling and increased expression of immune stimulatory molecules, thereby promoting anti-tumor immune responses. Pharmacological PI3Kβ inhibition also elicited anti-tumor immunity, and synergized with immunotherapy to inhibit tumor growth. Mice with complete responses to the combined treatment displayed immune memory and rejected tumors upon re-challenge. Our findings demonstrate a molecular mechanism linking PTEN loss and STAT3 activation in cancer and suggest that PI3Kβ controls immune escape in PTEN-null tumors, providing a rationale for combining PI3Kβ inhibitors with immunotherapy for the treatment of PTEN-deficient breast cancer.
2023-03-07 | GSE225064 | GEO
Project description:T cell-specific deletion of PTEN induces premalignancy in CD4+ CD8+ (DP) immature T cells in the thymus, which progresses to the development of mature CD4+ T cell lymphomas in the lymph nodes and spleen. As part of a screen to identify factors that inhibit progression to malignancy, we compared miRNA expression in premalignant PTEN-deficient DP thymocytes versus wild-type controls.
2014-04-12 | GSE56759 | GEO
Project description:Purpose: compare the gene expression diffenrence between wildtype and Pten-deficient 5-HT neurons. Methods: 5-HT neurons cell body are collected from acut brain slice with patch electrodes. Pten-deficient 5-HT neurons are obtained from Pet1-Cre; Ptenflox/flox mice. Normal 5-HT neurons are obtained from littermate wildtype mice. Reverse transcription was performed using a SMARTer Ultra Low RNA Kit (Clontech, Japan). Single-cell cDNA was amplified using an Advantage 2 PCR Kit (Clontech, Japan). Purified cDNA from individual cells were sequenced using the Illumina HiSeq 2000 platform. Sequence reads were aligned to the mouse mm9 genome using TopHat. Differential expression analysis was performed using DESeq (Bioconductor) followed by Student t-test. Genes were considered differentially expressed if p<0.05. Results: The somatic compartments of individual YFP-labeled 5-HT neurons in acute brain slices were harvested for RNA sequencing. Each of the cells had 2 X 107 reads mapping back to the mouse genome when analyzed using the RUM mapping program. We found 859 genes (381 up-regulated, 478 down-regulated) were differentially expressed in Pten-deficient 5-HT neurons. Gene ontology of differentially expressed genes revealed the biological processes up-regulated and down-regulated in Pten-deficient 5-HT neurons. The absence of Pten in 5-HT neurons was associated with significantly increased expression of genes involved in the regulation of axonal extension and cell size, cell morphogenesis and cytoskeleton organization
2021-01-12 | GSE164610 | GEO
Project description:Yap1 is a critical transcription coactivator in the Hippo pathways. However, its target genes are not well defined in prostate cancer cells. To determine the downstream transcriptional targets and pathways of Yap1 in Pten/Smad4-defiicent mouse prostate cancer cells, ChIP-seq was performed in the Pten/Smad4-deficient mouse prostate cancer cells.
2022-12-31 | GSE162747 | GEO