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Expression data from PonA stimulated transfected U373 Cells

ABSTRACT: Induction of proximal components of the PI3-K/AKT pathway stimulates the expression of several genes, including several genes in the JAK/STAT pathway, documenting a crosstalk between these two important pathways. These changes were accompnied by nuclear translocation of certain transcription factors as well. we measured levels of RNA transcripts using the Human Genome U95 Av2 geneChip microarrays. We used an ecdysone-inducible mammalian expression system.

ORGANISM(S): Homo sapiens

SUBMITTER: F Uckun

PROVIDER: E-GEOD-18798 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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STAT3 is a substrate of SYK tyrosine kinase in B-lineage leukemia/lymphoma cells exposed to oxidative stress.

Uckun Fatih M FM Qazi Sanjive S Ma Hong H Tuel-Ahlgren Lisa L Ozer Zahide Z

Proceedings of the National Academy of Sciences of the United States of America 20100129 7

We provide unprecedented genetic and biochemical evidence that the antiapoptotic transcription factor STAT3 serves as a substrate for SYK tyrosine kinase both in vitro and in vivo. Induction of SYK in an ecdysone-inducible mammalian expression system results in STAT3 activation, as documented by tyrosine phosphorylation and nuclear translocation of STAT3, as well as amplified expression of several STAT3 target genes. STAT3 activation after oxidative stress (OS) is strongly diminished in DT40 chi ...[more]

PMID: 20133729

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Expression data from PonA stimulated transfected U373 Cells

Project description:Induction of proximal components of the PI3-K/AKT pathway stimulates the expression of several genes, including several genes in the JAK/STAT pathway, documenting a crosstalk between these two important pathways. These changes were accompnied by nuclear translocation of certain transcription factors as well.

2010-10-01 | GSE18798 | GEO

Global quantitative proteomics reveals novel factors in the ecdysone signaling pathway in Drosophila melanogaster.

Project description:Global quantitative proteomics reveals novel factors in the ecdysone signaling pathway in Drosophila melanogaster.

2015-01-23 | PXD001455 | Pride

Defective K-Ras Oncoproteins Initiate Cancer In Vivo and Evolve to Overcome Impaired Effector Binding

Project description:The oncogenic proteins expressed in human cancer cells are exceedingly difficult targets for drug discovery due to intrinsic properties of the Ras GTPase switch. As a result, recent efforts have largely focused on inhibiting Ras-regulated kinase effector cascades, particularly the Raf/MEK/ERK and PI3 kinase/Akt/mTOR pathways. We constructed murine stem cell leukemia virus (MSCV) vectors encoding oncogenic K-RasD12 with additional “second site” amino acid substitutions that that impair PI3 kinase/Akt or Raf/MEK/ERK activation and performed bone marrow transduction/transplantation experiments in mice. In spite of attenuated signaling properties, defective K-Ras oncoproteins induced aggressive clonal T lineage acute lymphoblastic leukemia (T-ALL). These leukemias exhibited a high frequency of somatic Notch1 mutations, which is also true of human T-ALL. Multiple independent T-ALLs restored full oncogenic Ras activity by acquiring “third site” mutations within the viral KrasD12 transgenes. Other leukemias with undetectable PTEN and elevated phosphoryated Akt levels showed a similar gene expression profile to human early T progenitor (ETP) T-ALL. Expressing oncoproteins that are defective for specific functions is a general strategy for assessing requirements for tumor maintenance and uncovering potential mechanisms of drug resistance in vivo. In addition, our observation that defective Kras oncogenes regain potent cancer initiating activity strongly supports simultaneously targeting distinct components of Ras signaling networks in the substantial fraction of cancers with RAS mutations. WT Balb/c mice were lethally irradiated and transplanted with WT Balb/c bone marrow cells transduced with MSCV-IRES-Kras mutant-GFP vectors. Mice developed T-cell lymphoproliferative disease.

2011-09-30 | E-GEOD-28687 | biostudies-arrayexpress

Compilation of expression profiles distinct thyroid neoplasias

Project description:A cohort of distinct thyroid neoplasias was hybridized onto the Affymetrix U95 GeneChip

2012-06-01 | GSE29315 | GEO

Amniotic fluid RNA gene expression profiling provides insights into the phenotype of Turner syndrome

Project description:Background: Turner syndrome, a common sex chromosome aneuploidy, has characteristics and malformations associated with the phenotype. Fetal amniotic fluid is a complex biological material that could contribute to the understanding Turner syndrome pathogenesis. Global gene expression analysis of Turner syndrome fetal amniotic fluid supernatant was utilized to identify organ systems and specific genes that may play a role in the pathophysiologic changes that are seen in individuals with Turner syndrome. Methods: Global gene expression analysis was performed utilizing cell-free RNA from five midtrimester fetuses with Turner syndrome matched with five euploid female fetuses. Total RNA was extracted, amplified, hybridized onto GeneChipM-BM-. Human Genome U133 Plus 2.0 arrays. Network and pathway analysis of differentially expressed genes were completed. Chromosomal distribution of gene expression differences, differential expression by pathway and organ system (a M-bM-^@M-^\Turner syndrome core transcriptomeM-bM-^@M-^]), and candidate genes that could play a pathological role were identified. Results: There were 470 differentially expressed genes identified in the Turner syndrome transcriptome. The differentially expressed genes were distributed randomly across different chromosomes. Among genes on the X chromosome, XIST was down-regulated, and SHOX not differentially expressed. The most highly represented organ systems were hematologic/immune and neurologic. Increased representation of differentially expressed genes in the hematologic/immune system distinguishes the Turner syndrome transcriptome from the euploid, trisomy 18 and trisomy 21 transcriptomes previously studied in our laboratory. Manual curation of the differentially expressed gene list identified genes including NFATC3, IGFBP5, and LDLR that warrant further study. 2nd trimester amniotic fluid mRNA expression was compared between 5 Turners and 5 euploid fetuses.

2014-06-13 | E-GEOD-58435 | biostudies-arrayexpress

Arsenic trioxide inhibits the metastasis of osteosarcoma through suppressing transcriptional activity of GLI2 and downregulation of ribosomal protein S3

Project description:Aberrations in the Hedgehog (Hh) pathway are known to related to several malignancies. However, little is known about the function of GLI2, a transcription factor in the Hh pathway, in osteosarcoma. Osteosarcoma is the most frequent primary bone sarcoma in children and adolescents. Despite survival rates of osteosarcoma patients have increased, the prognosis of patients with metastasis remains poor. Therefore, the development of novel therapeutic strategies for osteosarcoma patients is development of novel therapeutic strategies for osteosarcoma patients is urgently needed. Aberrations in the Hedgehog (Hh) pathway are known to related to several malignancies. However, little is known about the function of GLI2, a transcription factor in the Hh pathway, in osteosarcoma. Our findings revealed that GLI2 was overexpressed in osteosarcoma tissues. Additionally, GLI2 is involved in the metastasis of osteosarcoma cells through the regulation of ribosomal protein S3 expression. Furthermore, we showed that arsenic trioxide (ATO) suppressed the invasion and lung metastasis of osteosarcoma cells by the inhibition of GLI transcription. Consequently, these finding reveal a novel function of GLI2 in the metastasis of osteosarcoma and that ATO may be a new therapeutic agentay be a new therapeutic agent. We revealed that a novel function of GLI2 in the metastasis of osteosarcoma and that ATO may be a new therapeutic agent for preventing osteosarcoma metastasis. Negative siRNA(U-2OS) and GLI2 siRNA(U-2OS)

2012-12-14 | E-GEOD-42903 | biostudies-arrayexpress

Comprehensive Analysis of Genes Expressed by Rare Microchimeric Fetal Cells in Maternal Mouse Lung

Project description:During pregnancy, cells from each fetus travel into the maternal circulation and organs, resulting in the development of microchimerism. Identification of the cell types in this microchimeric population would permit better understanding of possible mechanisms by which they affect maternal health. However, comprehensive analysis of fetal cells has been hampered by their rarity. In this study, we sought to overcome this obstacle by combining flow cytometry with multidimensional gene expression microarray analysis of fetal cells isolated from the murine maternal lung during late pregnancy. Fetal cells were collected from the lungs of pregnant female mice. cDNA was amplified and hybridized to gene expression microarrays. The resulting fetal cell core transcriptome was interrogated using multiple methods including Ingenuity Pathway Analysis, the BioGPS gene expression database, principal component analysis, the Eurexpress gene expression atlas and primary literature. Here we report that small numbers of fetal cells can be flow sorted from the maternal lung, facilitating discovery-driven gene expression analysis. We additionally show that gene expression data can provide functional information about the fetal cells. Our results suggest that fetal cells in the murine maternal lung are a mixed population, consisting of trophoblasts, mesenchymal stem cells and cells of the immune system. The detection of trophoblasts and immune cells in the maternal lung may facilitate future mechanistic studies related to the development of immune tolerance and pregnancy-related complications, such as preeclampsia. Furthermore, the presence and persistence of mesenchymal stem cells in maternal organs may have implications for long-term postpartum maternal health. Comprehensive gene expression microarray analysis of fetal cells isolated from the pregnant murine maternal lung. Seven individual replicates were performed.

2012-05-30 | E-GEOD-38188 | biostudies-arrayexpress

The amniotic fluid transcriptome: a source of novel information about human fetal development

Project description:Amniotic fluid (AF) is a complex biological material that provides a unique window into the developing human. Residual AF supernatant contains cell-free fetal RNA. The objective of this study was to develop an understanding of the AF core transcriptome by identifying the transcripts ubiquitously present in the AF supernatant of euploid midtrimester fetuses. We detected 476 well-annotated genes present in all twelve AF samples. Functional analysis identified 6 physiological systems represented in the AF core transcriptome, including musculoskeletal and nervous system development and function and embryonic/ organismal development. mTOR signaling was identified as a key canonical pathway. Twenty-three highly organ-specific transcripts were identified; six of these are known to be highly expressed by fetal brain. This study demonstrates that AF cell-free fetal RNA can provide biological information about multiple fetal organ systems. This was an in silico investigation of gene expression in 12 euploid midtrimester AF samples acquired primarily for advanced maternal age. We focused on the transcripts called M-bM-^@M-^\presentM-bM-^@M-^] in all of the samples. Functional analyses were performed using Ingenuity software. Fetal-organ specificity was examined for each transcript using the GNF Gene Expression Atlas. For fetal organs not represented in the atlas, manual literature searching and Ingenuity analysis were used.

2012-01-11 | E-GEOD-33168 | biostudies-arrayexpress

Project description:Epibacterium ulvae U95

| PRJEB16117 | ENA

Transcription profiling of rat REF52 cells expressing SV40 T antigens

Project description:SV40 transforms cells through the action of two oncoproteins, large T antigen and small t antigen. Small t antigen targets phosphatase PP2A, while large T antigen stimulates cell proliferation and survival by action on multiple proteins, including the tumor suppressors Rb and p53. Large T antigen also binds components of the transcription initiation complex and several transcription factors. We examine global gene expression in SV40-transformed REF52 cells. SV40 transformation alters the expression of approximately 480 cellular genes. Much of this regulation is consistent with T antigen action on the Rb-E2F pathway. Experiment Overall Design: We used the Affymetrix RGU34A microarrays to probe the global mRNA expression from two wild-type REF52neo and three REF52neoT stable cell lines. Cells were grown to two days post-confluence and harvested.

2009-09-12 | E-GEOD-7836 | biostudies-arrayexpress

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