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Expression profiling of murine hemopoietic cell survival on cDNA arrays.

ABSTRACT: Deregulated cell survival programs are a classical hallmark of cancer. We have previously identified a serine residue (Ser585) in the beta-c subunit of the granulocyte-macrophage colony-stimulating factor (GM-CSF) receptor that selectively and independently promotes cell survival. We now show that Ser585 phosphorylation is constitutive in 20/23 (87%) acute myeloid leukemia (AML) patient samples indicating that this survival-only pathway is frequently deregulated in leukemia. We performed a global expression screen to identify gene targets of this survival pathway and report a 138-gene beta-c Ser585-regulated transcriptome. Pathway analysis defines a gene network enriched for PI 3-kinase target genes as well as a cluster of genes involved in cancer and cell survival.

ORGANISM(S): Mus musculus

PROVIDER: GSE18221 | GEO | 2009/09/26

SECONDARY ACCESSION(S): PRJNA123495

REPOSITORIES: GEO

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Expression profiling of murine hemopoietic cell survival on cDNA arrays.

Project description:Deregulated cell survival programs are a classical hallmark of cancer. We have previously identified a serine residue (Ser585) in the beta-c subunit of the granulocyte-macrophage colony-stimulating factor (GM-CSF) receptor that selectively and independently promotes cell survival. We now show that Ser585 phosphorylation is constitutive in 20/23 (87%) acute myeloid leukemia (AML) patient samples indicating that this survival-only pathway is frequently deregulated in leukemia. We performed a global expression screen to identify gene targets of this survival pathway and report a 138-gene beta-c Ser585-regulated transcriptome. Pathway analysis defines a gene network enriched for PI 3-kinase target genes as well as a cluster of genes involved in cancer and cell survival. factorial design; factors: time x 2 & mutation, same RNA was used in both GSE18220 & GSE18221

2010-05-22 | E-GEOD-18221 | biostudies-arrayexpress

Expression profiling of murine hemopoietic cell survival on oligo arrays.

2009-09-26 | GSE18220 | GEO

Expression profiling of murine hemopoietic cell survival on oligo arrays.

Project description:Deregulated cell survival programs are a classical hallmark of cancer. We have previously identified a serine residue (Ser585) in the beta-c subunit of the granulocyte-macrophage colony-stimulating factor (GM-CSF) receptor that selectively and independently promotes cell survival. We now show that Ser585 phosphorylation is constitutive in 20/23 (87%) acute myeloid leukemia (AML) patient samples indicating that this survival-only pathway is frequently deregulated in leukemia. We performed a global expression screen to identify gene targets of this survival pathway and report a 138-gene beta-c Ser585-regulated transcriptome. Pathway analysis defines a gene network enriched for PI 3-kinase target genes as well as a cluster of genes involved in cancer and cell survival. factorial square; factors: time & mutation, same RNA was used in both GSE18220 & GSE18221

2010-05-22 | E-GEOD-18220 | biostudies-arrayexpress

Genome wide transcriptome analysis reveals complex regulatory mechanisms underlying phosphate homeostasis in soybean nodules

Project description:Phosphorus (P) deficiency is a major limitation for legume crop production. Although overall adaptations of plant roots to P deficiency have been extensively studied, fragmentary information is available in regards to root nodule responses to P deficiency. In this study, genome wide transcriptome analysis was conducted using RNA-seq analysis to investigate molecular mechanisms underlying soybean (Glycine max) nodule adaptation to phosphate (Pi) starvation. Phosphorus deficiency significantly decreased soybean nodule growth and nitrogenase activity. Nodule Pi concentrations declined by 49% in response to P deficiency, but this was well below the 87% and 88% decreases observed in shoots and roots, respectively. Nodule transcript profiling revealed that a total of 2,055 genes exhibited differential expression patterns between Pi sufficient and deficient conditions. A set of DEGs appeared to be involved in maintaining Pi homeostasis in soybean nodules, including 8 Pi transporters (PTs), 8 proteins containing the SYG1/PHO81/XPR1 domain (SPXs), and 16 purple acid phosphatases (PAPs). The results suggest that a complex transcriptional regulatory network participates in soybean nodule adaption to Pi starvation, most notable a Pi signaling pathway specifically involved in maintaining Pi homeostasis in nodules.

2018-11-20 | GSE116593 | GEO

Drug-tolerant cell-derived exosomes regulate proteasome inhibitor resistance pathways in MLL leukemias

Project description:The interplay between cancer cells and microenvironment can influence treatment response and plays a key role in the emergence of drug resistance. Rapidly acquired resistance prevents proteasome inhibitors (PIs) therapies from achieving stable and complete responses. Investigating the underlying mechanisms and developing effective strategies against PI resistance are highly desired in the clinic. Here we uncovered that PI resistance was reversible in MLL leukemia, which consistent with the finding that patients could regain sensitivity to PIs after a drug holiday. Exosomes derived from drug-tolerant cells could transmit PI resistance to sensitive cells via facilitating cell cycle arrest and stemness pathway in MLL leukemia cells. Furthermore, TieDIE algorithm integration analysis of transcriptome and proteome datasets identified candidate exosomal proteins, providing potential therapeutic targets for treating refractory MLL leukemia. Therefore, exosomal regulatory proteins may serve as a predictor and a potential therapeutic target for PI resistance, and inhibiting the secretion of exosomes is a promising strategy for restoring PI resistance in vivo, which provides a paradigm and may also be applied for the treatment of other cancers resulting from chemotherapy relapse.

2020-05-27 | PXD014711 | Pride

A targeted knockdown screen of genes coding for phosphoinositide modulators identifies PIP4K2A as required for acute myeloid leukemia cell proliferation and survival

Project description:Given the importance of deregulated phosphoinositide (PI) signaling in leukemic hematopoiesis, genes coding for proteins that regulate PI metabolism may have significant and as yet unappreciated roles in leukemia. We performed a targeted knockdown screen of PI modulator genes in human AML cells and identified candidates required to sustain proliferation or prevent apoptosis. One of these, the lipid kinase phosphatidylinositol-5-phosphate 4-kinase, type II, alpha (PIP4K2A) regulates cellular levels of phosphatidylinositol-5-phosphate (PtsIns5P) and phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P2). We found PIP4K2A to be essential for the clonogenic and leukemia-initiating potential of human AML cells, and for the clonogenic potential of murine MLL-AF9 AML cells. Importantly, PIP4K2A is also required for the clonogenic potential of primary human AML cells. Its knockdown results in accumulation of the cyclin-dependent kinase inhibitors CDKN1A and CDKN1B, G1 cell cycle arrest and apoptosis. Both CDKN1A accumulation and apoptosis were partially dependent upon activation of the mTOR pathway. Critically, however, PIP4K2A knockdown in normal hematopoietic stem and progenitor cells, both murine and human, did not adversely impact either clonogenic or multilineage differentiation potential, indicating a selective dependency which we suggest may be the consequence of the regulation of different transcriptional programmes in normal versus malignant cells. Thus, PIP4K2A is a novel candidate therapeutic target in myeloid malignancy.

2014-03-13 | GSE54309 | GEO

RNA-seq of coding RNA from samples of 20 human individuals representing four cancers: glioma, colon cancer, liver cancer and testicular cancer, as well as three cell lines.

Project description:RNA-seq was performed of cancer samples from 20 human individuals representing four cancers: glioma, colon cancer, liver cancer and testicular cancer, as well as six samples from the three cell lines NTERA-2, U-87 MG och U-138 MG in order to study the human tissue transcriptome.

2024-02-26 | E-MTAB-4681 | biostudies-arrayexpress

MicroRNA-138: A Pro-survival OncomiR for Glioma Stem Cells is Associated with Tumor Recurrence [miRNA]

Project description:We report the identification of microRNA-138 (miR-138), as a molecular signature of GSCs and demonstrate a vital role for miR-138 to promote growth and survival of bona fide tumor-initiating cells with self-renewal potential.

2012-12-20 | GSE39486 | GEO

KrasG12D partially compensates for the loss of beta-catenin in MLL-AF9 AML

Project description:The Wnt/beta-catenin pathway is required for the development of leukemia stem cells in MLL-AF9 AML. We evaluated the dependance on beta-catenin for KrasG12DMLL-AF9 leukemia. Lin-Kit+ bone marrow cells obtained from mice transplanted with primary MLL-AF9 leukemia cells and KRasG12DMLL-AF9 leukemia cells were assessed for gene expression in the presence or absence of beta-catenin

2014-07-02 | E-GEOD-49248 | biostudies-arrayexpress

MicroRNA-138: A Pro-survival OncomiR for Glioma Stem Cells is Associated with Tumor Recurrence [mRNA]

2012-12-20 | GSE39487 | GEO

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