Expression profiling of FACS purified Lin-cKit+ cells from compound URE-/+::Msh2-/- mice with AML and control animals
Minimal PU.1 reduction induces a preleukemic state and promotes development of acute myeloid leukemia.
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View SamplesExpression profiling of FACS purified Lin-cKit+ cells from preleukemic compound URE-/+::Msh2-/- mice and control animals (two separate pools of 3 mice each)
Minimal PU.1 reduction induces a preleukemic state and promotes development of acute myeloid leukemia.
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View SamplesThe p53 protein is the most frequently inactivated tumor suppressor in human cancer. While p53 mutations are found in 50% of all cancers, the p53 pathway can also be suppressed by its interaction with endogenous inhibitors HDMX and HDM2, which are frequently overexpressed in patients with acute myeloid leukemia and other cancers. Thus, pharmacological disruption of both these interactions is an attractive strategy to restore p53-dependent tumor suppressor activity in AML with wild type P53. Strategies targeting HDM2 have recently generated promising results; however, cancer cells are still left vulnerable to p53 inhibition by HDMX, particularly in cancers such as leukemia that overexpress HDMX. In this study, we demonstrate that dual HDMX/HDM2 inhibition using a stapled alpha-helical peptide (ALRN-6924), which has recently entered clinical testing, leads to striking anti-leukemic effects. ALRN-6924 robustly activates p53-dependent transcription at the single cell and single molecule level, and exhibits biochemical and molecular biological on-target activity in leukemia cells in vitro and in a patient who received ALRN-6924 treatment. Dual HDMX/HDM2 inhibition by ALRN-6924 inhibits cellular proliferation by inducing cell cycle arrest and apoptosis in cell lines and primary AML patients' cells, including in leukemic stem cell-enriched populations, and disrupts functional clonogenic and serial replating capacity. Furthermore, ALRN-6924 leads to significantly improved survival in an AML xenograft model in vivo. At the molecular level, dual HDMX/HDM2 inhibition leads to global transcriptional activation of p53-dependent pathways in leukemia cells. Our study provides insight into the effects of dual HDMX/HDM2 inhibition and proof-of-concept for ALRN-6924 as a novel therapeutic approach in AML and other cancers with high HDMX levels. Overall design: Total mRNA expression profiles of vehicle (1:10 DMSO) or 1 uM ALRN-6924 treated AML cells (6 hours) were generated by deep sequencing, in triplicates, using the Illumnia HiSeq 2500 instrument.
Dual inhibition of MDMX and MDM2 as a therapeutic strategy in leukemia.
Specimen part, Cell line, Subject
View SamplesFollicular lymphoma (FL) is an indolent lymphoma associated with follicular center B cells, and typically contains the Bcl-2 chromosomal translocation t(14;18), which leads to overexpression of the anti-apoptotic intracellular protein Bcl-2. FLs are sensitive to chemotherapy; however, patient relapses occur and response duration becomes progressively shorter, with the majority of patients eventually dying from the disease. Enzastaurin (LY317615), an acyclic bisindolylmaleimide, was initially developed as an ATP-competitive selective inhibitor of PKC. We found, in agreement with recent reports, that enzastaurin inhibits cell proliferation and induces apoptosis. These results are consistent with decreased phosphorylation of the Akt pathway and its downstream targets. To provide new insights into the anti-tumor action of enzastaurin on non-Hodgkin lymphoma, we investigated its effects on gene expression profiles of the B cell lymphoma RL cell line by oligonucleotide microarray analysis. We identified a set of 41 differentially expressed genes, mainly involved in cellular adhesion, apoptosis, inflammation, and immune and defense responses. These observations provide new insights into the mechanisms involved in the induction of apoptosis by enzastaurin in B cell lymphoma cell lines, and identify possible pathways that may contribute to the induction of apoptosis.
Genomic profiling of enzastaurin-treated B cell lymphoma RL cells.
Specimen part, Cell line, Treatment
View SamplesThis SuperSeries is composed of the SubSeries listed below.
In Silico Characterization of miRNA and Long Non-Coding RNA Interplay in Multiple Myeloma.
Specimen part, Disease
View SamplesThe identification of deregulated microRNAs (miRNAs) and long non-coding RNAs (lncRNAs) in multiple myeloma (MM) has progressively added a further level of complexity to MM biology. In addition, the cross-regulation between lncRNAs and miRNAs has begun to emerge, and theoretical and experimental studies have demonstrated the competing endogenous RNAs (ceRNAs) activity of lncRNAs as natural miRNA decoys in pathophysiological conditions, including cancer. Currently, information concerning lncRNA and miRNA interplay in MM is virtually absent. Herein, we investigated in silico the lncRNA and miRNA relationship in a representative datasets encompassing 95 MM and 30 plasma cell leukemia patients at diagnosis and in four normal controls, whose expression profiles were generated by a custom annotation pipeline to detect specific lncRNAs. We applied target prediction analysis based on miRanda and RNA22 algorithms to 235 lncRNAs and 459 miRNAs selected with a potential pivotal role in the pathology of MM. Among pairs that showed significant correlation between lncRNA and miRNA expression levels, we identified 10 lncRNA-miRNA relationships suggestive of novel ceRNA network with relevance in MM.
In Silico Characterization of miRNA and Long Non-Coding RNA Interplay in Multiple Myeloma.
Specimen part, Disease
View SamplesThe identification of deregulated microRNAs (miRNAs) and long non-coding RNAs (lncRNAs) in multiple myeloma (MM) has progressively added a further level of complexity to MM biology. In addition, the cross-regulation between lncRNAs and miRNAs has begun to emerge, and theoretical and experimental studies have demonstrated the competing endogenous RNAs (ceRNAs) activity of lncRNAs as natural miRNA decoys in pathophysiological conditions, including cancer. Currently, information concerning lncRNA and miRNA interplay in MM is virtually absent. Herein, we investigated in silico the lncRNA and miRNA relationship in a representative datasets encompassing 95 MM and 30 plasma cell leukemia patients at diagnosis and in four normal controls, whose expression profiles were generated by a custom annotation pipeline to detect specific lncRNAs. We applied target prediction analysis based on miRanda and RNA22 algorithms to 235 lncRNAs and 459 miRNAs selected with a potential pivotal role in the pathology of MM. Among pairs that showed significant correlation between lncRNA and miRNA expression levels, we identified 10 lncRNA-miRNA relationships suggestive of novel ceRNA network with relevance in MM.
In Silico Characterization of miRNA and Long Non-Coding RNA Interplay in Multiple Myeloma.
Specimen part, Disease
View SamplesRNAseq analysis of cell lines with ADAR1-p150 and ADAR1-p110 knock-outs and primary human tissue samples (from GSE57353 and GSE99392 data sets) to identify sites of ADAR1 editing Overall design: 12 samples: 3 cell lines (HeLa, HeLa-p150KO, HeLa-ADAR1KO) with four conditions each (no treatment, MeV-vac2(GFP)-infected, MeV-CKO(GFP)-infected, IFNA/D-treated). One biological replicate per sample. In addition, raw data files of 9 samples from series GSE57353 and GSE99392 were re-analyzed using the same data processing pipeline.
Extensive editing of cellular and viral double-stranded RNA structures accounts for innate immunity suppression and the proviral activity of ADAR1p150.
Cell line, Subject
View SamplesOrganoids derived from human pluripotent stem cells recapitulate the early three-dimensional organization of human brain, but whether they establish the epigenomic and transcriptional programs essential for brain development is unknown. We compared epigenomic and gene regulatory features in cerebral organoids and human fetal brain, using genome-wide, base resolution DNA methylome and transcriptome sequencing. Transcriptomic dynamics in organoids faithfully modeled gene expression trajectories in early-to-mid human fetal brains. We found that early non-CG methylation accumulation at super-enhancers in both fetal brain and organoids marks forthcoming transcriptional repression in the fully developed brain. 74% of 35,627 demethylated regions identified during organoid differentiation overlapped with fetal brain regulatory elements. Interestingly, pericentromeric repeats showed widespread demethylation in multiple types of in vitro human neural differentiation models but not in fetal brain. Our study reveals that organoids recapitulate many epigenomic features of mid-fetal human brain and also identified novel non-CG methylation signatures of brain development. Overall design: MethylC-seq and RNA-seq of Cerebral Organoids differentiation
Cerebral Organoids Recapitulate Epigenomic Signatures of the Human Fetal Brain.
No sample metadata fields
View SamplesThis SuperSeries is composed of the SubSeries listed below.
MHC class II transactivator CIITA is a recurrent gene fusion partner in lymphoid cancers.
Specimen part, Cell line, Treatment
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