GEO DataSets

Analysis of bone marrow CD34+ hematopoietic stem cells of myelodysplastic syndrome (MDS) patients. MDS is a group of clonal hematopoietic stem cell malignancies characterized by ineffective hematopoiesis. Results provide insight into the molecular pathogenesis of MDS.

Organism:

Homo sapiens

Type:

Expression profiling by array, count, 2 disease state, 5 specimen sets

Platform:

GPL570

Series:

GSE19429

200 Samples

Download data: CEL

(Submitter supplied) In order to gain insight into the molecular pathogenesis of the myelodysplastic syndromes (MDS), we performed global gene expression profiling and pathway analysis on the hematopoietic stem cells (HSC) of 183 MDS patients as compared with the HSC of 17 healthy controls. The most significantly deregulated pathways in MDS include interferon signaling, thrombopoietin signaling and the Wnt pathway. Among the most significantly deregulated gene pathways in early MDS are immunodeficiency, apoptosis and chemokine signaling, whereas advanced MDS is characterized by deregulation of DNA damage response and checkpoint pathways. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Dataset:

GDS3795

Platform:

GPL570

200 Samples

Download data: CEL

(Submitter supplied) Myelodysplastic syndrome (MDS) transforms into an acute myelogenous leukemia (AML) with associated increased bone marrow blast infiltration. Using a transgenic mouse model, MRP8[NRASD12/hBCL-2], in which the NRAS:BCL-2 complex at the mitochondria induces MDS progressing to AML with dysplastic features, we studied the therapeutic potential of a BCL-2 homology domain 3 (BH3) mimetic inhibitor, ABT-737. more...

Organism:

Mus musculus

Type:

Expression profiling by array

Platform:

GPL6096

6 Samples

Download data: CEL

(Submitter supplied) This SuperSeries is composed of the SubSeries listed below.

Organism:

Homo sapiens

Type:

Expression profiling by array; Methylation profiling by genome tiling array

Platforms:

GPL16100 GPL2040

45 Samples

Download data: CEL, GPR

(Submitter supplied) Genome-wide expression and methylation profiling identifies novel targets with aberrant hypermethylation and reduced expression in low-risk myelodysplastic syndromes (MDSs). Gene expression profiling signatures may be used to classify the subtypes of Myelodysplastic syndrome (MDS) patients. However, there are few reports on the global methylation status in MDS. The integration of genome-wide epigenetic regulatory marks with gene expression levels would provide additional information regarding the biological differences between MDS and healthy controls. more...

Organism:

Homo sapiens

Type:

Methylation profiling by genome tiling array

Platform:

GPL2040

20 Samples

Download data: GPR

(Submitter supplied) Genome-wide expression and methylation profiling identifies novel targets with aberrant hypermethylation and reduced expression in low-risk myelodysplastic syndromes (MDSs). Gene expression profiling signatures may be used to classify the subtypes of Myelodysplastic syndrome (MDS) patients. However, there are few reports on the global methylation status in MDS. The integration of genome-wide epigenetic regulatory marks with gene expression levels would provide additional information regarding the biological differences between MDS and healthy controls. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL16100

25 Samples

Download data: CEL

(Submitter supplied) Microarray analysis with 40,000 cDNA gene chip arrays determined differential gene expression profiles (GEPs) in CD34+ marrow cells from myelodysplastic syndrome (MDS) patients compared to normal individuals. Using focused bioinformatics analyses, we found 1175 genes significantly differentially expressed by MDS vs Normal, requiring a minimum of 39 genes to separately classify these patients. Major GEP differences were demonstrated between Normal and MDS patients and between several MDS subgroups: (1) those whose disease remained stable (sMDS) and those who subsequently transformed (tMDS) to acute myeloid leukemia (AML); (2) between del(5q) and other MDS patients. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL9335

41 Samples

Download data: TXT

(Submitter supplied) Epigenetic mechanisms contribute to deregulated gene expression of hematopoietic progenitors in Myelodysplastic Syndromes (MDS). Hypomethylating agents are able to improve peripheral cytopenias in MDS patients. To identify critical gene expression changes induced by hypomethylating agents, we analyzed gene expression profiling (GEP) of myelodysplastic and normal CD34+ hematopoietic stem cells treated in vitro with or without decitabine. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL96

30 Samples

Download data: CEL

(Submitter supplied) Isolated deletions of the long arm of chromosome 5 (del(5q)) are observed in 10% of myelodysplastic syndromes (MDS) and are associated with a more favorable prognosis, although the clinical course varies considerably. If one or more additional chromosomal aberration/s are present this correlates with a significant shorter overall survival. To assess the frequency of hidden abnormalities in cases with an isolated cytogenetic del(5q), we have performed a genome wide high resolution 44K 60mer oligonucleotide array CGH study using DNA from bone marrow cells of 12 MDS and one AML patient. more...

Organism:

Homo sapiens

Type:

Genome variation profiling by genome tiling array

Platforms:

GPL2873 GPL2879

13 Samples

Download data: TXT

(Submitter supplied) ABT-737 is a highly potent small molecule inhibitor of Bcl-2 which has demonstrated efficacy in preclinical studies. To identify factors which mediate ABT-737 sensitivity we created an ABT-737-resistant cell line derivative. This cell lines maintained its ABT-737 resistance in vitro and in vivo. We isolated RNA from H187-63AR xenografts and compared their global gene expression to H187 xenografts. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL6104

4 Samples

Download data: TXT

(Submitter supplied) Apc, a negative regulator of the canonical Wnt signaling pathway, is a bona-fide tumor suppressor whose loss of function results in intestinal polyposis. APC is located in a commonly deleted region on human chromosome 5q, associated with myelodysplastic syndrome (MDS) suggesting that haploinsufficiency of APC contributes to the MDS phenotype. Analysis of the hematopoietic system of mice with the Apcmin allele that results in a premature stop codon and loss of function, showed no abnormality in steady state hematopoiesis. more...

Organism:

Mus musculus

Type:

Expression profiling by array

Platform:

GPL1261

6 Samples

Download data: CEL

(Submitter supplied) AML/MDS patients carrying 11q amplifications involving the mixed lineage leukemia gene (MLL) locus are characterized by a later onset, a complex aberrant karyotype (CAK) frequently including deletions within 5q, 17p and 7q, as well as fast progression of the disease with extremely poor prognosis. We and other have shown that the MLL gene is over expressed in amplified cases, however, in most of the cases the amplified region is not restricted to the MLL locus. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL570

15 Samples

Download data: CEL

(Submitter supplied) AML/MDS patients carrying 11q amplifications involving the mixed lineage leukemia gene (MLL) locus are characterized by a complex aberrant karyotype (CAK) frequently including deletions within 5q, 17p and 7q, a later onset and fast progression of the disease with extremely poor prognosis. We and others have shown that the MLL gene is overexpressed in amplified cases; however, in most of the cases the amplified region is not restricted to the MLL locus. more...

Organism:

Homo sapiens

Type:

Genome variation profiling by genome tiling array

Platform:

GPL5000

12 Samples

Download data: GPR

(Submitter supplied) Chromosome 5q deletions (del(5q)) are common in high-risk (HR) Myelodysplastic Syndrome (MDS) and Acute Myeloid Leukemia (AML); however, the gene regulatory networks that sustain these aggressive diseases are unknown. Reduced miR-146a expression in del(5q) HR-MDS/AML and miR-146a-/- hematopoietic stem/progenitor cells (HSPC) results in TRAF6/NF-κΒ activation. Increased survival and proliferation of HSPC from miR-146alow HR-MDS/AML is sustained by a neighboring haploid gene, SQSTM1 (p62), expressed from the intact 5q allele. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL6244

9 Samples

Download data: CEL

(Submitter supplied) Investigation of differences in gene expression between NHD13 mice with myelodysplastic syndrome and wild type littermates.

Organism:

Mus musculus

Type:

Expression profiling by array

Platform:

GPL6887

6 Samples

Download data: TXT

(Submitter supplied) Delineating key HSC regulators is of significant interest for informing the treatment of hematologic malignancy. While HSC activity is enhanced by overexpression of SKI, the transforming growth factor-beta (TGFβ) signaling antagonist corepressor, its requirement in HSC is unknown. Here we reveal a profound defect in Ski-/- HSC fitness but not specification. Transcriptionally, Ski-/- HSC exhibited striking upregulation of TGFb superfamily signaling and splicing alterations. more...

Organism:

Mus musculus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL17021

94 Samples

Download data: TXT

(Submitter supplied) Analysis of Lin-c-Kit+Sca-1- haematopoietic stem cells (HSCs) expressing the Nup98-HoxD13 (NHD13) fusion gene. NHD13 induces myelodysplastic syndrome (MDS) in mice. Results provide insight into the molecular basis of the myelodysplastic phenotype

Organism:

Mus musculus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL13112

6 Samples

Download data: TSV

(Submitter supplied) This SuperSeries is composed of the SubSeries listed below.

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platform:

GPL16791

12 Samples

Download data

(Submitter supplied) Monosomy 7 or deletion of 7q (del(7q)) frequently arise in inherited and acquired bone marrow failure, and are associated with progression to high grade Myelodysplastic Syndrome (MDS) and acute leukemia. Current non-transplant approaches to treat marrow failure may be complicated by potential stimulation of clonal outgrowth. To study the biological consequences of del(7q) within the context of a failing marrow, we utilized induced pluripotent stem cells (iPSCs) derived from patients with Shwachman Diamond Syndrome (SDS) and genomically engineered a deletion of (7q). more...

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platform:

GPL16791

6 Samples

Download data: TXT

(Submitter supplied) Monosomy 7 or deletion of 7q (del(7q)) frequently arise in inherited and acquired bone marrow failure, and are associated with progression to high grade Myelodysplastic Syndrome (MDS) and acute leukemia. Current non-transplant approaches to treat marrow failure may be complicated by potential stimulation of clonal outgrowth. To study the biological consequences of del(7q) within the context of a failing marrow, we utilized induced pluripotent stem cells (iPSCs) derived from patients with Shwachman Diamond Syndrome (SDS) and genomically engineered a deletion of (7q). more...

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platform:

GPL16791

6 Samples

Download data: TXT