GEO DataSets

Analysis of primary MLL-rearranged ALL samples (>90% leukemic blasts) from untreated infants. In vitro prednisolone sensitivity was assessed by a 4day cytotoxicity (MTT) assay. Results provide insight into the molecular basis of glucocorticoid resistance in MLL-rearranged infant ALL patients.

Organism:

Homo sapiens

Type:

Expression profiling by array, transformed count, 2 disease state sets

Platform:

GPL570

Series:

GSE32962

43 Samples

Download data: CEL

(Submitter supplied) Acute Lymphoblastic Leukemia (ALL) in infants (<1 year of age) is characterized by a high incidence of MLL translocations which is associated with a poor prognosis. Contributing to this poor prognosis is cellular drug resistance, especially to glucocorticoids like prednisolone. Although in vitro prednisolone resistance mechanisms have been proposed in pediatric ALL, it has never been studied in MLL-rearranged infant ALL, which are highly resistant to glucocorticoids in vitro and in vivo.

Organism:

Homo sapiens

Type:

Expression profiling by array

Dataset:

GDS4297

Platform:

GPL570

43 Samples

Download data: CEL

(Submitter supplied) Although the prognosis for childhood Acute Lymphoblastic Leukemia (ALL) in general has improved tremendously over the last decades, the survival chances for infants (<1 year of age) with ALL remains poor. A major obstacle hampering successful treatment results in infant ALL is cellular resistance to several drugs currently used in the treatment of ALL, especially to prednisolone (or prednisone). Therefore we set out to search for genes differentially expressed between from infant (children <1 year of age) and non-infant (children >1 year of age) ALL samples either resistant or sensitive to prednisolone.

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL96

52 Samples

Download data: CEL, CHP

(Submitter supplied) Acute Lymphoblastic Leukemia (ALL) in infants (<1 year) is characterized by a poor prognosis and a high incidence of MLL translocations. Several studies demonstrated the unique gene expression profile associated with MLL-rearranged ALL, but generally small cohorts were analyzed as uniform patient groups regardless of the type of MLL translocation, while the analysis of translocation-negative infant ALL remained unacknowledged.

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL570

73 Samples

Download data: CEL

(Submitter supplied) Analysis of basal gene expression in patient-derived xenograft cells. A panel of pediatric T-, B- and MLL-ALL xenografts was utilized to further understand the biology of leukemia

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL10904

31 Samples

Download data: TXT

(Submitter supplied) Effects of the pan-anti-apoptotic BCL-2 family small molecule inhibitor, obatoclax mesylate (GeminX Pharmaceuticals), on gene expression were evaluated by microarray analysis in order to gain insights into the killing mechanism by this compound in two human MLL-AF4 cell lines. The results of the gene expression profiling substantiated other lines of evidence derived from genetic and chemical cell death pathway inhibition, Western blot analysis, flow cytometric apoptosis assays, and electron microscopic analyses, showing triple apoptosis, autophagy, and necroptosis death pathway activation by this agent. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL570

12 Samples

Download data: CEL

(Submitter supplied) The aggressive MLL-rearranged leukemias are well-known for their unique gene-expression profiles. The goal of this study was to characterize the MLL-specific DNA methylation profiles in infant acute lymphoblastic leukemia (ALL). Genome-wide DNA methylation profiling was performed on primary infant ALL samples. The majority of infant ALL samples demonstrated severe DNA hypermethylation compared with normal pediatric bone marrows, which implies that targeting of DNA methylation may be an interesting option for future therapeutic strategies in MLL-rearranged infant ALL. more...

Organism:

Homo sapiens

Type:

Methylation profiling by genome tiling array

Platform:

GPL4126

60 Samples

Download data: TXT

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

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL10558

14 Samples

Download data: IDAT

(Submitter supplied) Gene expression analysis of two MLL-r leukaemia cell lines (SM6p2 and SM6p3) and the parental PER-485 MLL-rearranged leukaemia cell line they were derived from by continuous culturing in CCI-006. SM6p2 and SM6p3 thereby developed induced resistance against the compound. The aim of this experiment was to identify any gene expression changes in SM6p2 and SM6p3 cells induced by continuous culturing in CCI-006, thereby potentially providing insight into the mechanisms of primary and induced resistance of MLL-rearranged leukaemia cell lines against the cytotoxic compound CCI-006.

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL10558

8 Samples

Download data: IDAT, TXT

(Submitter supplied) A phenotypic cell-based high-throughput screen identified a novel small molecule, CCI-006 with selective cytotoxic activity against MLL-rearranged leukaemia cell lines. The aim of this experiment was to identify the mechanism of action of CCI-006 by investigating the gene expression changes induced in a MLL-rearranged leukaemia cell line following a short incubation with the compound.

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL10558

6 Samples

Download data: IDAT, TXT

(Submitter supplied) We investigated the anti-leukemic effects of the Bromodomain and Extra Terminal inhibitor I-BET151 on primary MLL-AF4 patient samples, using a xenotransplantation mouse model of MLL+ infant ALL in vivo. We reported that I-BET151 treatment impairs the engraftment and the disease burden of primary MLL+ infant ALL samples transplanted into immunedeficient mice. I-BET151 is able to arrest the growth of leukemic cells by blocking cell division and rapidly inducing apoptosis, through the deregulation of crucial target genes of the BRD4 and HOXA9/HOXA7 network. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL570

28 Samples

Download data: CEL

(Submitter supplied) We demonstrate the in vivo efficacy of the histone deacetylase inhibitor Panobinostat (LHB589) against MLL-rearranged ALL using xenograft mouse models of MLL-rearranged ALL cell lines and primary patient cells. Panobinostat monotherapy showed strong anti-leukaemic effects, extending survival and reducing overall disease burden. Comprehensive molecular analyses in vitro showed the anti-leukaemic activity in MLL-rearranged ALL to involve depletion of H2B ubiquitination via suppression of the RNF20/RNF40/WAC E3 ligase complex.

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL570

32 Samples

Download data: CEL

(Submitter supplied) Gene expression upon DOT1L inhibition, or Menin inhibition, or a combination of DOT1L and Menin inhibiting agents, was assessed in several MLL-rearranged human cell lines and a mouse model of MLL-AF9 leukemia. The goal of the study was to explore the mechanisms by which the EPZ0004777 and MI-2-2 chemicals collaborate to induce differentiation and cell death in MLL-AF4 and MLL-AF9 leukemias.

Organism:

Mus musculus; Homo sapiens

Type:

Expression profiling by array

Platforms:

GPL1261 GPL570

56 Samples

Download data: CEL

(Submitter supplied) MLL-r infant acute lymphoblastic leukemia (ALL) has largely unclear oncogenesis. It has been shown unrelated to copy number change or mutations in the tyrosine kinome. We therefore, explored the possible role of genome wide CpG island hypermethylation in MLL-r infant ALL. We employed the HpaII-tiny fragment Enrichment by Ligation-mediated PCR (HELP) assay to examine MLL-r infant leukemia samples (n=5), other common childhood ALL (n=5) and normals (n=5). more...

Organism:

Homo sapiens

Type:

Methylation profiling by genome tiling array

Platform:

GPL6604

15 Samples

Download data: PAIR

(Submitter supplied) MLL-r cell lines KOPN-8 and NOMO-1 were cultured with pinometostat to derive treatment emergent resistant pools. RNA sequencing was performed on the resistant pools to generate hypotheses around mechanisms of resistance

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platform:

GPL16791

24 Samples

Download data: XLSX

(Submitter supplied) Childhood acute lymphoblastic leukemia (ALL) comprises a large group of genetic subtypes with a favorable prognosis characterized by a TEL-AML1-fusion, hyperdiploidy (>50 chromosomes) or E2A-PBX1 fusion and a smaller group with unfavorable outcome characterized by either a BCR-ABL-fusion, MLL-rearrangement or T-ALL. About 25% of precursor B-ALL are currently genetically unclassified and have an intermediate prognosis. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL570

107 Samples

Download data: CEL, CHP

(Submitter supplied) To identify dysregulated molecules between pterygium tissues and uninvolved conjunctiva tissues from the same eye, we performed whole genome microarray expression profiling.

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL14550

8 Samples

Download data: TXT

(Submitter supplied) Gene Expression profiling of pterygium. Analysis of conjunctiva and pterygium samples. Keywords = pterygium Keywords: repeat sample

Organism:

Homo sapiens

Type:

Expression profiling by array

Dataset:

GDS1758

Platform:

GPL96

12 Samples

Download data: CEL, EXP

Expression profiling of primary pterygium tissue. Pterygium, a common ocular surface disorder, is a fibrovascular overgrowth from the conjunctiva onto the cornea. Results provide insight into pterygium pathogenesis.

Organism:

Homo sapiens

Type:

Expression profiling by array, count, 2 tissue sets

Platform:

GPL96

Series:

GSE2513

12 Samples

Download data: CEL, EXP

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

Organism:

Homo sapiens

Type:

Expression profiling by array; Expression profiling by high throughput sequencing

Platforms:

GPL11154 GPL570 GPL17303

117 Samples

Download data: CEL