GEO DataSets

(Submitter supplied) Acute lymphoblastic pediatric leukemia specimens without known genetic hallmarks are examined for hidden genomic aberrancies and related gene expression profiles Integration of genomic variation and gene expression profiling identifies hidden genetic lesions and novel pathways involved in BP-ALL pathogenesis Keywords: expression data

Organism:

Homo sapiens

Type:

Expression profiling by array; Genome variation profiling by SNP array; SNP genotyping by SNP array

Platforms:

GPL2004 GPL570 GPL2005

160 Samples

Download data: CEL, CHP, PDF

(Submitter supplied) Gene expression analyses, were performed on 121 consecutive childhood leukemias (87 B-lineage acute lymphoblastic leukemias (ALLs), 11 T-cell ALLs, and 23 acute myeloid leukemias; AMLs), investigated during an 8-year period at a single center. The supervised learning algorithm k-nearest neighbor (k-NN) was utilized to build gene expression predictors that could classify the ALLs/AMLs according to clinically important subtypes with high accuracy. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL4861

127 Samples

Download data: TXT

(Submitter supplied) We analyzed 52 Diagnostic samples from childhood Acute lymphoblastic leukemia samples

Organism:

Homo sapiens

Type:

Methylation profiling by genome tiling array

Platform:

GPL13534

52 Samples

Download data: CSV

(Submitter supplied) Lymphoblastic lymphoma (LBL) is one of the most frequent occurring pediatric non-Hodgkin lymphomas. In the WHO classification scheme pediatric LBL is considered to be the same disease entity as pediatric acute lymphoblastic leukemia (ALL). However, it is unclear whether the genetic basis of pediatric LBL development is similar to that of pediatric ALL. We performed genome-wide analyses of copy number aberrations in 12 T-LBL and 7 precursor B-cell LBL pediatric cases using high-resolution SNP-based array CGH. more...

Organism:

Homo sapiens

Type:

Genome variation profiling by SNP array; SNP genotyping by SNP array

Platform:

GPL3718

25 Samples

Download data: CEL, CHP

(Submitter supplied) Background: ETV6/RUNX1 (E/R) (also known as TEL/AML1) is the most frequent gene fusion in childhood acute lymphoblastic leukemia (ALL) and also most likely the crucial factor for disease initiation, whereas its role in leukemia propagation and maintenance remains largely elusive. To address this issue we performed a shRNA-mediated knock-down (KD) of the E/R fusion gene and investigated the ensuing consequences on genome-wide gene expression patterns and deducible regulatory functions in two E/R-positive leukemic cell lines. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Dataset:

GDS4298

Platform:

GPL570

10 Samples

Download data: CEL

Analysis of ETV6/RUNX1 (E/R) fusion gene-positive, BCP ALL cell lines (AT2 and REH) following E/R knockdown. E/R (also known as TEL/AML1) is the most frequent gene fusion in childhood ALL. Results provide insight into role of E/R gene fusion in leukemia propagation and maintenance.

Organism:

Homo sapiens

Type:

Expression profiling by array, transformed count, 2 cell line, 2 protocol sets

Platform:

GPL570

Series:

GSE29639

10 Samples

Download data: CEL

(Submitter supplied) PAX5 is a tumor suppressor in B-ALL, while the role of PAX5 fusion proteins in B-ALL development is largely unknown. Here we studied the function of PAX5-ETV6 and PAX5- FOXP1 in mice expressing these proteins from the Pax5 locus. Both proteins arrested Blymphopoiesis at the pro-B-to-pre-B cell transition and, contrary to their proposed dominantnegative role, did not interfere with the expression of most Pax5 target genes. more...

Organism:

Mus musculus

Type:

Expression profiling by high throughput sequencing; Genome binding/occupancy profiling by high throughput sequencing

Platforms:

GPL17021 GPL11002 GPL13112

36 Samples

Download data: BW, TXT

(Submitter supplied) We present here a genome-wide map of abnormalities found in diagnostic samples from 45 adults and adolescents with acute lymphoblastic leukemia (ALL). 500K single nucleotide polymorphism (SNP) array analysis uncovered frequent genetic abnormalities, with cryptic deletions constituting half of the detected changes, implying that microdeletions are a characteristic feature of this malignancy. Importantly, the pattern of deletions resembled that recently reported in pediatric ALL, suggesting that adult, adolescent, and childhood cases may be more similar on the genetic level than previously thought. more...

Organism:

Homo sapiens

Type:

Genome variation profiling by SNP array; SNP genotyping by SNP array

Platforms:

GPL3720 GPL2641 GPL3718

165 Samples

Download data: CEL, TXT

(Submitter supplied) Intrachromosomal amplification of chromosome 21 (iAMP21) defines a distinct subgroup of childhood B-cell precursor acute lymphoblastic leukemia (BCP-ALL) shown to have a dismal outcome on standard therapy. For improved diagnosis and prognosis of these patients, the initiating genetic events need to be elucidated. To investigate the genetic basis, the genomes of 94 iAMP21 patients were interrogated by genomic arrays, FISH and MLPA. more...

Organism:

Homo sapiens

Type:

Genome variation profiling by array

Platform:

GPL11340

18 Samples

Download data: TXT

(Submitter supplied) To examine the role of PAX5 alterations in leukemogenesis, we performed mutagenesis screens of mice heterozygous for a loss-of-function Pax5 allele. Both chemical and retroviral mutagenesis resulted in a significantly increased penetrance and reduced latency of leukemia, with a shift to B-lymphoid lineage. We observed a range of maturation of lymphoid tumors, and genomic profiling identified a high frequency of secondary genomic mutations, deletions and retroviral insertions targeting B-lymphoid development, including Pax5, and additional genes and pathways known to be mutated in ALL, including tumor suppressors, Ras and JAK-STAT signaling. more...

Organism:

Mus musculus

Type:

Genome variation profiling by genome tiling array

Platform:

GPL13131

39 Samples

Download data: TXT

(Submitter supplied) To identify cooperating lesions in core-binding-factor acute myeloid leukemia (CBF-AML), we performed single-nucleotide polymorphism (SNP)-array analysis on 300 diagnostic and 41 relapse adult and pediatric leukemia samples. We identified a mean of 1.28 copy number alterations (CNAs) per case at diagnosis in both patient populations. Recurrent minimally deleted regions (MDRs) were identified at 7q36.1 (7.7%), 9q21.13 (5%), 11p13 (2.3%), and 17q11.2 (2%). more...

Organism:

Homo sapiens

Type:

SNP genotyping by SNP array; Genome variation profiling by SNP array

Platform:

GPL6801

516 Samples

Download data: CEL

(Submitter supplied) Identification of chromosomal deletion and duplications in childhood acute lymphoblastic leukemia with t(12;21). This study was performed to correlate clinical parameters with chromosomal aberrations by array-CGH and to identify other potential novel cancer genes involved in leukaemia. In brief, PALL-6 was a Malay male diagnosed with B-ALL, had undergone a remission but late relapse and passed away. more...

Organism:

Homo sapiens

Type:

Genome variation profiling by genome tiling array

Platform:

GPL4091

11 Samples

Download data: TXT

(Submitter supplied) Early immature T-cell acute lymphoblastic leukemias (T-ALLs) account for about 5-10% of pediatric T-ALLs and are associated with poor prognosis. However, the genetic defects that drive the biology of these tumors remain largely unknown. Analysis of microarray gene expression signatures in adult T-ALL demonstrated a high prevalence of early immature leukemias and revealed a close relationship between these tumors and myeloid leukemias. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL570

20 Samples

Download data: CEL

(Submitter supplied) Transcriptional effects of ETV6 inactivation in immature T-ALL were investigated by gene expression analysis upon siRNA-mediated knockdown of ETV6 in LOUCY cells, a T-ALL cell line with a transcriptional program highly related to that of immature T-ALLs. Gene Set Enrichment Analysis (GSEA) of the ETV6 knockdown signature showed a significant enrichment in genes characteristically upregulated in ETV6 mutant immature T-ALLs including HOXA13, PRDM16, PTEN and CD33.

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL10558

4 Samples

Download data: TXT

(Submitter supplied) Analysis of microarray gene expression signatures in adult T-ALL demonstrated a high prevalence of early immature leukemias and revealed a close relationship between these tumors and myeloid leukemias.

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL10558

57 Samples

Download data: TXT

(Submitter supplied) Pediatric acute lymphoblastic leukemia (ALL) contains cytogenetically distinct subtypes that respond differently to cytotoxic drugs. Subtype classification can be also achieved through gene expression profiling. However, how to apply such classifiers to a single patient and correctly diagnose the disease subtype in an independent patient group has not been addressed. Furthermore, the underlying regulatory mechanisms responsible for the subtype-specific gene expression patterns are still largely unknown. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL571

101 Samples

Download data: CEL