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Title: Gene expression profiles of AML derived stem cells: similarity to hematopoietic stem cells      
dateReleased:
12-01-2011
description:
Tumors contain a fraction of cancer stem cells that maintain the propagation of the disease. The CD34‏CD38_ cells, isolated from acute myeloid leukemia (AML), were shown to be enriched leukemic stem cells (LSC). We isolated the CD34‏CD38_ cell fraction from AML and compared their gene expression profiles to the CD34‏CD38‏ cell fraction, using microarrays. We found 409 genes that were at least twofold over- or underexpressed between the two cell populations. These include underexpression of DNA repair, signal transduction and cell cycle genes, consistent with the relative quiescence of stem cells, and chromosomal aberrations and mutations of leukemic cells. Comparison of the LSC expression data to that of normal hematopoietic stem cells (HSC) revealed that 34% of the modulated genes are shared by both LSC and HSC, supporting the suggestion that the LSC originated within the HSC progenitors. We focused on the Notch pathway since Jagged-2, a Notch ligand was found to be overexpressed in the LSC samples. We show that DAPT, an inhibitor of gamma-secretase, a protease that is involved in Jagged and Notch signaling, inhibits LSC growth in colony formation assays. Identification of additional genes that regulate LSC self-renewal may provide new targets for therapy. Microarrays were used to compare the gene expression patterns between AML CD34+CD38- cells and AML CD34+CD38+
privacy:
not applicable
aggregation:
instance of dataset
ID:
E-GEOD-34044
refinement:
raw
alternateIdentifiers:
34044
keywords:
functional genomics
dateModified:
12-15-2011
availability:
available
types:
gene expression
name:
Homo sapiens
ID:
A-AFFY-37
name:
Affymetrix GeneChip Human Genome U133A 2.0 [HG-U133A_2]
accessURL: https://www.ebi.ac.uk/arrayexpress/files/E-GEOD-34044/E-GEOD-34044.raw.1.zip
storedIn:
ArrayExpress
qualifier:
gzip compressed
format:
TXT
accessType:
download
authentication:
none
authorization:
none
accessURL: https://www.ebi.ac.uk/arrayexpress/files/E-GEOD-34044/E-GEOD-34044.processed.1.zip
storedIn:
ArrayExpress
qualifier:
gzip compressed
format:
TXT
accessType:
download
authentication:
none
authorization:
none
accessURL: https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE34044
storedIn:
Gene Expression Omnibus
qualifier:
not compressed
format:
HTML
accessType:
landing page
primary:
true
authentication:
none
authorization:
none
abbreviation:
EBI
homePage: http://www.ebi.ac.uk/
ID:
SCR:004727
name:
European Bioinformatics Institute
homePage: https://www.ebi.ac.uk/arrayexpress/
ID:
SCR:002964
name:
ArrayExpress

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