Project description:Gene expression profiling of immortalized human mesenchymal stem cells with hTERT/E6/E7 transfected MSCs. hTERT may change gene expression in MSCs. Goal was to determine the gene expressions of immortalized MSCs.

2010-09-25 | GSE24338 | GEO

shRNA profiling of human DZNep-treated glioblastoma multiforme cancer stem cells

Project description:Overexpression of the Polycomb group protein Enhancer of Zeste Homolog 2 (EZH2) occurs in diverse malignancies, including prostate cancer, breast cancer, and glioblastoma multiforme (GBM) (1). Based on its ability to modulate transcription of key genes implicated in cell cycle control, DNA repair and cell differentiation, EZH2 is believed to play a crucial role in tissue-specific stem cell maintenance and tumor development. Here we show that targeted pharmacologic disruption of EZH2 by the S-adenosylhomocysteine hydrolase inhibitor 3-Deazaneplanocin A (DZNep), or its specific down-regulation by shRNA, strongly impairs GBM cancer stem cell self-renewal in vitro and tumor-initiating capacity in vivo. Using genome-wide expression analysis of DZNep-treated GBM cancer stem cells, we found the expression of c-myc, recently reported to be essential for GBM cancer stem cells, to be strongly repressed upon EZH2 depletion. Specific shRNA-mediated down-regulation of EZH2 in combination with chromatin immunoprecipitation (ChIP) experiments revealed that c-myc is a direct target of EZH2 in GBM cancer stem cells. Taken together, our observations provide evidence that direct transcriptional regulation of c-myc by EZH2 may constitute a novel mechanism underlying GBM cancer stem cell maintenance and suggest that EZH2 may be a valuable new therapeutic target for GBM management. Experiment Overall Design: Three samples of cancer stem-cell enriched gliospheres from primary glioblastoma multiforme cell cultures were treated with DZNep. Untreated gliospheres from the same cultures were used as controls.

2009-12-14 | E-GEOD-18150 | biostudies-arrayexpress

Homo sapiens

Project description:miR363-3p Mediates Maintenance and Chemoresistance of Breast Cancer Stem Cells

| PRJNA362190 | ENA

Homo sapiens MSCs: Normoxia vs. Hypoxia

Project description:Transcriptional profiling of human mesenchymal stem cells comparing normoxic MSCs cells with hypoxic MSCs cells. Hypoxia may inhibit senescence of MSCs during expansion. Goal was to determine the effects of hypoxia on global MSCs gene expression.

2011-02-19 | GSE20463 | GEO

Homo sapiens

Project description:ERN1 and ALPK1 inhibit differentiation of bi-potential tumor-initiating cells in human breast cancer

| PRJNA316483 | ENA

Homo sapiens

Project description:Erythropoietin promotes breast tumorigenesis through tumor initiating cell self-renewal

| PRJNA224091 | ENA

Homo sapiens immortalized MSCs: 3A6

2010-09-25 | E-GEOD-24338 | biostudies-arrayexpress