Expression analyses of glioblastoma derived neurosphere cultures
Ontology highlight
ABSTRACT: Recent studies demonstrated that tumor cells with stem cell-like properties can be cultured from human glioblastomas by using conditions that select for the expansion of neural stem cells. We established glioblastoma stem-like (GS-) cell cultures from 9 different glioblastomas, 8 of which generated stably expandable cell lines. Analyzing GS-cell cultures, we discovered two clearly discernable phenotypes. Microarray analysis showed that the 4 GSf cell lines shared expression profiles dominated by genes involved in nervous system development and neuropeptide signaling, while the 5 GSr lines shared expression signatures enriched for extracellular matrix-proteins. Keywords: Cell line comparison
Project description:Recent studies demonstrated that tumor cells with stem cell-like properties can be cultured from human glioblastomas by using conditions that select for the expansion of neural stem cells. We established glioblastoma stem-like (GS-) cell cultures from 9 different glioblastomas, 8 of which generated stably expandable cell lines. Analyzing GS-cell cultures, we discovered two clearly discernable phenotypes. Microarray analysis showed that the 4 GSf cell lines shared expression profiles dominated by genes involved in nervous system development and neuropeptide signaling, while the 5 GSr lines shared expression signatures enriched for extracellular matrix-proteins. Experiment Overall Design: Affymetrix HG-U133 Plus 2.0 chips were employed for expression profiling from 9 different glioblasoma derived neurosphere cultures in two biological replicates.
Project description:We compared a large panel of human glioblastoma stem-like (GS) cell lines, corresponding primary tumors and conventional glioma cell lines to identify cell lines that preserve the transcriptome of human glioblastomas most closely, thereby allowing identification of shared therapeutic targets. We used Affymetrix HG-U133 Plus 2.0 microarrays to compare human glioblastoma stem-like (GS) cell lines, corresponding primary tumors and conventional glioma cell lines. We extracted total RNA from 32 conventional glioma cell lines, 12 GS cell lines (8 in two different passages), 7 clonal sublines derived from two GS lines, 12 original tumors, and 4 monolayer cultures established from the same tumors as GS-lines using standard serum conditions.
Project description:We compared a large panel of human glioblastoma stem-like (GS) cell lines, corresponding primary tumors and conventional glioma cell lines to identify cell lines that preserve the transcriptome of human glioblastomas most closely, thereby allowing identification of shared therapeutic targets. We used Affymetrix HG-U133 Plus 2.0 microarrays to compare human glioblastoma stem-like (GS) cell lines, corresponding primary tumors and conventional glioma cell lines.
Project description:Mice lacking Cdkn1c (p57) in spermatogonia were found to be congenitally infertile due to spermatogonia depletion. Transplantation experiments showed that Cdkn1c deficiency compromised spermatogonial stem cells (SSC) activity. SSCs undergo self-renewal division to sustain spermatogenesis, and it is possible to derive germline stem (GS) cell cultures by supplementing GDNF and FGF2. We examined the influence of Cdkn1c depletion on gene expression of GS cells. In this dataset, we include the expression data obtained from cultured spermatogonia (GS cells) derived from Cdkn1c(p57) floxed/floxed mice. Cdkn1c(p57) floxed/floxed GS cells were treated with adenovirus cre recombinase. Each group contains 3 biological replicates.
Project description:Gibberella stalk rot (GSR) caused by Fusarium graminearum is one of the most devastating diseases causing significant yield loss of maize, and GSR resistance is a quantitative trait controlled by multiple genes. Although a few QTLs/resistance genes have been identified, the molecular mechanisms underlying GSR resistance remain largely unexplored. To identify potential resistance genes and to better understand the molecular mechanism of GSR resistance, a transcriptomic was conducted using two inbred lines with contrast GSR resistance, K09 (resistant) and A08 (susceptible) upon infection with F. graminearum. While substantial number of differentially expressed genes (DEGs) associated with various defense-related signaling pathways were identified between two lines, multiple hub genes likely associated with GSR resistance were pinpointed using Weighted Gene Correlation Network Analysis (WGCNA). ZmHIR3 showed strong correlation with multiple key genes.
Project description:Spermatogonial stem cells (SSCs) undergo self-renewal division to sustain spermatogenesis. Although it is possible to derive germline stem (GS) cell cultures from most of the mouse strains by supplementing GDNF and FGF2, SSCs from a 129 background do not proliferate under the same culture conditions, which suggested that they have distinct self-renewal requirements. We modified previous culture conditions and established long-term culture of SSCs of 129 mice. 129 GS cells reinitiated spermatogenesis and produced offspring following transplantation into the seminiferous tubules of infertile mouse recipients. This dataset show the differences of gene expressions of GS cells between C57BL/6 and 129 mice, which have important implications in understanding requirements of self-renewal mechanisms. In this dataset, we include the expression data obtained from cultured spermatogonia (GS cells) derived from C57BL/6, and 129 mice. Each group contains 2 biological replicates.
Project description:Glioblastomas (GBMs), which are the most deadly malignant brain tumors of children and adults, infiltrate the brain and grow rapidly, and are resistant to current therapies. Glioblastomas (GBMs) frequently display mutations that activate receptor tyrosine kinases (RTKs), such as EGFR, which are thought to cooperate with additional factors to drive tumorigenesis. To identify and characterize genetic pathways that cooperate with RTKs to drive GBM progression, we performed RNA sequencing on several cell cultures created from surgical specimens from tumors with alterations in RTKs, and these cultures were grown as neurospheres in serum-free media used for normal neural stem/progenitor cell cultures. Under these conditions, GBM cells retain many defining features and mutations found in primary tumors. For comparison, we profiled commercially available human normal neural stem cells (HNPCs), which were grown under the same conditions. Data from these cell cultures was analyzed for transcripts differentially expressed between GBM cells and HNPCs, which showed that GBM cells that show RTK alterations strongly overexpressed the PDGFA and IGF2 secreted factors, which likely cooperate with EGFR to drive tumor progression.
Project description:Putative neural stem cells were derived from E12-E14 stiatal tissue and that was cultured for 10-12 dy s in neural stem cell media supplemented with bFGF Keywords: other
Project description:This SuperSeries is composed of the following subset Series: GSE14818: Gene expression analysis of glioblastoma spheroid cultures I GSE14819: Array CGH analysis of glioblastoma serum grown adherent cultures GSE14820: Array CGH analysis of glioblastoma cell lines GSE14821: Array CGH analysis of single spheroids from glioblastoma spheroid cultures GSE14822: Array CGH analysis of glioblastoma spheroid cultures GSE14823: Array CGH analysis of glioblastomas GSE16666: Gene expression analysis of glioblastoma spheroid cultures II Refer to individual Series