This SuperSeries is composed of the SubSeries listed below.
ZFP36L2 is required for self-renewal of early burst-forming unit erythroid progenitors.
Specimen part
View SamplesEarly erythroid progenitors were isolated from mouse E14.5 fetal liver. After cell lysing, control IgG or RBP specific antibody were incubated with cell lysis. Immunoprecipitation followed by microarray experiments were carried out to identify transcripts that are immunoprecipitated by either control IgG or RBP specific antibody.
ZFP36L2 is required for self-renewal of early burst-forming unit erythroid progenitors.
Specimen part
View SamplesMicroarrays were used to determine relative global gene expression changes upon introduction of EMT-inducing or control vectors.
Core epithelial-to-mesenchymal transition interactome gene-expression signature is associated with claudin-low and metaplastic breast cancer subtypes.
Specimen part
View SamplesScreens for agents that specifically kill epithelial cancer stem cells (CSCs) have not been possible due to the rarity of these cells within tumor cell populations and their relative instability in culture. We describe here an approach to screening for agents with epithelial CSC-specific toxicity. We implemented this method in a chemical screen and discovered compounds showing selective toxicity for breast CSCs. One compound, salinomycin, reduces the proportion of CSCs by >100-fold relative to paclitaxel, a commonly used breast cancer chemotherapeutic drug. Treatment of mice with salinomycin inhibits mammary tumor growth in vivo and induces increased epithelial differentiation of tumor cells. In addition, global gene expression analyses show that salinomycin treatment results in the loss of expression of breast CSC genes previously identified by analyses of breast tissues isolated directly from patients. This study demonstrates the ability to identify agents with specific toxicity for epithelial CSCs
Identification of selective inhibitors of cancer stem cells by high-throughput screening.
Specimen part
View SamplesThis SuperSeries is composed of the SubSeries listed below.
mRNA destabilization is the dominant effect of mammalian microRNAs by the time substantial repression ensues.
Sex, Age, Specimen part, Cell line, Treatment, Time
View SamplesThis SuperSeries is composed of the SubSeries listed below.
HSF1 drives a transcriptional program distinct from heat shock to support highly malignant human cancers.
Specimen part, Cell line, Treatment
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Core transcriptional regulatory circuit controlled by the TAL1 complex in human T cell acute lymphoblastic leukemia.
Disease, Cell line
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Tight coordination of protein translation and HSF1 activation supports the anabolic malignant state.
Specimen part, Cell line, Treatment
View SamplesThe oncogenic transcription factor TAL1/SCL is aberrantly overexpressed in over 40% of cases of T-cell acute lymphoblastic leukemia (T-ALL), emphasizing the importance of the TAL1-regulated transcriptional program in the molecular pathogenesis of T-ALL. Here we identify the core transcriptional regulatory circuit controlled by TAL1 and its regulatory partners HEB, E2A, GATA3, ETS1 and RUNX1 in T-ALL cells. We find that TAL1 forms an interconnected auto-regulatory loop with its partners, which contributes to the sustained upregulation of its direct target genes. Importantly, we also find the MYB oncogenic transcription factor is directly activated by the TAL1 complex and positively regulates many of the same target genes, thus forming a feed-forward positive regulatory loop that further promotes the TAL1-regulated oncogenic program.
Core transcriptional regulatory circuit controlled by the TAL1 complex in human T cell acute lymphoblastic leukemia.
Cell line
View SamplesHeat-Shock Factor 1 (HSF1), master regulator of the heat-shock response, facilitates malignant transformation, cancer cell survival and proliferation in model systems. The common assumption is that these effects are mediated through regulation of heat-shock protein (HSP) expression. However, the transcriptional network that HSF1 coordinates directly in malignancy and its relationship to the heat-shock response have never been defined. By comparing cells with high and low malignant potential alongside their non-transformed counterparts, we identify an HSF1-regulated transcriptional program specific to highly malignant cells and distinct from heat shock. Cancer-specific genes in this program support oncogenic processes: cell-cycle regulation, signaling, metabolism, adhesion and translation. HSP genes are integral to this program, however, even these genes are uniquely regulated in malignancy. This HSF1 cancer program is active in breast, colon and lung tumors isolated directly from human patients and is strongly associated with metastasis and death. Thus, HSF1 rewires the transcriptome in tumorigenesis, with prognostic and therapeutic implications.
HSF1 drives a transcriptional program distinct from heat shock to support highly malignant human cancers.
Cell line, Treatment
View Samples