Homo sapiens
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA156893 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:FOXO transcription factors are key players in diverse cellular processes affecting tumorigenesis, stem cell maintenance and lifespan. To gain insight into mechanisms of FOXO regulated target gene expression, we studied genome-wide effects of FOXO3 activation. Profiling RNA polymerase II changes shows FOXO3 regulates gene expression through transcription initiation. Correlative analysis of FOXO3 and RNA polymerase II ChIP-seq profiles demonstrates FOXO3 to act as a transcriptional activator. Furthermore, this analysis reveals a significant part of FOXO3 gene regulation proceeds through enhancer regions. FOXO3 binds to pre-existing enhancers and further activates these enhancers as shown by changes in histone acetylation and RNA polymerase II recruitment. In addition, FOXO3-mediated enhancer activation correlates with regulation of adjacent genes and pre-existence of chromatin loops between FOXO3 bound enhancers and target genes. Combined, our data elucidate how FOXOs regulate gene transcription and provide insight into mechanisms by which FOXOs can induce different gene expression programs depending on chromatin architecture. Paper with published gene expression: PMID 22139133. Examination of FOXO3 binding and changes in RNAPII occupancy (0, 4, 24 hours after induction) in colorectal cell line
2012-11-15 | E-GEOD-35486 | biostudies-arrayexpress
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Project description:FOXO transcription factors are key players in diverse cellular responses affecting tumorigenesis, stem cell maintenance and lifespan. To gain insight into mechanisms of FOXO regulated gene expression, we studied genome-wide effects of FOXO3 activation. Profiling RNA polymerase II (RNAPII) changes shows FOXO3 regulates gene expression through transcription initiation. Correlative analysis of FOXO3 and RNAPII ChIP-seq profiles demonstrates FOXO3 to act as a transcriptional activator. Furthermore, this analysis reveals a significant part of FOXO3 gene regulation proceeds through enhancer regions. FOXO3 binds to and activates enhancers as shown by the presence of and changes in enhancer-specific histone modifications and RNAPII occupancy. In addition, FOXO3-mediated enhancer regulation correlates with regulation of adjacent genes and existence of chromatin loops between FOXO3 bound enhancers and regulated genes. Combined, our data elucidate how FOXOs regulate gene transcription and provide insight into mechanisms by which FOXOs can induce different gene expression programs depending on chromatin architecture. seven 4C view point were analyzed on DLD1 colon carcinoma cells containing 4OH-Tamoxifen inducible FOXO3A3-ER (DL23 cells, Kops et al., 2002, Mol Cell Biol), to investigate 3D topology around FOXO3 bound regions and FOXO3 regulated genes before and 4 hours after addition of tamoxifen. 4C procedure, as published before (Splinter et al., 2001, Genes Dev). Cells are cross linked using 1% formaldehyde for 10min at room temperature, nuclei are isolated, after which chromatin is digested with DpnII and subsequently ligated under diluted conditions. After reversal of the cross links the DNA is purified and treated with the second restriction enzyme treatment (Csp). After a second re-ligation step the sample is purified and ligated fragments are analyzed by inverse PCR.
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Project description:FOXO transcription factors are key players in diverse cellular processes affecting tumorigenesis, stem cell maintenance and lifespan. To gain insight into mechanisms of FOXO regulated target gene expression, we studied genome-wide effects of FOXO3 activation. Profiling RNA polymerase II changes shows FOXO3 regulates gene expression through transcription initiation. Correlative analysis of FOXO3 and RNA polymerase II ChIP-seq profiles demonstrates FOXO3 to act as a transcriptional activator. Furthermore, this analysis reveals a significant part of FOXO3 gene regulation proceeds through enhancer regions. FOXO3 binds to pre-existing enhancers and further activates these enhancers as shown by changes in histone acetylation and RNA polymerase II recruitment. In addition, FOXO3-mediated enhancer activation correlates with regulation of adjacent genes and pre-existence of chromatin loops between FOXO3 bound enhancers and target genes. Combined, our data elucidate how FOXOs regulate gene transcription and provide insight into mechanisms by which FOXOs can induce different gene expression programs depending on chromatin architecture. Paper with published gene expression: PMID 22139133.
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Project description:FOXO transcription factors are key players in diverse cellular responses affecting tumorigenesis, stem cell maintenance and lifespan. To gain insight into mechanisms of FOXO regulated gene expression, we studied genome-wide effects of FOXO3 activation. Profiling RNA polymerase II (RNAPII) changes shows FOXO3 regulates gene expression through transcription initiation. Correlative analysis of FOXO3 and RNAPII ChIP-seq profiles demonstrates FOXO3 to act as a transcriptional activator. Furthermore, this analysis reveals a significant part of FOXO3 gene regulation proceeds through enhancer regions. FOXO3 binds to and activates enhancers as shown by the presence of and changes in enhancer-specific histone modifications and RNAPII occupancy. In addition, FOXO3-mediated enhancer regulation correlates with regulation of adjacent genes and existence of chromatin loops between FOXO3 bound enhancers and regulated genes. Combined, our data elucidate how FOXOs regulate gene transcription and provide insight into mechanisms by which FOXOs can induce different gene expression programs depending on chromatin architecture.
2012-12-30 | GSE36835 | GEO
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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. One-condition experment, gene expression of 3A6
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