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Mus musculus
8 Downloadable Samples
Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
Transcriptional dysregulation plays a major role in the pathology of Huntington's disease (HD). However, the mechanisms causing selective downregulation of genes remain unknown. Histones regulate chromatin structure and thereby control gene expression; recent studies have demonstrated a therapeutic role for histone deacetylase (HDAC) inhibitors in polyglutamine diseases. This study demonstrates that despite no change in overall acetylated histone levels, histone H3 is hypo-acetylated at promoters of downregulated genes in R6/2 mice, ST14a and STHdh cells, as demonstrated by in vivo chromatin immunoprecipitation. In addition, HDAC inhibitor treatment increases association of acetylated histones with downregulated genes and corrects mRNA abnormalities. In contrast, there is a decrease in mRNA levels in wild-type cells following treatment with a histone acetyltransferase inhibitor. Although changes in histone acetylation correlate with decreased gene expression, histone hypo-acetylation may be a late event, as no hypo-acetylation is observed in 4-week-old R6/2 mice. Nevertheless, treatment with HDAC inhibitors corrects mRNA abnormalities through modification of histone proteins and may prove to be of therapeutic value in HD.
Publication Title
Histones associated with downregulated genes are hypo-acetylated in Huntington's disease models.
Sample Metadata Fields
No sample metadata fields
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SRP075376- Homo sapiens
- 12 Downloadable Samples
Illumina HiSeq 2000
Description
Paired-end sequencing of Vector and H-Ras expressing cell lines: p53-del and WT-p53 We found that activated forms of H-Ras and PIK3CA oncogene lead to repression of p63, a p53 family member. They also lead to induction of EMT, a cancer-related process. Our results suggest that, through Ras regulation of p63, this oncogene can drive mammary epithelial cells towards greater invasive ability. Overall design: 4 samples analyzed with 3 replicates each, control samples for each H-Ras line are the Vector cell line created at the same time
Publication Title
Repression of p63 and induction of EMT by mutant Ras in mammary epithelial cells.
Sample Metadata Fields
Cell line, Subject
View Samples- Homo sapiens
- 53 Downloadable Samples
- NextSeq 500
Description
Activation of identity determining transcription factors (TFs), or core regulatory TFs, is governed by cell-type specific enhancers, an important subset of these being super enhancers (SEs). This mechanism is distinct from constitutive expression of housekeeping genes. The characterization of drug-like small molecules to selectively inhibit core regulatory circuitry is of high interest for treatment of cancers, which are addicted to core regulatory TF function at SEs. Surprisingly, we find histone deacetylases (HDAC) to be an indispensable component of SE-driven transcription. While histone acetylation is a marker for active genes, over accumulation of acetylation selectively halts core regulatory transcription. We show this conundrum may in part be explained by a SE-specific need for resetting histones to maintain SE boundaries, to facilitate enhancer-promoter looping and high levels of transcription. Overall design: RNA-seq data for FP-RMS cells treated with various concentrations of various small molecules modulators of epigenetic processes.
Publication Title
Chemical genomics reveals histone deacetylases are required for core regulatory transcription.
Sample Metadata Fields
Specimen part, Cell line, Treatment, Subject
View Samples- Mus musculus, Homo sapiens
- 4 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
MEK inhibition induces MYOG and remodels super-enhancers in RAS-driven rhabdomyosarcoma.
Sample Metadata Fields
Treatment, Time
View Samples- Mus musculus
- 4 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
C2C12 mouse myoblasts expressing RAS mutants identified in human tumors fail to differentiate in low serum media.
Publication Title
MEK inhibition induces MYOG and remodels super-enhancers in RAS-driven rhabdomyosarcoma.
Sample Metadata Fields
No sample metadata fields
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