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SRP181857
Drosophila melanogaster
41 Downloadable Samples
Illumina HiSeq 2000
Description
Control of metazoan embryogenesis shifts from maternal to zygotic gene products as the zygotic genome becomes transcriptionally activated. In Drosophila, zygotic genome activation (ZGA) begins with a minor wave, but technical challenges have hampered the identification of early transcripts or obscured the onset of their transcription. Here, we develop an approach to isolate transcribed mRNAs and apply it over the course of the minor wave and the start of the major wave of Drosophila ZGA. Our results increase known genes of the minor wave by 10 fold and show that this wave is continuous and gradual. Transposable-element mRNAs are also produced, but discontinuously. Genes in the early and middle part of the minor wave are short with few if any introns, and their transcripts are frequently aborted and tend to have retained introns, suggesting that inefficient splicing as well as rapid cell divisions constrain the lengths of early transcripts. Overall design: The goal of this study is to use NGS to identify zygotic transcripts produced during early zygotic genome activation in Drosophila.
Publication Title
Early genome activation in <i>Drosophila</i> is extensive with an initial tendency for aborted transcripts and retained introns.
Sample Metadata Fields
Subject
View Samples- Arabidopsis thaliana
- 12 Downloadable Samples
Affymetrix Arabidopsis ATH1 Genome Array (ath1121501)
Description
Two nuclear 5'-3' exonucleases XRN2/3 in Arabidopsis thaliana are homologs of the yeast and human Rat1/Xrn2, which are involved in degradation and processing of several classes of nuclear RNAs and in transcription termination of RNA polymerase II. Here we show that knockdown of XRN3 leads to altered expression of several hundred of the Arabidopsis genes and accumulation of new non-coding RNAs. Using strand-specific short read sequencing we reveal a widespread accumulation of intergenic transcripts in xrn3 mutants. These non-coding XAT (xrn3-associated transcripts) RNAs are generated by Pol II read-through transcription and are usually polyadenylated and lack the 5' cap structure. We show that XRN3-mediated changes in expression of a subset of genes are related to XAT transcription and may be enhanced by XAT-mRNA chimeras produced in xrn3 plants while antisense XATs may trigger siRNA production. Our results highlight the important role of the Rat1/Xrn2 5'-3' exoribonucleases in the torpedo mechanism of Pol II transcription termination and show that a global disturbance in this process significantly impacts both gene expression and transcriptome integrity.
Publication Title
Defective XRN3-mediated transcription termination in Arabidopsis affects the expression of protein-coding genes.
Sample Metadata Fields
Age, Specimen part, Time
View Samples- Arabidopsis thaliana
- 4 Downloadable Samples
- Affymetrix Arabidopsis ATH1 Genome Array (ath1121501)
Description
The aim was to identify early target genes of the senescence-associated transcription factor: ORS1. For this purpose we used DEX-inducible system and studied the expression profile 5h after treatment using Affymetrix microarray.
Publication Title
ORS1, an H₂O₂-responsive NAC transcription factor, controls senescence in Arabidopsis thaliana.
Sample Metadata Fields
Specimen part
View Samples- Homo sapiens
- 147 Downloadable Samples
- Affymetrix Human Exon 1.0 ST Array [transcript (gene) version (huex10st)
Description
Molecular and genomic analysis of microscopic quantities of tumor from formalin-fixed and paraffin-embedded (FFPE) biopsies has many unique challenges. Here we evaluated the feasibility of obtaining transcriptome-wide RNA expression to measure prognostic classifiers from diagnostic prostate needle core biopsies.
Publication Title
Application of a Clinical Whole-Transcriptome Assay for Staging and Prognosis of Prostate Cancer Diagnosed in Needle Core Biopsy Specimens.
Sample Metadata Fields
Specimen part, Subject
View Samples- Homo sapiens
- 59 Downloadable Samples
- IlluminaHiSeq2000, IlluminaMiSeq
Description
Establishment and application of RNAseq based transcriptome analayis on an archivaed bladder cancer cohort. Overall design: Total RNA profilling 61 archived bladder cancer samples and comparison of 4 pairs of fresh frozen and FFPE bladder cancer samples.
Publication Title
Next-generation RNA sequencing of archival formalin-fixed paraffin-embedded urothelial bladder cancer.
Sample Metadata Fields
No sample metadata fields
View Samples- Homo sapiens
- 12 Downloadable Samples
- Affymetrix Human Gene 1.0 ST Array (hugene10st)
Description
Analysis of the human monocyte-derived macrophage (hMDM) transcriptional response to L. pneumophila infection at 8 hours post-infection
Publication Title
The transcriptome of Legionella pneumophila-infected human monocyte-derived macrophages.
Sample Metadata Fields
Specimen part
View Samples- Mus musculus
- 24 Downloadable Samples
- Illumina HiSeq 2500
Description
In cell stress, mRNA in the cytoplasm is sequestered to the insoluble ribonucleoprotein (RNP) compartments containing stress granules. These RNP granules are known to be involved in the control of mRNA processing and decay, but it has been elusive whether the mRNA redistribution in cell stress is universal or specific to a subset of transcripts. Here we provide a transcriptome-wide profiles of the RNP granules in cell stress and show that mRNA accumulation in stress granule differentially affects individual transcripts. mRNA species accumulated in stress granules are largely conserved across distinct stress types, such as in endoplasmic reticulum stress, heat shock and arsenic stress. Many mRNA species involved in cell survival and proliferation are more dynamically redistributed, suggesting that mRNA sequestration can be a specific response mechanism through which cells can reshape the landscape of their transcriptome and affect the cell fate determination in stress conditions . Overall design: 24 samples are analyzed, which include 3 replicates for control (DMSO) cytoplasmic fraction, 3 replicates of control (DMSO) RNP granule fraction, 3 replicates of Thapsigargin treated cytoplasmic fraction, 3 replicates of Thapsigargin treated RNP granule fraction, 2 replicates of control (H2O) cytoplasmic fraction, 2 replicates of control (H2O) RNP granule fractions, 2 replicates of heat shock (HS) treated cytoplsmic fraction (HS), 2 replicates of heat shock (HS) treated RNP granule fraction, 2 replicates of arsenite treated cytoplasmic fraction, and 2 replicates of arsenite treated RNP granule fraction.
Publication Title
Systematic Characterization of Stress-Induced RNA Granulation.
Sample Metadata Fields
Cell line, Treatment, Subject
View Samples- Mus musculus
- 7 Downloadable Samples
- Illumina Genome Analyzer II
Description
An immortalized multipotent otic progenitor (iMOP) cell was generated by transient expression of c-Myc in Sox2-expressing otic progenitor cells. The procedure activated endogenous c-Myc expression in the cells and amplified existing Sox2-dependent transcripts to promote self-renewal. Downregulation of c-Myc expression following growth factor withdrawal resulted in a molecular switch from self-renewal to otic differentiation. Overall design: Progenitor cells from embryonic inner ear that form otospheres were infected with a c-Myc retrovirus to promote self-renewal
Publication Title
SHIELD: an integrative gene expression database for inner ear research.
Sample Metadata Fields
No sample metadata fields
View Samples- Escherichia coli k-12
- 2 Downloadable Samples
- Affymetrix E. coli Genome 2.0 Array (ecoli2)
Description
Persister cells are a sub-population of all bacterial cultures which exhibit a non-inheritable, multi-drug tolerance when subjected to lethal antibiotic challenge. These persisters arise as a result of metabolic dormancy, and can resume growth subsequent to antibiotic challenge, leading to recalcitrance of bacterial infections.
Publication Title
Phosphodiesterase DosP increases persistence by reducing cAMP which reduces the signal indole.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 9 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
The Lim1 gene has essential functions during several stages of kidney development. In particular, a tissue specific knockout in the early metanephric mesenchyme results in the formation of the earliest nephron precursor, the renal vesicle, but failure of this structure to progress to the next stage, the comma shaped body. To better understand the molecular nature of this developmental arrest we used a laser capture microdissection-microarray strategy to examine the perturbed gene expression pattern of the mutant renal vesicles. Among the genes found differently expressed were Chrdl2, an inhibitor of BMP signaling, the pro-apoptotic factor Bmf, as well as myob5, an atypical myosin which modulates chemokine and transferring signaling, and pdgfr1, which is important in epithelial folding. Of particular interest, the microarray data indicated that the Dkk1 gene, which encodes an inhibitor of Wnt signaling, was downregulated nine fold in mutants. This was confirmed by in situ hybridizations. It is interesting to note that Lim1 and Dkk1 mutant mice have striking similarities in phenotype. These results suggest that the Dkk1 gene might be a key downstream effector of Lim1 function.
Publication Title
Laser capture-microarray analysis of Lim1 mutant kidney development.
Sample Metadata Fields
No sample metadata fields
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