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Caenorhabditis elegans
24 Downloadable Samples
Illumina HiSeq 2500
Description
Adenosine deaminases that act on RNA (ADARs) catalyze the conversion of adenosine to inosine in dsRNA. C. elegans ADARs, ADR-1 and ADR-2, promote the expression of genes containing dsRNA structures by preventing their processing into siRNAs and silencing by RNAi. The 26G endogenous siRNA (endo-siRNA) pathway generates a subset of siRNAs distinct from those made in adr-1;adr-2 mutants, but using many of the same factors. We found that adr-1;adr-2;rrf-3 mutants, lacking both ADARs and the RNA-dependent RNA polymerase RRF-3 required for the 26G pathway, display a bursting phenotype rescued by the RNAi factors RDE-1 and RDE-4. To determine what gene expression changes underlie the synthetic phenotype of adr-1;adr-2;rrf-3 mutants, we sequenced poly(A)+ RNA from adr-1;adr-2;rrf-3 embryos, their parent strains, and strains rescued with mutations in rde-1 and rde-4. We found that genes associated with edited structures were robustly downregulated in adr-1;adr-2;rrf-3 mutants in a manner partially dependent on rde-1 and rde-4. Additionally, genes induced during Orsay virus infections were induced in rrf-3 mutants and further upregulated in adr-1;adr-2;rrf-3 mutants, again dependent in part on rde-1 and rde-4. Overall design: RNAseq of poly(A)+ RNA from C.elegans mixed-stage embryos, four biological replicates per genotype, six genotypes: wildtype (Bristol N2), adr-1(uu49);adr-2(uu28), rrf-3(uu56), adr-1(uu49);adr-2(uu28);rrf-3(uu56), adr-1(uu49);adr-2(uu28);rrf-3(uu56);rde-1(uu51), and adr-1(uu49);adr-2(uu28);rrf-3(uu56);rde-4(uu53).
Publication Title
<i>C. elegans</i> ADARs antagonize silencing of cellular dsRNAs by the antiviral RNAi pathway.
Sample Metadata Fields
Subject
View Samples- Mus musculus
- 54 Downloadable Samples
- Illumina HiSeq 2500
Description
To investigate the relationship between histones, chaperone function, and cataracts, we performed RNA-seq, isothermal titration calorimetry (ITC), size-exclusion chromatography, and gel electrophoresis of histones. The RNA-seq of postnatal lenses from 2-day-old cryaa -R49C mice revealed increased histone gene expression, suggesting that a a-crystallin mutation regulates histones via a transcriptional mechanism . Overall design: RNA-seq studies on lenses of 2-day-old wild-type and 2-day-old cryaa-R49C heterozygous mutant and cryaa-R49C homozygous mutant knock-in mice; and 14-day old wild-type and 14-day-old cryab-R120G heterozygous mutant and cryab-R120G homozygous mutant knock-in mice
Publication Title
Probing the changes in gene expression due to α-crystallin mutations in mouse models of hereditary human cataract.
Sample Metadata Fields
Cell line, Subject
View Samples- Homo sapiens
- 8 Downloadable Samples
- IlluminaHiSeq2500
Description
Injury to anterior cruciate ligament (ACL) is common in young individuals and a frequent cause of functional instability and early onset of osteoarthritis. The healing potential of an injured ACL is known to decay over time. The molecular origin of this healing deficiency largely remains elusive but plausibly involves gene transcripts associated with tissue healing. To explore this possibility, we set out to identify transcript expression differences in injured ACL remnants recovered at the time of surgical reconstruction, via microarray (n=24) and RNA-seq (n=8) technologies in transcriptome profiling. We found that time-from-injury was an important determinant of changes in gene expression signatures predominately resulting in repression of several biological processes as identified by gene ontology. The most interesting observation was a time-dependent decline in the gene transcripts as well as the biological processes common to both microarray and RNA-seq analyses. Compared to acute tears, in chronic several important biological processes were namely extracellular matrix organization, angiogenesis, cell adhesion, wound healing, mesenchyme transition, and response to hypoxia. Furthermore, the cross-platform concordance in terms of differentially expressed transcripts or enriched pathways was linearly correlated (r=0.64). Microfluidic digital PCR confirmed the expression of selected differentially expressed transcripts. These intriguing findings suggest an initial attempt of the injured ACL to repair, which drops with time. These findings have implications for efforts to repair the ACL and may be relevant for its reconstruction. These findings also emphasize the utility of differentially expressed transcripts as prognostic biomarkers in patients with ACL injury. Overall design: Examination of transcript expression differences by time-from-injury in anterior cruciate ligament
Publication Title
Advantages of RNA-seq compared to RNA microarrays for transcriptome profiling of anterior cruciate ligament tears.
Sample Metadata Fields
No sample metadata fields
View Samples
SRP058633- Homo sapiens
- 6 Downloadable Samples
Description
This study identified genomwide KCl inducible readthrough transcription. The project also includes a Cap-Seq experiment to identify transcriptional start sites, demonstrating that KCl does not activate downstream transcriptional start sites, but indeed does induce readthrough
Publication Title
Widespread Inducible Transcription Downstream of Human Genes.
Sample Metadata Fields
No sample metadata fields
View Samples- Rattus norvegicus
- 30 Downloadable Samples
Affymetrix Rat Gene 2.1 ST Array (ragene21st)
Description
Sex differences in rat adrenal cortex are manifested as larger adrenal volume of cortex and higher corticosterone secretion by females compared with males. The molecular bases of these sex related differences are poorly understood.
Publication Title
Transcriptome Profile of Rat Adrenal Evoked by Gonadectomy and Testosterone or Estradiol Replacement.
Sample Metadata Fields
Sex, Age, Specimen part
View Samples- Homo sapiens
- 39 Downloadable Samples
- Affymetrix Human Genome U95A Array (hgu95a)
Description
Gain-of-function mutations in exon 3 of beta-catenin (CTNNB1) are specific for Wilms' tumors that have lost WT1, but 50% of WT1-mutant cases lack such "hot spot" mutations. To ask whether stabilization of beta-catenin might be essential after WT1 loss, and to identify downstream target genes, we compared expression profiles in WT1-mutant versus WT1 wild-type Wilms' tumors. Supervised and nonsupervised hierarchical clustering of the expression data separated these two classes of Wilms' tumor. The WT1-mutant tumors overexpressed genes encoding myogenic and other transcription factors (MOX2, LBX1, SIM2), signaling molecules (TGFB2, FST, BMP2A), extracellular Wnt inhibitors (WIF1, SFRP4), and known beta-catenin/TCF targets (FST, CSPG2, CMYC). Beta-Catenin/TCF target genes were overexpressed in the WT1-mutant tumors even in the absence of CTNNB1 exon 3 mutations, and complete sequencing revealed gain-of-function mutations elsewhere in the CTNNB1 gene in some of these tumors, increasing the overall mutation frequency to 75%. Lastly, we identified and validated a novel direct beta-catenin target gene, GAD1, among the WT1-mutant signature genes. These data highlight two molecular classes of Wilms' tumor, and indicate strong selection for stabilization of beta-catenin in the WT1-mutant class. Beta-Catenin stabilization can initiate tumorigenesis in other systems, and this mechanism is likely critical in tumor formation after loss of WT1.
Publication Title
CTNNB1 mutations and overexpression of Wnt/beta-catenin target genes in WT1-mutant Wilms' tumors.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 24 Downloadable Samples
- Illumina HiSeq 2500
Description
Transcriptional dysregulation in a primary cortical neuron model of Huntington''s disease Overall design: RNA-seq of primary cortical neurons transduced with control vector, wildtype Htt or Mutant Htt.
Publication Title
The role of Twist1 in mutant huntingtin-induced transcriptional alterations and neurotoxicity.
Sample Metadata Fields
Cell line, Subject
View Samples- Homo sapiens
- 28 Downloadable Samples
Affymetrix Human Transcriptome Array 2.0 (hta20), Agilent-014850 Whole Human Genome Microarray 4x44K G4112F (Feature Number version), Affymetrix Human Gene 1.0 ST Array (hugene10st)
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
Multi-platform assessment of transcriptional profiling technologies utilizing a precise probe mapping methodology.
Sample Metadata Fields
Specimen part, Disease
View Samples- Homo sapiens
- 19 Downloadable Samples
- Agilent-014850 Whole Human Genome Microarray 4x44K G4112F (Feature Number version), Affymetrix Human Gene 1.0 ST Array (hugene10st)
Description
We present a more extensive and yet precise assessment to elucidate differences and similarities in performance at numerous aspects including signal range, sensitivity to fold-change, and fidelity with TaqMan qRT-PCR. There were three levels of data examined: entire data sets, data derived from gene name annotation oriented subset of 15442 RefSeq genes, and data derived from transcript pattern defined subset of 7034 RefSeq genes. Our results showed a fair degree of overall correlation between all 6 platforms evaluated; but, to varying degrees, two RNA-seq protocols outperformed three of the microarray platforms in most categories. Notably, a fourth microarray platform, Agilent, was comparable, or marginally superior, to the RNA-seq protocols within these same assessments. Furthermore, 3 platforms (Agilent and two RNA-seq methods) demonstrated over 80% concordance with the gold standard TaqMan assay in terms of fold-change accuracy. Our study suggests that the use of transcript patterns can enhance a number of the observed cross-platform correlations, indicating a potential usefulness for similar evaluations.
Publication Title
Multi-platform assessment of transcriptional profiling technologies utilizing a precise probe mapping methodology.
Sample Metadata Fields
Disease
View Samples- Homo sapiens
- 9 Downloadable Samples
- Agilent-014850 Whole Human Genome Microarray 4x44K G4112F (Feature Number version), Affymetrix Human Transcriptome Array 2.0 (hta20)
Description
We present a more extensive and yet precise assessment to elucidate differences and similarities in performance at numerous aspects including signal range, sensitivity to fold-change, and fidelity with TaqMan qRT-PCR. There were three levels of data examined: entire data sets, data derived from gene name annotation oriented subset of 15442 RefSeq genes, and data derived from transcript pattern defined subset of 7034 RefSeq genes. Our results showed a fair degree of overall correlation between all 6 platforms evaluated; but, to varying degrees, two RNA-seq protocols outperformed three of the microarray platforms in most categories. Notably, a fourth microarray platform, Agilent, was comparable, or marginally superior, to the RNA-seq protocols within these same assessments. Furthermore, 3 platforms (Agilent and two RNA-seq methods) demonstrated over 80% concordance with the gold standard TaqMan assay in terms of fold-change accuracy. Our study suggests that the use of transcript patterns can enhance a number of the observed cross-platform correlations, indicating a potential usefulness for similar evaluations.
Publication Title
Multi-platform assessment of transcriptional profiling technologies utilizing a precise probe mapping methodology.
Sample Metadata Fields
Disease
View Samples