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accession-icon GSE10796
Identification of genes that restrict astrocyte differentiation of midgestational neural precursor cells
  • organism-icon Mus musculus
  • sample-icon 4 Downloadable Samples
  • Technology Badge Icon Affymetrix Mouse Genome 430 2.0 Array (mouse4302)

Description

During development of the mammalian central nervous system (CNS), neurons and glial cells (astrocytes and oligodendrocytes) are generated from common neural precursor cells (NPCs). However, neurogenesis precedes gliogenesis, which normally commences at later stages of fetal telencephalic development. Astrocyte differentiation of mouse NPCs at embryonic day (E) 14.5 (relatively late gestation) is induced by activation of the transcription factor STAT3, whereas at E11.5 (mid-gestation) NPCs do not differentiate into astrocytes even when stimulated by STAT3-activating cytokines such as leukemia inhibitory factor (LIF). This can be explained in part by the fact that astrocyte-specific gene promoters are highly methylated in NPCs at E11.5, but other mechanisms are also likely to play a role. We therefore sought to identify genes involved in the inhibition of astrocyte differentiation of NPCs at midgestation. We first examined gene expression profiles in E11.5 and E14.5 NPCs, using Affymetrix GeneChip analysis, applying the Percellome method to normalize gene expression level. We then conducted in situ hybridization analysis for selected genes found to be highly expressed in NPCs at midgestation. Among these genes, we found that N-myc and high mobility group AT-hook 2 (Hmga2) were highly expressed in the E11.5 but not the E14.5 ventricular zone of mouse brain, where NPCs reside. Transduction of N-myc and Hmga2 by retroviruses into E14.5 NPCs, which normally differentiate into astrocytes in response to LIF, resulted in suppression of astrocyte differentiation. However, sustained expression of N-myc and Hmga2 in E11.5 NPCs failed to maintain the hypermethylated status of an astrocyte-specific gene promoter. Taken together, our data suggest that astrocyte differentiation of NPCs is regulated not only by DNA methylation but also by genes whose expression is controlled spatio-temporally during brain development.

Publication Title

Identification of genes that restrict astrocyte differentiation of midgestational neural precursor cells.

Alternate Accession IDs

E-GEOD-10796

Sample Metadata Fields

No sample metadata fields

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accession-icon GSE17384
Gene expression data from the LEC rat model with naturally occuring and oxidative stress induced liver tumorigenesis
  • organism-icon Rattus norvegicus
  • sample-icon 12 Downloadable Samples
  • Technology Badge Icon Affymetrix Rat Genome 230 2.0 Array (rat2302)

Description

To elucidate the fundamental molecular mechanisms responsible for multistep hepatotumorigenesis, this study investigated genes that were upregulated in a stepwise manner from the nave liver condition through to chronic oxidative stress-induced hepatitis and liver tumor by time-series microarray analysis. The time-dependent gene expression profile should reflect the multistep process of hepatotumorigenesis, and might identify genes that function specifically in hepatotumorigenesis.

Publication Title

IQGAP1 and vimentin are key regulator genes in naturally occurring hepatotumorigenesis induced by oxidative stress.

Alternate Accession IDs

E-GEOD-17384

Sample Metadata Fields

Sex, Age, Specimen part, Disease

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accession-icon GSE34229
Expression data of liver samples of dex or vehicle treated wildtype and HDAC6- knockout C57Bl/6 mice respectively
  • organism-icon Mus musculus
  • sample-icon 12 Downloadable Samples
  • Technology Badge Icon Affymetrix Mouse Gene 1.0 ST Array (mogene10st)

Description

In the present study, we investigated the importance of histone deacetylase 6 (HDAC6) for glucocorticoid receptor (GR) mediated effects on glucose metabolism, and its potential as a therapeutic target for the prevention of glucocorticoid (GC)-induced diabetes. Dexamethasone (dex)-induced hepatic glucose output and GR translocation were analysed in wildtype (wt) and HDAC6-deficient (HDAC6ko) mice. The effect of the specific HDAC6-inhibitor tubacin was analysed in-vitro. Wt and HDAC6ko mice were subjected to 3 weeks dex treatment before analysis of glucose and insulin tolerance. HDAC6ko mice showed impaired dex-induced hepatic GR translocation. Accordingly, dex induced expression of a large number of hepatic genes was significantly attenuated in mice lacking HDAC6 and by tubacin in-vitro. Glucose output of primary hepatocytes from HDAC6ko mice was diminished. A significant improvement of dex-induced whole-body glucose intolerance as well as insulin resistance in HDAC6ko mice compared to wt littermates was observed. The present study demonstrates that HDAC6 is an essential regulator of hepatic GC stimulated gluconeogenesis and impairment of whole body glucose metabolism through modification of GR nuclear translocation. Selective pharmacological inhibition of HDAC6 may provide a future therapeutic option against the pro-diabetogenic actions of GCs.

Publication Title

Histone deacetylase 6 (HDAC6) is an essential modifier of glucocorticoid-induced hepatic gluconeogenesis.

Alternate Accession IDs

E-GEOD-34229

Sample Metadata Fields

Sex, Specimen part, Treatment

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accession-icon SRP012265
Small-RNAs in L4 and young adult stages
  • organism-icon Caenorhabditis elegans
  • sample-icon 2 Downloadable Samples
  • Technology Badge IconIllumina Genome Analyzer

Description

Small endogenous C. elegans RNAs from L4 and young adult worms were prepared for sequencing using a protocol derived from Batista et al., (2008) and Lau et al. (2001). The small-RNA libraries were constructed using a method that does not require a 5' monophosphate (called 5' monophosphate-independent method, Ambros et al., 2003) to profile secondary siRNAs that have 5' triphosphorylated G. All preprocessed small-RNA reads were mapped to genome (ce6), allowing no mismatches. After excluding miRNAs, 21U RNAs, rRNAs, and other structural ncRNAs, the remaining reads were classified as 22G RNAs, 26G RNAs, and other siRNAs, based on their length and 5' terminal nucleotide. Overall design: Small-RNA libraries were sequenced in L4 and young adult stages in C.elegans.

Publication Title

Long noncoding RNAs in C. elegans.

Alternate Accession IDs

GSE36394

Sample Metadata Fields

Cell line, Subject

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accession-icon GSE8016
Comparative genomic hybridization between chicken and Japanese quail
  • organism-icon Gallus gallus, Coturnix japonica
  • sample-icon 3 Downloadable Samples
  • Technology Badge Icon Affymetrix Chicken Genome Array (chicken)

Description

Since Japanese quail and chicken belong to the same order Galliforms, DNA sequence of both species are highly conserved and proved to be applicable for various analyses each other. Quail are commonly used to address physiological questions for reasons of economy.

Publication Title

Thyrotrophin in the pars tuberalis triggers photoperiodic response.

Alternate Accession IDs

E-GEOD-8016

Sample Metadata Fields

No sample metadata fields

View Samples
accession-icon SRP094555
Transcriptome-wide landscape of subcellular mRNA redistribution in cell stress
  • organism-icon Mus musculus
  • sample-icon 24 Downloadable Samples
  • Technology Badge IconIllumina 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.

Alternate Accession IDs

GSE90869

Sample Metadata Fields

Cell line, Treatment, Subject

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accession-icon GSE86643
Comparison of infloresence transcriptome of bp er vs. bp er fil
  • organism-icon Arabidopsis thaliana
  • sample-icon 6 Downloadable Samples
  • Technology Badge Icon Affymetrix Arabidopsis ATH1 Genome Array (ath1121501)

Description

BP and ER encode proteins that act synergistically to regulate Arabidopsis inflorescence architecture. To search for genes/proteins that influence the BP/ER signaling pathways, we conducted mutagenesis of the bp er double mutant and found that a mutation in FILAMENTOUS FLOWER (FIL) suppresses many of the morphological/developmental defects in bp er. Given that FIL encodes a Zn-finger containing transcription factor, microarray analysis was conducted on bp er vs. the bp er fil line to identify genes that are misregulated and which might implicate specific genes/proteins/pathways that are involved in regulating inflorescence development.

Publication Title

A novel Filamentous Flower mutant suppresses brevipedicellus developmental defects and modulates glucosinolate and auxin levels.

Alternate Accession IDs

E-GEOD-86643

Sample Metadata Fields

No sample metadata fields

View Samples
accession-icon GSE37484
The effect of sucrose and sulfamethoxazole on the Arabidopsis transcriptome
  • organism-icon Arabidopsis thaliana
  • sample-icon 12 Downloadable Samples
  • Technology Badge Icon Affymetrix Arabidopsis ATH1 Genome Array (ath1121501)

Description

A chemical screen was performed in search of compounds that modify plant responses to sucrose. This screen uncovered that sulfamethoxazole (SMX), a folate biosynthesis inhibitor, acted synergistically with sucrose to inhibit hypocotyl elongation, suggesting interaction between these two pathways. Transcriptome analysis was performed to identify changes in transcript abundance that may underpin crosstalk between sucrose and SMX. Three-day-old dark-grown seedlings were treated to sucrose and SMX at concentrations that induced no change in hypocotyl elongation when administered independently, yet restricted elongation when both were present in the growth media (10mM and 0.2M, respectively). This analysis uncovered multiple core auxin signalling components that exhibit altered transcript abundance in response to co-treatment with sucrose and SMX, suggesting that auxin signalling mediates crosstalk between these two pathways. This study highlights an input through which metabolic status can shape plant growth and development through hormone signalling.

Publication Title

Interplay between sucrose and folate modulates auxin signaling in Arabidopsis.

Alternate Accession IDs

E-GEOD-37484

Sample Metadata Fields

Specimen part

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accession-icon SRP037992
SCML2 Establishes the Male Germline Epigenome
  • organism-icon Mus musculus
  • sample-icon 4 Downloadable Samples
  • Technology Badge Icon

Description

Gametogenesis is dependent on the expression of germline-specific genes. However, it remains unknown how the germline epigenome is distinctly established from that of somatic lineages. Here we show that genes commonly expressed in somatic lineages and spermatogenesis-progenitor cells undergo repression in a genome-wide manner in late stages of the male germline and identify underlying mechanisms. SCML2, a germline-specific subunit of a Polycomb repressive complex 1 (PRC1), establishes the unique epigenome of the male germline through two distinct antithetical mechanisms. SCML2 works with PRC1 and promotes RNF2-dependent ubiquitination of H2A, thereby marking somatic/progenitor genes on autosomes for repression. Paradoxically, SCML2 also prevents RNF2-dependent ubiquitination of H2A on sex chromosomes during meiosis, thereby enabling unique epigenetic programming of sex chromosomes for male reproduction. Our results reveal divergent mechanisms involving a shared regulator by which the male germline epigenome is distinguished from that of the soma and progenitor cells. Overall design: RNA-seq and ChIP-seq analyses using wild-type and Scml2-KO spermatogenic cells

Publication Title

Poised chromatin and bivalent domains facilitate the mitosis-to-meiosis transition in the male germline.

Alternate Accession IDs

GSE55060

Sample Metadata Fields

No sample metadata fields

View Samples
accession-icon SRP069292
RNA-sequencing reveals transcriptional up-regulation of Trem2 in response to bexarotene treatment
  • organism-icon Mus musculus
  • sample-icon 16 Downloadable Samples
  • Technology Badge IconIllumina HiSeq 2000

Description

High throughput massively parallel sequencing on mRNA libraries generated from cortices of bexarotene or vehicle treated APP/PS1 Overall design: Read counts analyzed for differential gene expression using edgeR

Publication Title

RNA-sequencing reveals transcriptional up-regulation of Trem2 in response to bexarotene treatment.

Alternate Accession IDs

GSE77569

Sample Metadata Fields

Specimen part, Cell line, Subject

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refine.bio is a repository of uniformly processed and normalized, ready-to-use transcriptome data from publicly available sources. refine.bio is a project of the Childhood Cancer Data Lab (CCDL)

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Cite refine.bio

Casey S. Greene, Dongbo Hu, Richard W. W. Jones, Stephanie Liu, David S. Mejia, Rob Patro, Stephen R. Piccolo, Ariel Rodriguez Romero, Hirak Sarkar, Candace L. Savonen, Jaclyn N. Taroni, William E. Vauclain, Deepashree Venkatesh Prasad, Kurt G. Wheeler. refine.bio: a resource of uniformly processed publicly available gene expression datasets.
URL: https://www.refine.bio

Note that the contributor list is in alphabetical order as we prepare a manuscript for submission.

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