Bulk RNA-seq expression data isolated from early L1 stage C. elegans larvae
Ontology highlight
ABSTRACT:
ORGANISM(S): Caenorhabditis elegans
PROVIDER: GSE218349 | GEO | 2024/12/08
REPOSITORIES: GEO
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Project description:During development C. elegans GABAergic dorsal D-class (DD) motor neurons reverse polarity such that the axonal and dendritic compartments are switched. We found that the gene DVE-1 is important for this process. To elucidate potential targets of dve-1 transcriptional regulation we conducted bulk RNA sequencing of total RNA from L4 stage wild type and dve-1 mutant animals
2024-12-08 | GSE218350 | GEO
Project description:Six DD class GABAergic neurons are generated in the embryo to synapse with ventral muscles and receive input from cholinergic neurons in the dorsal nerve cord. After hatching and toward the end of the first larval (L1) stage, DD neurons reverse polarity (i.e., synapse with dorsal muscles, receive ventral cholinergic inputs). Expression profiles were generated from DD neurons in the early L1 stage before the initiation of the remodeling program. We used microarray analysis to detect transcripts with potential roles in DD remodeling.
2015-08-01 | GSE71618 | GEO
Project description:Six DD class GABAergic neurons are generated in the embryo to synapse with ventral muscles and receive input from cholinergic neurons in the dorsal nerve cord. After hatching and toward the end of the first larval (L1) stage, DD neurons reverse polarity (i.e., synapse with dorsal muscles, receive ventral cholinergic inputs). Expression profiles were generated from DD neurons in the early L1 stage before the initiation of the remodeling program. We used microarray analysis to detect transcripts with potential roles in DD remodeling. We used FACS to isolate ttr-39::mCherry labeled DD GABAergic motor neurons from a synchronized population of L1 larvae and amplified and labeled total RNA to generate Affymetrix Genome Array data. The DD data sets were compared to an expression profile obtained from all cells in a matched population of synchronized L1 larvae. See Spencer et al. PLOS One 9, e112102 (2014).
2015-08-01 | E-GEOD-71618 | biostudies-arrayexpress
Project description:Strongyloidiasis is a neglected tropical disease caused by the soil-transmitted nematode by Strongyloides stercoralis, that affects approximately 600 million people worldwide. In immunosuppressed individuals disseminated strongyloidiasis can rapidly lead to fatal outcomes. There is no gold standard for diagnosing strongyloidiasis, and infections are frequently misdiagnosed. A better understanding of the molecular biology of this parasite can be useful for example for the discovery of potential new biomarkers. Interestingly, recent evidence showed the presence of small RNAs in Strongyloididae, but no data was provided for S. stercoralis. In this study, we present the first identification of miRNAs of both L1 and iL3 larval stages of S. stercoralis. For our purpose, the aims were: (i) to analyse the miRNome of L1 and iL3 S. stercoralis and to identify potential miRNAs of this nematode, (ii) to obtain the mRNAs profiles in these two larval stages and (iii) to predict potential miRNA target sites in mRNA sequences. Total RNA was isolated from L1 and iL3 collected from the stool of 5 infected individuals. For the miRNAs analysis, we used miRDeep2 software and a pipeline of bio-informatic tools to construct a catalog of a total of 385 sequences. Among these, 53% were common to S. ratti, 19% to S. papillosus, 1% to Caenorhabditis elegans and 44% were novel. Using a differential analysis between the larval stages, we observed 6 suggestive modulated miRNAs (STR-MIR-34A-3P, STR-MIR-8397-3P, STR-MIR-34B-3P and STR-MIR-34C-3P expressed more in iL3, and STR-MIR-7880H-5P and STR-MIR-7880M-5P expressed more in L1). Along with this analysis, we obtained also the mRNAs profiles in the same samples of larvae. Multiple testing found 81 statistically significant mRNAs of the total 1553 obtained (FDR < 0.05; 32 genes expressed more in L1 than iL3; 49 genes expressed more in L3 than iL1). Finally, we found 33 predicted mRNA targets of the modulated miRNAs, providing relevant data for a further validation to better understand the role of these small molecules in the larval stages and their valuein clinical diagnostics.
| S-EPMC9200769 | biostudies-literature
Project description:Axonal regeneration is enhanced by prior conditioning peripheral nerve lesions. Here we show that Xenopus dorsal root ganglia (DRGs) with attached peripheral nerves (PN-DRGs) can be conditioned in vitro, thereafter showing enhanced axonal growth in response to neurotrophins, similar to preparations conditioned by axotomy in vivo. In contrast to freshly dissected preparations, conditioned PN-DRGs show abundant neurotrophin-induced axonal growth in the presence of actinomycin D, suggesting synthesis of mRNA encoding proteins necessary for axonal elongation occurs during the conditioning period, and this was confirmed by oligonucleotide micro-array analysis.
2008-04-16 | E-MEXP-1297 | biostudies-arrayexpress
Project description:The special AT-rich sequence-binding (SATB) protein DVE-1 is widely recognized for its pivotal involvement in orchestrating the retrograde mitochondrial unfolded protein response (mitoUPR) in C. elegans. In our study of downstream factors contributing to lifespan extension in sensory ciliary mutants, we find that DVE-1 is crucial for this longevity effect independent of its canonical mitoUPR function. Additionally, DVE-1 also influences lifespan under conditions of dietary restriction and germline loss, again distinct from its role in mitoUPR. Mechanistically, while mitochondrial stress typically prompts nuclear accumulation of DVE-1 to initiate the transcriptional mitoUPR program, these long-lived mutants reduce DVE-1 nuclear accumulation, likely by enhancing its cytosolic translocation. This observation suggests a cytosolic role for DVE-1 in lifespan extension. Overall, our study implies that, in contrast to the more narrowly defined role of the mitoUPR-related transcription factor ATFS-1, DVE-1 may possess broader functions than previously recognized in modulating longevity and defending against stress.
2024-09-27 | GSE276887 | GEO
Project description:The main goal of the experiment was to analize the transcriptome of GABAergic neurons in general and compare their expression profiles among different brain regions Keywords: GABAergic neurons; expression profiling; rare cell
2008-08-12 | GSE8984 | GEO
Project description:This SuperSeries is composed of the SubSeries listed below.
2024-12-08 | GSE218351 | GEO
Project description:The identification of axonal mRNAs in model organisms has led to the discovery of many axonally translated proteins required for axon guidance and injury response. The extent to which these axonal mRNAs are conserved in humans is unknown. Here we report on the axonal transcriptome of glutamatergic neurons derived from human embryonic stem cells (hESC-neurons) grown in axon isolating microfluidic chambers. We identified mRNAs enriched in axons, representing a functionally unique local transcriptome as compared to the whole neuron transcriptome. Further, we found that the enriched functional categories within high confidence axonal transcripts resemble those in the axonal transcriptome of rat cortical neurons. Comparing our list of human axonal transcripts to similar datasets generated from embryonic and adult rat dorsal root ganglia and rat cortical neurons we found 60 mRNAs common to all four neuron types. We found that over half of these genes are associated with neurological phenotypes or diseases in model organisms and human. This data provides an important resource for studying local mRNA translation in human axons and has the potential to reveal both conserved and unique axonal mechanisms across species and neuronal types. We analyzed the axonal and whole hESC-neuron transcriptome in triplicate using the Affymetrix Human Gene 2.0 ST Array platform.
2016-07-29 | E-GEOD-84975 | biostudies-arrayexpress
Project description:modENCODE_submission_4804 This submission comes from a modENCODE project of Michael Snyder. For full list of modENCODE projects, see http://www.genome.gov/26524648 Project Goal: We are identifying the DNA binding sites for 300 transcription factors in C. elegans. Each transcription factor gene is tagged with the same GFP fusion protein, permitting validation of the gene's correct spatio-temporal expression pattern in transgenic animals. Chromatin immunoprecipitation on each strain is peformed using an anti-GFP antibody, and any bound DNA is deep-sequenced using Solexa GA2 technology. For data usage terms and conditions, please refer to http://www.genome.gov/27528022 and http://www.genome.gov/Pages/Research/ENCODE/ENCODEDataReleasePolicyFinal2008.pdf EXPERIMENT TYPE: CHIP-seq. BIOLOGICAL SOURCE: Strain: OP398(official name : OP398 genotype : unc-119(ed3) III; wgIs398(dve-1::TY1EGFPFLAG C;unc-119(+)) outcross : 3 mutagen : Bombard tags : GFP::3xFlag description : This strain's transgene was constructed by Mihail Sarov at the Max Planck Institute for Cell Biology and Genetics in Dresden description : using Tony Hyman's recombineering pipeline. The resulting plasmid was used for biolistic transformation of an unc-119(ed3) strain. The DVE-1::EGFP fusion protein is expressed in the correct dve-1 spatio-temporal expression pattern. This strain was used for ChIP-seq experiments to map the in vivo binding sites for the DVE-1 transcription factor. made_by : Unknown ); Developmental Stage: Late Embryo; Genotype: unc-119(ed3) III; wgIs398(dve-1::TY1EGFPFLAG C;unc-119(+)); Sex: Hermaphrodite; EXPERIMENTAL FACTORS: Developmental Stage Late Embryo; Target gene dve-1; Strain OP398(official name : OP398 genotype : unc-119(ed3) III; wgIs398(dve-1::TY1EGFPFLAG C;unc-119(+)) outcross : 3 mutagen : Bombard tags : GFP::3xFlag description : This strain's transgene was constructed by Mihail Sarov at the Max Planck Institute for Cell Biology and Genetics in Dresden description : using Tony Hyman's recombineering pipeline. The resulting plasmid was used for biolistic transformation of an unc-119(ed3) strain. The DVE-1::EGFP fusion protein is expressed in the correct dve-1 spatio-temporal expression pattern. This strain was used for ChIP-seq experiments to map the in vivo binding sites for the DVE-1 transcription factor. made_by : Unknown ); temp (temperature) 20 degree celsius
2013-07-11 | E-GEOD-48749 | biostudies-arrayexpress