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Genome-wide Identification of Neuronal Activity-regulated Genes in Drosophila [Elav_TrpA1]

ABSTRACT: We identified ARGs in a genome-wide manner, in fly brains as well as in sorted neurons; they included dopaminergic neurons (DA) and a subset of circadian-related neurons (PDF+ neurons).

ORGANISM(S): Drosophila melanogaster

PROVIDER: GSE83973 | GEO | 2016/12/12

SECONDARY ACCESSION(S): PRJNA327583

REPOSITORIES: GEO

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Genome-wide Identification of Neuronal Activity-regulated Genes in Drosophila [Elav_TrpA1_ATAC]

Project description:We identified ARGs in a genome-wide manner, in fly brains as well as in sorted neurons; they included dopaminergic neurons (DA) and a subset of circadian-related neurons (PDF+ neurons).

2016-12-12 | GSE83975 | GEO

Genome-wide Identification of Neuronal Activity-regulated Genes in Drosophila [KCl]

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Genome-wide Identification of Neuronal Activity-regulated Genes in Drosophila [Elav_ChR2]

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Genome-wide Identification of Neuronal Activity-regulated Genes in Drosophila [DA_PDF]

2016-12-12 | GSE83969 | GEO

Identification of genes regulated by Fer2 in PAM neurons using an overexpression approach

Project description:The transcription factor Fer2 plays a neuroprotective role in the dopaminergic neurons of the fly brain, but the underlying molecular mechanisms are not understood. By performing RNA-seq on isolated dopaminergic PAM neurons after Fer2 constitutive overexpression, we identified over one hundred genes differentially regulated in response to PAM-specific Fer2 overexpression.

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A transcriptomic taxonomy of Drosophila circadian neurons around the clock

Project description:Many different functions are regulated by circadian rhythms, including those orchestrated by discrete clock neurons within animal brains. To comprehensively characterize and assign cell identity to the 75 pairs of Drosophila circadian neurons, we optimized a single cell RNA sequencing method and assayed clock neuron gene expression at different times of day. The data identify at least 17 clock neuron categories with striking spatial regulation of gene expression. Transcription factor regulation is prominent and likely contributes to the robust circadian oscillation of many transcripts, including those that encode cell-surface proteins previously shown to be important for cell recognition and synapse formation during development. The many other clock-regulated genes also constitute an important resource for future mechanistic and functional studies between clock neurons and/or for temporal signaling to circuits elsewhere in the fly brain.

2021-01-12 | GSE157504 | GEO

Detailed analysis of the genetic and epigenetic signature of iPS cell-derived mesodiencephalic dopaminergic neurons

Project description:Induced pluripotent stem cells (iPSCs) harbor great promise for in vitro generation of disease-relevant cell types, such as mesodiencephalic dopaminergic (mdDA) neurons involved in Parkinson’s disease. Although iPSC-derived midbrain DA neurons have been generated, detailed genetic and epigenetic characterization of such neurons is still lacking. The goal of this study is to examine the authenticity of iPSC-derived DA neurons obtained by established protocols. We FACS-purified mdDA (Pitx3gfp/+) neurons derived from mouse iPSCs and primary mdDA (Pitx3gfp/+) neurons to analyze and compare their genetic and epigenetic features. Although iPSC-derived DA neurons largely adopt characteristics of their in-vivo counterparts, relevant deviations in global gene expression and DNA methylation were found. Hypermethylated genes, mainly involved in neurodevelopment and basic neuronal functions, consequently showed reduced expression levels. Such abnormalities should be addressed as they might affect unambiguous long-term functionality and hamper the potential of iPSC-derived DA neurons for in-vitro disease modeling or cell-based therapy. RRBS methylation maps were generated for iPSCs cells, dopaminergic neurons derived from iPSCs and primary mesodiencephalic dopaminergic neurons

2014-03-01 | E-GEOD-55475 | biostudies-arrayexpress

Neural connectivity molecules best identify the heterogeneous clock and dopaminergic cell types in the Drosophila adult brain

Project description:Our recent single-cell sequencing of most adult Drosophila circadian neurons indicated notable and unexpected heterogeneity. To address whether other populations are similar, we sequenced a large subset of adult brain dopaminergic neurons. Their gene expression heterogeneity is similar to that of clock neurons, i.e., both populations have two to three cells per neuron group. There was also unexpected cell-specific expression of neuron communication molecule messenger RNAs: G protein–coupled receptor or cell surface molecule (CSM) transcripts alone can define adult brain dopaminergic and circadian neuron cell type. Moreover, the adult expression of the CSM DIP-beta in a small group of clock neurons is important for sleep. We suggest that the common features of circadian and dopaminergic neurons are general, essential for neuronal identity and connectivity of the adult brain, and that these features underlie the complex behavioral repertoire of Drosophila.

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Identification of genes regulated by Fer2 in the fly brain using an overexpression approach

Project description:The transcription factor Fer2 plays a neuroprotective role in the dopaminergic neurons of the fly brain, but the underlying molecular mechanisms are not understood. By performing RNA-seq on fly heads after Fer2 inducible overexpression, we identified hundreds of genes differentially regulated in response to Fer2 overexpression. Combining this dataset with Fer2 ChIP-seq on the fly head, we obtained a list of 26 direct target genes, bound and regulated by Fer2.

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Neuronal deletion of the circadian clock gene Bmal1 induces cell-autonomous dopaminergic neurodegeneration

Project description:Circadian rhythm dysfunction is a hallmark of Parkinson Disease (PD), and diminished expression of the core clock gene Bmal1 has been described in PD patients. BMAL1 is required for core circadian clock function, but also serves non-rhythmic functions. Germline Bmal1 deletion can cause brain oxidative stress and synapse loss in mice, and can exacerbate dopaminergic neurodegeneration in response to MPTP. Here we examined the impact of cell type-specific Bmal1 deletion on dopaminergic neuron viability in vivo. We observed that global, post-natal deletion of Bmal1 caused spontaneous loss of tyrosine hydroxylase-positive (TH+) dopaminergic neurons in the substantia nigra pars compacta (SNpc). This was not due to disruption of behavioral circadian rhythms, and was not induced by astrocyte- or microglia-specific Bmal1 deletion. However, either pan-neuronal or TH neuron-specific Bmal1 deletion caused cell-autonomous loss of TH+ neurons in the SNpc. Finally, global Bmal1 deletion exacerbated TH+ neuron loss following injection of alpha-synclein fibrils. Transcriptomic analysis of neuron-specific Bmal1 KO brain revealed dysregulation of pathways involved in oxidative phosphorylation and Parkinson Disease.

2023-08-18 | GSE241200 | GEO

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