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The gene regulatory cascade linking proneural specification with differentiation in Drosophila sensory neurons

ABSTRACT: A challenge in systems biology is to understand the gene regulatory networks that connect early cellular specification to terminal differentiation of specific cell types. In neurogenesis, neural specification has been well studied, but the link between the proneural transcriptional regulators of specification and the genes that must be activated to construct differentiated neurons is obscure. High resolution temporal profiling of gene expression reveals the events downstream of Atonal (Ato) proneural gene function in Drosophila sensory neurons. Unexpectedly, many differentiation genes are activated soon after specification, even before cell cycle exit and overt neuronal differentiation. Prominent among them are genes required for construction of the ciliary dendrite. Ato activates differentiation both directly and indirectly via several intermediate transcriptional regulators, including Rfx and a new Forkhead family factor. Our analysis of these factors and their regulation provides insight into how proneural factors regulate neuronal subtype differentiation. Investigating the molecular mechanisms of peripheral nervous sytem development in Drosophila melanogaster.

ORGANISM(S): Drosophila melanogaster

PROVIDER: GSE21520 | GEO | 2011/02/18

SECONDARY ACCESSION(S): PRJNA125961

REPOSITORIES: GEO

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The gene regulatory cascade linking proneural specification with differentiation in Drosophila sensory neurons

Project description:A challenge in systems biology is to understand the gene regulatory networks that connect early cellular specification to terminal differentiation of specific cell types. In neurogenesis, neural specification has been well studied, but the link between the proneural transcriptional regulators of specification and the genes that must be activated to construct differentiated neurons is obscure. High resolution temporal profiling of gene expression reveals the events downstream of Atonal (Ato) proneural gene function in Drosophila sensory neurons. Unexpectedly, many differentiation genes are activated soon after specification, even before cell cycle exit and overt neuronal differentiation. Prominent among them are genes required for construction of the ciliary dendrite. Ato activates differentiation both directly and indirectly via several intermediate transcriptional regulators, including Rfx and a new Forkhead family factor. Our analysis of these factors and their regulation provides insight into how proneural factors regulate neuronal subtype differentiation. Investigating the molecular mechanisms of peripheral nervous sytem development in Drosophila melanogaster. Affymetrix Drosophila version 2.0 chips used to measure gene expression from GFP+ and GFP- cells from embryos expressing GFP under the control of the atonal gene enhancer in both wild type and mutant embryos. Data generated for three developmental time-points in quadruplicate.

2011-02-18 | E-GEOD-21520 | biostudies-arrayexpress

Translatome of developing drosophila t4/t5 neurons in wildtype versus atonal loss of function genotypes

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Transcription profiling by array of Drosophila embryonic chordotonal neurons expressing the cato GFP reporter gene construct

Project description:Further to a previous transcription profiling experiment using a GFP reporter gene construct expressing the Drosophila proneural gene atonal (Cachero et al. 2011), a later expressing transcription factor and downstream target of ato, cato (cousin of ato) was explored as the GFP reporter in this experiment. cato-GFP expressing cells were isolated from 10h45min and 11h45min old embryos. GFP+ and GFP- cells were compared on Affymetrix Drosophila version 2.0 chips.

2019-02-19 | E-MTAB-7529 | biostudies-arrayexpress

Chromatine immunoprecipation of atonal binding sites in Drosophila L3 eye imaginal discs

Project description:Atonal is a proneural transcription factor expressed in the Drosophila eye imaginal discs. To characterize the putative targes of Atonal in the eye discs we have used an endogenously GFP-tagged version of atonal to immunoprecipate disc samples with anti-GFP antibodies

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Chromatine immunoprecipation of atonal binding sites in Drosophila L3 Brains

Project description:Atonal is a proneural transcription factor expressed in the Drosophila neuroblast cluster known as the inner proliferation center (IPC). To characterize the putative targes of Atonal in the IPC we have used an endogenously GFP-tagged version of atonal to immunoprecipate brain samples with anti-GFP antibodies

2018-02-21 | GSE110687 | GEO

Drosophila melanogaster

Project description:The gene regulatory cascade linking proneural specification with differentiation in Drosophila sensory neurons

| PRJNA125961 | ENA

Identification of Phox2b-regulated genes by expression profiling of cranial motoneuron precursors on NIA 15k microarray

Project description:Branchiomotor neurons are an important class of cranial motor neurons that innervate the branchial-arch-derived muscles of the face, jaw and neck. They arise in the ventralmost progenitor domain of the rhombencephalon characterized by expression of the homeodomain transcription factors Nkx2.2 and Phox2b. Phox2b in particular plays a key role in the specification of branchiomotor neurons. In its absence, generic neuronal differentiation is defective in the progenitor domain, and no branchiomotor neurons are produced. Conversely, ectopic expression of Phox2b in spinal regions of the neural tube promotes cell cycle exit and neuronal differentiation and at the same time induces genes and an axonal phenotype characteristic for branchiomotor neurons. How Phox2b exerts its pleiotropic functions, both as a proneural gene and a neuronal subtype determinant, has remained unknown. To gain further insight into the genetic programme downstream of Phox2b we searched for novel Phox2b-regulated genes by cDNA microarray (here NIA 15k slides) analysis of facial branchiomotor neuron precursors from heterozygous and homozygous Phox2b mutant embryos. Keywords: Phox2b-regulated genes identification Four biological replicates each in dye swap

2010-05-25 | E-GEOD-9603 | biostudies-arrayexpress

Identification of Phox2b-regulated genes by expression profiling of cranial motoneuron precursors on NeuroDev microarray

Project description:Branchiomotor neurons are an important class of cranial motor neurons that innervate the branchial-arch-derived muscles of the face, jaw and neck. They arise in the ventralmost progenitor domain of the rhombencephalon characterized by expression of the homeodomain transcription factors Nkx2.2 and Phox2b. Phox2b in particular plays a key role in the specification of branchiomotor neurons. In its absence, generic neuronal differentiation is defective in the progenitor domain, and no branchiomotor neurons are produced. Conversely, ectopic expression of Phox2b in spinal regions of the neural tube promotes cell cycle exit and neuronal differentiation and at the same time induces genes and an axonal phenotype characteristic for branchiomotor neurons. How Phox2b exerts its pleiotropic functions, both as a proneural gene and a neuronal subtype determinant, has remained unknown. To gain further insight into the genetic programme downstream of Phox2b we searched for novel Phox2b-regulated genes by cDNA microarray (here NeuroDev slides) analysis of facial branchiomotor neuron precursors from heterozygous and homozygous Phox2b mutant embryos. Keywords: Phox2b-regulated genes identification Four biological replicates each in dye swap

2010-05-25 | E-GEOD-9619 | biostudies-arrayexpress

Drosophila Johnston organ genes

Project description:Hemizygous ato[1]/Df(3R)p[13] null mutants lack Johnston organ (JO) in their 2nd antennal segment. We screened for genes that are expressed in JO by comparing the 2nd antennal segment transcriptomes between ato[1]/Df(3R)p[13] mutants and balanced Df(3R)p[13]/TM3 and ato[1]/TM3 controls. To assess transcriptomes, we isolated the 2nd antennal segments of ~50 flies per strain and extracted their total RNA. Because about half of the JO cells are sensory neurons, we also isolated RNA from the brains of ato[1]/TM3 controls to delineate neuronal JO genes. cRNA was hybridized to Affymetrix Drosophila Genome 2.0 arrays. For each experiment, three biological replicates were run.

2012-08-31 | E-MEXP-3609 | biostudies-arrayexpress

Atonal and Senseless perturbations in Drosophila melanogaster eye-antennal imaginal discs.

Project description:The goal of this study is to identify co-expressed genes downstream of Atonal and Senseless. These gene lists are used as candidate target genes (technically: as foreground sets) in computational predictions of cis-regulatory elements using the cisTargetX method (http://med.kuleuven.be/cme-mg/lng/cisTargetX). Together, the gene expression results and cis-regulatory predictions, yield a gene regulatory network underlying the early events in retinal differentiation. Predicted cis-regulatory interactions have been validated extensively in vivo using enhancer reporter assays and genetic perturbations. Six samples were analyzed for Atonal gain-of-function (GOF) in the eye-antennal imaginal discs of third instar larvae of Drosophila melanogaster, namely three biological repeats for two different Gal4 drivers (Gal4/7 and AtoGal), crossed with UASato. Three samples were analyzed for Atonal loss-of-function (LOF) in the eye-antennal imaginal discs, namely three biological repeats of ato-/- larvae. Three samples were analyzed for Senseless GOF, namely three biological repeats of atoGal4 crossed with UASsens. Finally, eight control samples were analyzed, namely two biological repeats of four different lines (atoGal4, Gal4/7, UASato, and cantonS wild type).

2010-07-29 | E-GEOD-16713 | biostudies-arrayexpress

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