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Lysosomal Dynamics Orchestrate Neurogenesis [Polysome-seq]

ABSTRACT: Lysosomes are cellular recycling stations and metabolic signaling hubs. Whether lysosome dynamics regulate mammalian brain development is unknown. We found that radial glia cells possess a large number of endolysosomes and that asymmetric inheritance of lysosomes in daughters of radial glia cells can predict fate and cell cycle length. To determine the translation control by the mTORC1, we performed polysome profiling of mRNAs associated with >3 ribosomes for neural progenitor cells that treated with DMSO or Torin1 for 2 hours.

ORGANISM(S): Mus musculus

PROVIDER: GSE205681 | GEO | 2022/08/31

REPOSITORIES: GEO

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Lysosomal Dynamics Orchestrate Neurogenesis [RIP-Seq]

Project description:Lysosomes are cellular recycling stations and metabolic signaling hubs. Whether lysosome dynamics regulate mammalian brain development is unknown. We found that radial glia cells possess a large number of endolysosomes and that asymmetric inheritance of lysosomes in daughters of radial glia cells can predict fate and cell cycle length. To determine the lysosomal regulation of translation initiation by mTORC1/eIF4E axis, we performed RNA immunoprecipitation sequencing (RIP-seq) with antibody against eIF4E in E13.5 neocortex.

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2008-06-18 | E-GEOD-8034 | biostudies-arrayexpress

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Project description:Since the discovery of radial glia as the source of neurons, their heterogeneity in regard to neurogenesis has been described by clonal and time-lapse analysis in vitro. However, the molecular determinants specifying neurogenic radial glia differently from radial glia that mostly self-renew remain ill-defined. Here, we isolated two radial glial subsets that co-exist at mid-neurogenesis in the developing cerebral cortex and their immediate progeny. While one subset generates neurons directly, the other is largely non-neurogenic but also gives rise to Tbr2-positive basal precursors, thereby contributing indirectly to neurogenesis. Isolation of these distinct radial glia subtypes allowed determining interesting differences in their transcriptome. These transcriptomes were also strikingly different from the transcriptome of radial glia isolated at the end of neurogenesis. This analysis therefore identifies, for the first time, the lineage origin of basal progenitors and the molecular differences of this lineage in comparison to directly neurogenic and gliogenic radial glia.

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Lysosomal Dynamics Orchestrate Neurogenesis

Project description:This SuperSeries is composed of the SubSeries listed below.

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Project description:Using an siRNA screen we identify a role for GPR65 in the defense against intracellular pathogens. Epithelial cells and macrophages lacking GPR65 exhibited impaired clearance of intracellular bacteria as well as an accumulation of aberrant phagosomes and lysosomes. Transcriptional profiling revealed changes in genes associated with lysosomal function. Bone marrow-derived macrophages from WT or Gpr65-/- mice were harvested for RNA analysis.

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