Gene expression data from primary mouse neocortical cultures
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE218028 | GEO | 2022/11/23
REPOSITORIES: GEO
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Project description:Affymetrix Mouse Genome 430 2.0 GeneChip microarrays were used to analyze murine neocortical and cerbellar astrocytes generated from postnatal (PN) day 1 wild-type (ICR) pups. Experiment Overall Design: Three samples each of murine neocortical and cerebellar astrocytes were analyzed.
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Project description:Precise spatiotemporal control of mRNA translation machinery is essential to proper development of highly complex systems like the neocortex. Here, we show that an RNA-binding protein, Hu antigen R (HuR), regulates both neocorticogenesis and specificity of neocortical translation machinery in a developmental stagedependent manner in mice. Neocortical absence of HuR alters the phosphorylation states of the initiation and elongation factors of the core translation machinery. In addition, HuR regulates the temporally specific positioning of functionally related mRNAs into the active translation sites, the polysomes. HuR also determines the specificity of neocortical polysomes by defining their combinatorial composition of ribosomal proteins and initiation and elongation factors. For some of the HuR-dependent proteins, the association with polysomes depends on the eIF2 alpha kinase 4 (eIF2ak4), which associated with HuR in prenatal developing neocortices. Finally, we found that deletion of HuR prior to embryonic day 10 (E10) disrupts both neocortical lamination and formation of the main neocortical commissure, the corpus callosum. Our study identifies a crucial role for HuR in neocortical development as a translational gatekeeper for functionally related mRNA subgroups and polysomal protein specificity. Cortex was dissected from mouse pups at embryonic day 13 (E13) or the day of birth (P0).
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| PRJNA549520 | ENA