Unknown,Transcriptomics,Genomics,Proteomics

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RNA-seq of human nociceptor-like sensory neurons with varying Neurogenin 1 induction lengths

ABSTRACT: Induced pluripotent stem cells were differentiated into neural crest progenitors and infected with a lentiviral construct that contains a doxycyclin-inducible Neurogenin 1(Ngn1) cassette. The samples represent RNA-sequencing from a condition where Ngn1 was activated for 10 days post infection or 23 days post infection.

INSTRUMENT(S): Illumina MiSeq

ORGANISM(S): Homo sapiens

SUBMITTER: Muad Abd El Hay

PROVIDER: E-MTAB-12098 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:Transcriptional targets of neurogenin (Ngnr1) were identified by over-expression of an inducible form of neurogenin in Xenopus ectodermal explants. The effects of co-expressing the nucleoprotein geminin on Ngnr1-dependent target gene transactivation were defined. Regulating the transition from lineage-restricted progenitors to terminally differentiated cells is a central aspect of nervous system development. Here, we investigated the role of the nucleoprotein geminin in regulating neurogenesis at a mechanistic level during both Xenopus primary neurogenesis and mammalian neuronal differentiation in vitro. The latter work utilized both neural cells derived from embryonic stem and embryonal carcinoma cells in vitro and neural stem cells from mouse forebrain. In all of these contexts, geminin antagonized the ability of neural bHLH transcription factors to activate transcriptional programs promoting neurogenesis. Furthermore, geminin promoted a bivalent chromatin state, characterized by the presence of both activating and repressive histone modifications, at genes encoding transcription factors that promote neurogenesis. This epigenetic state restrains the expression of genes that regulate commitment of undifferentiated stem and neuronal precursor cells to neuronal lineages. Geminin is highly expressed in undifferentiated neuronal precursor cells but is downregulated prior to differentiation. Therefore, these data support a model whereby geminin promotes the neuronal precursor cell state by modulating both the epigenetic status and expression of genes encoding neurogenesis-promoting factors. Additional developmental signals acting in these cells can then control their transition toward terminal neuronal or glial differentiation during mammalian neurogenesis. A dexamethasone-inducible (GR ligand binding domain fused) form of Xenopus neurogenin-related 1, NgnrGR, was over-expressed in Xenopus embryonic ectodermal explants, in the presence or absence of over-expressed geminin. Induction of Ngnr1 activity was used to define direct targets as previously described (EMBO J. 26(24): 5093-5108). The ability of geminin to suppress Ngnr1-dependent transactivation of its target gene programs was determined.

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RNA-seq of human nociceptor-like sensory neurons with varying Neurogenin 1 induction lengths

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