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Genome-wide RNA structure changes during human neurogenesis modulate gene regulatory networks

ABSTRACT: Genome-wide RNA structure changes during human neurogenesis modulate gene regulatory networks

PROVIDER: PRJNA989350 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR25079300_1.fastq.gz	Fastqsanger.gz
	SRR25079300_2.fastq.gz	Fastqsanger.gz
	SRR25079301_1.fastq.gz	Fastqsanger.gz
	SRR25079301_2.fastq.gz	Fastqsanger.gz
	SRR25079302_1.fastq.gz	Fastqsanger.gz

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Genome-wide RNA structure changes during human neurogenesis modulate gene regulatory networks

Project description:RNAs structures play central roles in various cellular processes, and can be remodeled upon binding to cellular factors such as RNA binding proteins (RBP). However, how widespread this remodeling is and whether structural changes can serve as additional regulatory steps for other regulators remains under-explored. Here, we assayed RNA structural dynamics, gene expression, translation and decay during different stages of human neuronal differentiation to understand the impact of RNA structures in stem cell regulation. RBP binding resulted in wide-spread RNA structure changes during early neuronal differentiation. Structure changes act as a common mechanism for RBPs to modulate the binding of additional RBPs and miRNAs to coordinate gene expression temporally. In particular, we showed that PUM2 binding on LIN28A resulted in RNA structure changes that enabled miR-30 binding, leading to downregulation of LIN28A. Compensatory mutagenesis experiments that lock specific structural states confirmed the importance of PUM2-induced structure changes in miR-30 regulation. This systematic study broadens our understanding of RNA structural dynamics during human neuronal differentiation and illustrates the wide-spread and complex role of RBPs in regulating RNA structures for gene regulation during human development.

2023-07-01 | GSE236224 | GEO

Genome-wide structure changes during neuronal differentiation drive gene regulatory networks

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Genome-wide structure changes during neuronal differentiation drive gene regulatory networks

Project description:Genome-wide structure changes during neuronal differentiation drive gene regulatory networks

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Study of gene networks in basal progenitors during cortical neurogenesis

Project description:During cortical development neurons are generated sequentially from basal progenitors (BPs) which specifically express the transcription factor Tbr2. We used fluorescent-activaed cell sorting (FACS) to isolate BPs from Tbr2GFP knockin reporter mice (Arnold SJ et al. Genesis, 2009) at early (embryonic day, E13) and late (embryonic day, E16) stages of cortical neurogenesis and determined mRNA expression profiles using mouse mRNA microarray (Illumina MouseWG-6 v2). Comparison of E13 and E16 mRNA expression profiles allowed us to identify regulatory gene networks for maintaining stage specific homeostasis of BPs throughout neurogenesis. FACS isolated BPs at E13 and E16 mouse brain cortex were used for microarray analyses. Six biological replicates (embryonic cortex from three different litters) for E13 and five biological replicates (embryonic cortex from three different litters) for E16 were analysed.

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Gene regulatory networks controlling temporal patterning, neurogenesis, and cell fate specification in the mammalian retina.

Project description:Gene regulatory networks (GRNs), consisting of transcription factors and their target cis-regulatory sequences, control neurogenesis and cell fate specification in the developing central nervous system, but their organization is poorly characterized. In this study, we performed integrated scRNA-seq and scATAC-seq analysis from both mouse and human retina to profile dynamic changes in gene expression, chromatin accessibility and transcription factor footprinting during retinal neurogenesis and gliogenesis. We identified multiple interconnected, evolutionarily-conserved GRNs consisting of cell type-specific transcription factors that both activate expression of genes within their own network and often inhibit expression of genes in other networks. These GRNs control state transitions within primary retinal progenitors that underlie temporal patterning, regulate the transition from primary to neurogenic progenitors, and drive specification of each major retinal cell type. We confirmed the prediction of this analysis that the NFI transcription factors Nfia, Nfib, and Nfix selectively activate expression of genes that promote late-stage temporal identity in primary retinal progenitors. We also used GRNs to identify additional transcription factors that selectively promote (Insm1/2) and inhibit (Tbx3, Tcf7l1/2) rod photoreceptor specification in postnatal retina. This study provides an inventory of cis- and trans-acting factors that control retinal development, identifies transcription factors that control the temporal identity of retinal progenitors and cell fate specification, and will potentially help guide cell-based therapies aimed at replacing retinal neurons lost due to disease.

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Gene regulatory networks controlling temporal patterning, neurogenesis, and cell fate specification in the mammalian retina.

Project description:Gene regulatory networks controlling temporal patterning, neurogenesis, and cell fate specification in the mammalian retina.

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Project description:Alternative splicing (AS) is a critical regulatory layer, yet factors controlling networks of functionally coordinated splicing events during developmental transitions remain poorly understood. Here, we employ a multifaceted screening strategy to define factors that control dynamically regulated splicing events associated with neurogenesis. Among numerous previously unknown regulators, Rbm38 acts widely to negatively impact neural AS through Ptbp1-dependent and -independent mechanisms. Puf60, a ubiquitous splicing factor, is surprisingly found to promote neural splicing patterns. This activity is determined by a vertebrate-conserved, neural-differential exon that remodels Puf60 co-factor interactions. Ablation of this exon rewires distinct AS networks in embryonic stem cells and at multiple stages of neural differentiation. Single-cell transcriptome analyses further reveal critical, multi-stage roles for Rbm38 and Puf60 isoforms in establishing neuronal identity. Our results thus reveal key new regulators of neurogenesis and establish how a single exon in a widely expressed splicing factor orchestrates temporal control over cell differentiation.

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