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Construction of a dynamic gene regulatory network required for cellular reprogramming

ABSTRACT: Construction of a dynamic gene regulatory network required for cellular reprogramming

PROVIDER: PRJNA471847 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR12203063.fastq.gz	Fastqsanger.gz
	SRR12203064.fastq.gz	Fastqsanger.gz
	SRR12203065.fastq.gz	Fastqsanger.gz
	SRR12203066.fastq.gz	Fastqsanger.gz
	SRR12203067.fastq.gz	Fastqsanger.gz

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Construction of a dynamic gene regulatory network required for cellular reprogramming

Project description:The generation of induced Pluripotent Stem Cells (iPSCs) from somatic cells provides an excellent example to study mechanisms of transcription factor-induced global alterations of the genome and the epigenome. Here, we have investigated the early transcriptional events of cellular reprogramming triggered by the co-expression of OSKM (Oct4, Sox2, Klf4 and c-Myc) in Mouse Embryonic Fibroblasts (MEFs) and mouse Hepatocytes (mHeps) and identified a novel gene regulatory network composed of 9 Transcriptional Regulators (TRs), which are directly targeted by OSKM. Functional studies using single and double shRNA knock-downs of any of these TRs caused disruption of the network and dramatic reductions in reprogramming efficiency, demonstrating that this novel gene regulatory network is essential for the induction and establishment of pluripotency. We demonstrate that that the stochastic co-expression of the 9TRs network components occurs in a remarkably small number of cells approximating the percentage of reprogrammed cells as the result of dynamic molecular events. Thus, the early binding patterns of OSKM and the subsequent stochastic co-expression of pivotal TRs in subpopulations of cells steer the reconstruction of a gene regulatory network crucial for the generation of iPSCs. In this study, we show that OSKM trigger the gradual establishment of the stemness phenotype by inducing the stochastic reconstruction of a novel 9TRs gene regulatory network that guides the acquisition to pluripotency.

2019-02-14 | GSE114581 | GEO

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Determination of dynamic changes in chromatin accessibility during cellular reprogramming [ChIP-seq]

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