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Genetic Programs in Human and Mouse Early Embryos Revealed by Single-Cell RNA-Sequencing

ABSTRACT: Genetic Programs in Human and Mouse Early Embryos Revealed by Single-Cell RNA-Sequencing

PROVIDER: PRJNA189204 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR689233_1.fastq.gz	Fastqsanger.gz
	SRR689233_2.fastq.gz	Fastqsanger.gz
	SRR689234_1.fastq.gz	Fastqsanger.gz
	SRR689234_2.fastq.gz	Fastqsanger.gz
	SRR689235_1.fastq.gz	Fastqsanger.gz

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Genetic Programs in Human and Mouse Early Embryos Revealed by Single-Cell RNA-Sequencing

Project description:Mammalian preimplantation development is a complex process involving dramatic changes in the transcriptional architecture. Through single-cell RNA-sequencing (RNA-seq), we report here a comprehensive analysis of transcriptome dynamics from oocyte to morula in both human and mouse embryos. Based on single nucleotide variants (SNVs) in blastomere mRNAs and paternal-specific SNPs, we identify novel stage-specific monoallelic expression patterns for a significant portion of polymorphic gene transcripts (25-53%). By weighted gene co-expression network analysis (WGCNA), we find that each developmental stage can be concisely delineated by a small number of functional modules of co-expressed genes. This result indicates a sequential order of transcriptional changes in pathways of cell cycle, gene regulation, translation, and metabolism in a step-wise fashion from cleavage to morula. Cross-species comparisons reveal that the majority of human stage-specific modules (7 out of 9) are remarkably preserved, only to diverge in developmental specificity and timing in mice. We further identify conserved key members (or hub genes) of the human and mouse networks. These genes represent novel candidates that are likely key players in driving mammalian preimplantation development. Collectively, we demonstrate that mammalian preimplantation development is orchestrated by evolutionarily conserved genetic programs that diverge in developmental timing. Our results provide a valuable resource to dissect gene regulatory mechanism underlying progressive development of early mammalian embryos. single-cell RNA-seq of human and mouse blastomeres

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Project description:Mammalian pre-implantation development is a complex process involving dramatic changes in the transcriptional architecture. We report here a comprehensive analysis of transcriptome dynamics from oocyte to morula in both human and mouse embryos, using single-cell RNA sequencing. Based on single-nucleotide variants in human blastomere messenger RNAs and paternal-specific single-nucleotide polymorphisms, we identify novel stage-specific monoallelic expression patterns for a significant portion of polymorphic gene transcripts (25?to 53%). By weighted gene co-expression network analysis, we find that each developmental stage can be delineated concisely by a small number of functional modules of co-expressed genes. This result indicates a sequential order of transcriptional changes in pathways of cell cycle, gene regulation, translation and metabolism, acting in a step-wise fashion from cleavage to morula. Cross-species comparisons with mouse pre-implantation embryos reveal that the majority of human stage-specific modules (7?out of?9) are notably preserved, but developmental specificity and timing differ between human and mouse. Furthermore, we identify conserved key members (or hub genes) of the human and mouse networks. These genes represent novel candidates that are likely to be key in driving mammalian pre-implantation development. Together, the results provide a valuable resource to dissect gene regulatory mechanisms underlying progressive development of early mammalian embryos.

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