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ABSTRACT: Comparative proteomic landscapes elucidate human preimplantation development and failure

PROVIDER: PRJNA1191977 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR31547417_1.fastq.gz	Fastqsanger.gz
	SRR31547417_2.fastq.gz	Fastqsanger.gz
	SRR31547418_1.fastq.gz	Fastqsanger.gz
	SRR31547418_2.fastq.gz	Fastqsanger.gz
	SRR31547419_1.fastq.gz	Fastqsanger.gz

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Comparative proteomic landscapes elucidate human preimplantation development and failure

Project description:Understanding mammalian preimplantation development, particularly in humans, at the proteomic level remains limited. Here, we applied our comprehensive solution of ultrasensitive proteomic technology to measure the proteomic profiles of oocytes and early embryos and identified nearly 8,000 proteins in humans and over 6,300 proteins in mice. We observed distinct proteomic dynamics before and around zygotic genome activation (ZGA) between the two species. Integrative analysis with translatomic data revealed extensive divergence between translation activation and protein accumulation. Multi-omic analysis indicated that ZGA transcripts often contribute to protein accumulation in blastocysts. Using mouse embryos, we identified several transcriptional regulators critical for early development, thereby linking ZGA to the first lineage specification. Furthermore, single-embryo proteomics of poor-quality embryos from over 100 patient couples provided insights into preimplantation development failure. Our study may contribute to reshaping the framework of mammalian preimplantation development and opening avenues for addressing human infertility.

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Project description:Lactate is present at a high level in the microenvironment of mammalian preimplantation embryos in vivo and in vitro. However, its role in preimplantation development is unclear. Here, we report that lactate is highly enriched in the nuclei of early embryos when major zygotic genome activation (ZGA) occurs in humans and mice. The inhibition of its production and uptake results in developmental arrest at the 2-cell stage, major ZGA failure, and loss of lactate-derived H3K18lac, and the abnormal phenotypes could be recapitulated by overexpression of H3K18R mutation and rescued by addition of Lac-CoA. By profiling the landscape of H3K18lac in human and mouse preimplantation embryos, we show that H3K18lac is enriched on the promoter regions of most major ZGA genes and corelates with their expressions. Taken together, we demonstrate the important role for lactate in major ZGA via H3K18lac, showing a conserved metabolic mechanism underlies preimplantation development of mammalian embryos.

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5-Formylcytosine Landscapes of Human Preimplantation Embryos at Single-cell Resolution

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Project description:Comparative analysis of bovine, mouse and xenopus oocyte transcript profiles. The results from bovine and xenopus germinal vesicle stage oocytes in this experiment were compared to previously-published microarray data on preimplantation development in the mouse (Carter 2003).

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Project description:The control of cell identity is orchestrated by transcriptional and chromatin regulators in the context of specific chromosome structures. With the recent isolation of human naive embryonic stem cells (ESCs) representative of the ground state of pluripotency, it is possible to deduce this regulatory landscape in one of the earliest stages of human development. Here we generate cohesin ChIA-PET chromatin interaction data in naive and primed human ESCs and use it to reconstruct and compare the 3D regulatory landscapes of these two stages of early human development. The results reveal shared and stage-specific regulatory landscapes of topological domains and their subdomains, which consist of CTCF-CTCF/cohesin loops and enhancer-promoter/cohesin loops. The enhancer-promoter loop data reveal that genes with key roles in pluripotency are nearly always regulated by one or more super-enhancers, and show that these genes tend to occur in insulated neighborhoods. Our results reveal the key features of the 3D regulatory landscape of early human cells that form the foundation for embryonic development. ChIP-seq data from naive and primed human embroynic stem cells.

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