Dynamic epigenomic landscapes during early lineage specification in mouse embryos
| Autor: | Wen-Hao Zhang, Miguel Fidalgo, Zhenhai Du, Yuanyuan Li, Yunlong Xiang, Weikun Xia, Yu Zhang, Feng Xu, Wei Xie, Zhen-Ao Zhao, Qiangzong Yin, Lei Li, Xu Peng, Jing Ma, Qiujun Wang, Jianlong Wang |
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| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Lineage (genetic) Germ layer Biology Regulatory Sequences Nucleic Acid Epigenesis Genetic Transcriptome 03 medical and health sciences Mice Genetics Animals Cell Lineage Embryo Implantation Promoter Regions Genetic Alleles Epigenomics Endoderm Gastrulation Methylation DNA Methylation Embryo Mammalian Embryonic stem cell Chromatin Mice Inbred C57BL 030104 developmental biology Blastocyst Evolutionary biology DNA methylation Germ Layers |
| Zdroj: | Nature genetics. 50(1) |
| ISSN: | 1546-1718 |
| Popis: | In mammals, all somatic development originates from lineage segregation in early embryos. However, the dynamics of transcriptomes and epigenomes acting in concert with initial cell fate commitment remains poorly characterized. Here we report a comprehensive investigation of transcriptomes and base-resolution methylomes for early lineages in peri- and postimplantation mouse embryos. We found allele-specific and lineage-specific de novo methylation at CG and CH sites that led to differential methylation between embryonic and extraembryonic lineages at promoters of lineage regulators, gene bodies, and DNA-methylation valleys. By using Hi-C experiments to define chromatin architecture across the same developmental period, we demonstrated that both global demethylation and remethylation in early development correlate with chromatin compartments. Dynamic local methylation was evident during gastrulation, which enabled the identification of putative regulatory elements. Finally, we found that de novo methylation patterning does not strictly require implantation. These data reveal dynamic transcriptomes, DNA methylomes, and 3D chromatin landscapes during the earliest stages of mammalian lineage specification. |
| Databáze: | OpenAIRE |
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