A unique regulatory phase of DNA methylation in the early mammalian embryo.
A unique regulatory phase of DNA methylation in the early mammalian embryo.
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DOI:
10.1038/nature10960
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发表时间:
2012-03-28
期刊:
影响因子:
64.8
通讯作者:
Meissner, Alexander
中科院分区:
文献类型:
--
作者:
Smith, Zachary D.;Chan, Michelle M.;Mikkelsen, Tarjei S.;Gu, Hongcang;Gnirke, Andreas;Regev, Aviv;Meissner, Alexander
DNA methylation is highly dynamic during mammalian embryogenesis. It is broadly accepted that the paternal genome is actively depleted of 5-methyl cytosine at fertilization, followed by passive loss that reaches a minimum at the blastocyst stage. However, this model is based on limited data, and to date no base-resolution maps exist to support and refine it. Here, we generated genome-scale DNA methylation maps in mouse gametes and through post-implantation embryogenesis. We find that the oocyte already exhibits global hypomethylation, most prominently at specific families of long interspersed element-1 and long terminal repeat retro-elements, which are disparate between gametes and resolve to lower methylation values in zygote. Surprisingly, the oocyte contributes a unique set of Differentially Methylated Regions (DMRs), including many CpG Island promoter regions, that are maintained in the early embryo but are lost upon specification and absent from somatic cells. In contrast, sperm-contributed DMRs are largely intergenic and resolve to hypermethylation after the blastocyst stage. Our data provide a complete genome-scale, base-resolution timeline of DNA methylation in the pre-specified embryo, when this epigenetic modification is most dynamic, before returning to the canonical somatic pattern.
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影响因子:
14.9
作者:
Blake JA;Bult CJ;Kadin JA;Richardson JE;Eppig JT;Mouse Genome Database Group
通讯作者:
Mouse Genome Database Group
影响因子:
46.9
作者:
通讯作者:
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DOI:
10.1111/j.2517-6161.1995.tb02031.x
发表时间:
1995-01-01
影响因子:
5.8
作者:
BENJAMINI, Y;HOCHBERG, Y
通讯作者:
HOCHBERG, Y
影响因子:
3.6
作者:
Kigami, D;Minami, N;Imai, H
通讯作者:
Imai, H
影响因子:
7.5
作者:
Edwards, Carol A.;Ferguson-Smith, Anne C.
通讯作者:
Ferguson-Smith, Anne C.