Epigenetic inheritance of cell fates during embryonic development.

Epigenetic inheritance of cell fates during embryonic development.
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DOI:
10.3389/fgene.2014.00019
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发表时间:
2014
影响因子:
3.7
通讯作者:
Dobreva G
Dobreva G
中科院分区:
生物学3区
文献类型:
--
作者:
Cheedipudi S;Genolet O;Dobreva G

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在胚胎发育过程中,单个全能合子产生大量具有相同基因组、差异很大且特化的细胞类型。组织特异性转录因子与表观遗传修饰剂配合,在分化细胞中建立细胞身份,表观遗传调节机制有助于维持不同的染色质状态和细胞类型特异性基因表达模式,这种现象称为表观遗传记忆。这是通过连续几轮细胞分裂稳定维持各种表观遗传标记来实现的。 DNA 甲基化模式的保留是表观遗传记忆的一种成熟机制,但最近人们已经清楚,许多其他表观遗传修饰也可以在 DNA 复制和细胞分裂后得以维持。在这篇综述中,我们概述了有关组蛋白赖氨酸甲基化在稳定表观遗传状态的建立和维持中的作用的当前知识。
During embryonic development a large number of widely differing and specialized cell types with identical genomes are generated from a single totipotent zygote. Tissue specific transcription factors cooperate with epigenetic modifiers to establish cellular identity in differentiated cells and epigenetic regulatory mechanisms contribute to the maintenance of distinct chromatin states and cell-type specific gene expression patterns, a phenomenon referred to as epigenetic memory. This is accomplished via the stable maintenance of various epigenetic marks through successive rounds of cell division. Preservation of DNA methylation patterns is a well-established mechanism of epigenetic memory, but more recently it has become clear that many other epigenetic modifications can also be maintained following DNA replication and cell division. In this review, we present an overview of the current knowledge regarding the role of histone lysine methylation in the establishment and maintenance of stable epigenetic states.
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