Epigenetic reprogramming in plant and animal development.

Epigenetic reprogramming in plant and animal development.
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DOI:
10.1126/science.1190614
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发表时间:
2010-10-29
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Reik W
Reik W
中科院分区:
其他
文献类型:
--
作者:
Feng S;Jacobsen SE;Reik W

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基因组的表观遗传修饰在多细胞生物体的体细胞中通常是稳定的。然而,在生殖细胞和早期胚胎中,表观遗传重编程发生在全基因组范围内,包括DNA的去甲基化和组蛋白及其修饰的重塑。DNA甲基化的全基因组擦除机制正在解开,其中涉及对5-甲基胞嘧啶(5 mC)的修饰和DNA修复。表观遗传重编程在印迹、全能性和多能性的自然和实验获得、转座子的控制和跨代表观遗传中具有重要作用。小RNA和组蛋白标记的遗传也可能有助于表观遗传和重编程。重编程发生在开花植物和哺乳动物中,它们的相似性和差异性说明了发育和生殖策略。
Epigenetic modifications of the genome are generally stable in somatic cells of multicellular organisms. In germ cells and early embryos, however, epigenetic reprogramming occurs on a genome-wide scale, which includes demethylation of DNA and remodeling of histones and their modifications. Mechanisms of genome-wide erasure of DNA methylation are being unraveled, which involve modifications to 5-methylcytosine (5mC) and DNA repair. Epigenetic reprogramming has important roles in imprinting, the natural as well as experimental acquisition of totipotency and pluripotency, control of transposons, and epigenetic inheritance across generations. Small RNAs and inheritance of histone marks may also contribute to epigenetic inheritance and reprogramming. Reprogramming occurs in flowering plants and in mammals and the similarities and differences illuminate developmental and reproductive strategies.
DOI: 10.1038/nature06714
发表时间: 2008-04-17
期刊: NATURE
影响因子: 64.8
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