Global DNA demethylation during mouse erythropoiesis in vivo.
Global DNA demethylation during mouse erythropoiesis in vivo.
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在体内小鼠红细胞生成过程中,全局DNA脱甲基化。
DOI:
10.1126/science.1207306
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发表时间:
2011-11-11
期刊:
影响因子:
--
通讯作者:
Socolovsky M
中科院分区:
文献类型:
--
作者:
Shearstone JR;Pop R;Bock C;Boyle P;Meissner A;Socolovsky M
In the mammalian genome, 5’-CpG-3’ dinucleotides are frequently methylated, correlating with transcriptional silencing. Genome-wide demethylation is thought to occur only twice during development, in primordial germ cells and in the pre-implantation embryo. These demethylation events are followed by de novo methylation, setting up a pattern inherited throughout development and modified only at tissue-specific loci. Here we studied DNA methylation in differentiating mouse erythroblasts in vivo using genomic-scale reduced representation bisulfite sequencing (RRBS). Demethylation at the erythroid-specific β-globin locus was coincident with global DNA demethylation at most genomic elements. Global demethylation was continuous throughout differentiation and required rapid DNA replication. Hence, DNA demethylation can occur globally during somatic cell differentiation, providing an experimental model for its study in development and disease.
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