ALKBH1 is a histone H2A dioxygenase involved in neural differentiation.

ALKBH1 is a histone H2A dioxygenase involved in neural differentiation.
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ALKBH1是参与神经分化的组蛋白H2A双加氧酶。

DOI:
10.1002/stem.1228
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发表时间:
2012-12
期刊:
影响因子:
5.2
通讯作者:
Larsen, Elisabeth
Larsen, Elisabeth
中科院分区:
医学2区
文献类型:
--
作者:
Ougland, Rune;Lando, David;Jonson, Ida;Dahl, John A.;Moen, Marivi Nabong;Nordstrand, Line M.;Rognes, Torbjorn;Lee, Jeannie T.;Klungland, Arne;Kouzarides, Tony;Larsen, Elisabeth

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AlkB同源物1 (ALKBH1)是哺乳动物AlkB同源物家族的9个成员之一。大多数Alkbh1−/−小鼠在胚胎发育过程中死亡,幸存者的特征是源自外胚层谱系的组织存在缺陷。在这项研究中,我们发现Alkbh1的缺失延长了胚胎干细胞中多能性标记的表达,并延迟了参与早期分化的基因的诱导。与野生型细胞相比,体外分化为神经祖细胞(NPCs)的Alkbh1−/−NPCs的凋亡率增加。全基因组表达分析和染色质免疫沉淀显示,ALKBH1可以直接或间接调节神经发育所需的一个基因子集。此外,我们的体外酶活性测定表明,ALKBH1是一种特异性作用于组蛋白H2A的组蛋白双加氧酶。质谱分析表明,Alkbh1−/−小鼠的组蛋白H2A甲基化不正确。我们的研究结果表明,ALKBH1通过改变组蛋白H2A的甲基化状态参与神经发育。干细胞2012;30:2672 - 2682
AlkB homolog 1 (ALKBH1) is one of nine members of the family of mammalian AlkB homologs. Most Alkbh1−/− mice die during embryonic development, and survivors are characterized by defects in tissues originating from the ectodermal lineage. In this study, we show that deletion of Alkbh1 prolonged the expression of pluripotency markers in embryonic stem cells and delayed the induction of genes involved in early differentiation. In vitro differentiation to neural progenitor cells (NPCs) displayed an increased rate of apoptosis in the Alkbh1−/− NPCs when compared with wild-type cells. Whole-genome expression analysis and chromatin immunoprecipitation revealed that ALKBH1 regulates both directly and indirectly, a subset of genes required for neural development. Furthermore, our in vitro enzyme activity assays demonstrate that ALKBH1 is a histone dioxygenase that acts specifically on histone H2A. Mass spectrometric analysis demonstrated that histone H2A from Alkbh1−/− mice are improperly methylated. Our results suggest that ALKBH1 is involved in neural development by modifying the methylation status of histone H2A. Stem Cells 2012;30:2672–2682
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