p63 regulates Satb1 to control tissue-specific chromatin remodeling during development of the epidermis.

p63 regulates Satb1 to control tissue-specific chromatin remodeling during development of the epidermis.
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DOI:
10.1083/jcb.201101148
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发表时间:
2011-09-19
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Botchkarev VA
Botchkarev VA
中科院分区:
其他
文献类型:
--
作者:
Fessing MY;Mardaryev AN;Gdula MR;Sharov AA;Sharova TY;Rapisarda V;Gordon KB;Smorodchenko AD;Poterlowicz K;Ferone G;Kohwi Y;Missero C;Kohwi-Shigematsu T;Botchkarev VA

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基因组组织者 Satb1 受 p63 调节,通过重塑表皮分化复合体位点的染色质结构和基因表达来促进表皮形态发生。在发育过程中,多能祖细胞建立组织特异性的基因表达程序。在本文中,我们证明 p63 转录因子是表皮形态发生的主要调节因子,部分通过直接调节祖细胞中基因组组织者 Satb1 的表达来执行其功能。 p63 与 Satb1 基因的近端调控区结合,p63 消除会导致表皮中 Satb1 表达水平显着降低。 Satb1−/− 小鼠表现出表皮形态受损。在 Satb1 缺失的表皮中,含有与表皮分化相关基因的表皮分化复合体位点的染色质结构主要在其中心区域发生改变,通过染色质免疫沉淀芯片分析证实了 Satb1 的结合。此外,该结构域内的基因在终末分化时无法正确激活。用 p63 小干扰核糖核酸处理的 p63+/- 皮肤外植体中 Satb1 的表达部分恢复了 p63 缺陷小鼠的表皮表型。这些数据提供了一种新机制,p63 的直接下游靶标 Satb1 通过在表皮祖细胞中建立组织特异性染色质组织和基因表达来促进表皮形态发生。
Genome organizer Satb1 is regulated by p63 and contributes to epidermal morphogenesis by remodeling chromatin structure and gene expression at the epidermal differentiation complex locus. During development, multipotent progenitor cells establish tissue-specific programs of gene expression. In this paper, we show that p63 transcription factor, a master regulator of epidermal morphogenesis, executes its function in part by directly regulating expression of the genome organizer Satb1 in progenitor cells. p63 binds to a proximal regulatory region of the Satb1 gene, and p63 ablation results in marked reduction in the Satb1 expression levels in the epidermis. Satb1−/− mice show impaired epidermal morphology. In Satb1-null epidermis, chromatin architecture of the epidermal differentiation complex locus containing genes associated with epidermal differentiation is altered primarily at its central domain, where Satb1 binding was confirmed by chromatin immunoprecipitation–on-chip analysis. Furthermore, genes within this domain fail to be properly activated upon terminal differentiation. Satb1 expression in p63+/− skin explants treated with p63 small interfering ribonucleic acid partially restored the epidermal phenotype of p63-deficient mice. These data provide a novel mechanism by which Satb1, a direct downstream target of p63, contributes in epidermal morphogenesis via establishing tissue-specific chromatin organization and gene expression in epidermal progenitor cells.
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