Chromatin effector Pygo2 mediates Wnt-notch crosstalk to suppress luminal/alveolar potential of mammary stem and basal cells.

Chromatin effector Pygo2 mediates Wnt-notch crosstalk to suppress luminal/alveolar potential of mammary stem and basal cells.
复制标题

DOI:
10.1016/j.stem.2013.04.012
复制
发表时间:
2013-07-03
期刊:
影响因子:
23.9
通讯作者:
Dai, Xing
Dai, Xing
中科院分区:
医学1区
文献类型:
--
作者:
Gu, Bingnan;Watanabe, Kazuhide;Sun, Peng;Fallahi, Magid;Dai, Xing

文献摘要

参考文献

被引文献

相似文献

调控乳腺干细胞(MASCS)谱系分化的表观遗传学机制仍然知之甚少。PYGO-2是一个组蛋白甲基化阅读器,也是一个上下文相关的Wnt/β-catenin共激活因子。在此,我们为PYGO-2的S抑制富含MASC的基底细胞的腔/肺泡分化提供了证据。我们发现,PYGO-2缺陷的MASC/基底细胞表现出与腔细胞的部分分子相似性,例如Notch信号增强和移植后乳腺再生能力降低。抑制Notch信号转导抑制基础水平和PYGO_2缺乏诱导的MASC/基底细胞腔/肺泡分化,而激活Wnt/β-Catenin信号则以依赖PYGO_2的方式抑制腔/肺泡分化和Notch3的表达。我们证明了Notch3是PYGO 2的直接靶点,PYGO 2是β-连环蛋白结合所必需的,并在MASC/基底细胞中维持Notch3基因位点的稳定/抑制的染色质状态。总之,我们的数据支持这样一个模型,在该模型中,Pygo2介导的染色质调节连接了Wnt信号和Notch信号,从而限制了MASC/基底细胞的腔/肺泡分化能力。
Epigenetic mechanisms regulating lineage differentiation of mammary stem cells (MaSCs) remain poorly understood. Pygo2 is a histone methylation reader and a context-dependent Wnt/β-catenin co-activator. Here we provide evidence for Pygo2’s function in suppressing luminal/alveolar differentiation of MaSC-enriched basal cells. We show that Pygo2-deficient MaSC/basal cells exhibit partial molecular resemblance to luminal cells such as elevated Notch signaling and reduced mammary repopulating capability upon transplantation. Inhibition of Notch signaling suppresses basal-level and Pygo2 deficiency-induced luminal/alveolar differentiation of MaSC/basal cells, whereas activation of Wnt/β-catenin signaling suppresses luminal/alveolar differentiation and Notch3 expression in a Pygo2-dependent manner. We show that Notch3 is a direct target of Pygo2, and that Pygo2 is required for β-catenin binding and maintenance of a poised/repressed chromatin state at the Notch3 locus in MaSC/basal cells. Together, our data support a model where Pygo2-mediated chromatin regulation connects Wnt signaling and Notch signaling to restrict the luminal/alveolar differentiation competence of MaSC/basal cells.
DOI: 10.1101/gad.1061803
发表时间: 2003-05-15
影响因子: 10.5
作者:
Dontu, G;Abdallah, WM;Wicha, MS
通讯作者: Wicha, MS
DOI: 10.1038/nprot.2008.68
发表时间: 2008-01-01
期刊: NATURE PROTOCOLS
影响因子: 14.8
作者:
Dahl, John Arne;Collas, Philippe
通讯作者: Collas, Philippe
DOI: 10.1016/j.stem.2008.08.001
发表时间: 2008-10-09
期刊: CELL STEM CELL
影响因子: 23.9
作者:
Bouras, Toula;Pal, Bhupinder;Visvader, Jane E.
通讯作者: Visvader, Jane E.
DOI: 10.4161/cc.11.1.18402
发表时间: 2012-01-01
期刊: CELL CYCLE
影响因子: 4.3
作者:
Gu, Bingnan;Watanabe, Kazuhide;Dai, Xing
通讯作者: Dai, Xing
DOI: 10.1042/bj20090134
发表时间: 2009-09-15
影响因子: 4.1
作者:
Andrews, Phillip G. P.;He, Zhijian;Kao, Kenneth R.
通讯作者: Kao, Kenneth R.