MAP3K4/CBP-regulated H2B acetylation controls epithelial-mesenchymal transition in trophoblast stem cells.

MAP3K4/CBP-regulated H2B acetylation controls epithelial-mesenchymal transition in trophoblast stem cells.
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DOI:
10.1016/j.stem.2011.03.008
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发表时间:
2011-05-06
期刊:
影响因子:
23.9
通讯作者:
Johnson, Gary L.
Johnson, Gary L.
中科院分区:
医学1区
文献类型:
--
作者:
Abell, Amy N.;Jordan, Nicole Vincent;Huang, Weichun;Prat, Aleix;Midland, Alicia A.;Johnson, Nancy L.;Granger, Deborah A.;Mieczkowski, Piotr A.;Perou, Charles M.;Gomez, Shawn M.;Li, Leping;Johnson, Gary L.

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上皮干细胞自我更新,同时保持多能性,但干细胞特性对维持上皮表型的依赖性尚不清楚。我们以前的研究表明,缺乏蛋白激酶MAP 3 K4的滋养层干细胞(TS)保持了干细胞和上皮-间质转化(EMT)的特性。在这里,我们表明,MAP 3 K4控制组蛋白乙酰转移酶CBP的活性,和组蛋白H2 A和H2 B的乙酰化CBP是维持上皮表型所必需的。MAP 3 K4/CBP活性的联合丧失抑制上皮基因的表达,并导致TS细胞经历EMT,同时保持其自我更新和多能性。MAP 3 K4缺陷型TS细胞的表达谱定义了与人乳腺癌细胞的表达谱密切重叠的H2 B乙酰化调节的基因特征。综上所述,我们的数据定义了一个表观遗传开关,该开关维持TS细胞中的上皮表型,并揭示了以前未被识别的可能导致乳腺癌的基因。
Epithelial stem cells self-renew while maintaining multipotency, but the dependence of stem cell properties on maintenance of the epithelial phenotype is unclear. We previously showed that trophoblast stem (TS) cells lacking the protein kinase MAP3K4 maintain properties of both stemness and epithelial-mesenchymal transition (EMT). Here, we show that MAP3K4 controls the activity of the histone acetyltransferase CBP, and that acetylation of histones H2A and H2B by CBP is required to maintain the epithelial phenotype. Combined loss of MAP3K4/CBP activity represses expression of epithelial genes and causes TS cells to undergo EMT while maintaining their self-renewal and multipotency properties. The expression profile of MAP3K4 deficient TS cells defines an H2B acetylation regulated gene signature that closely overlaps with that of human breast cancer cells. Taken together, our data define an epigenetic switch that maintains the epithelial phenotype in TS cells and reveal previously unrecognized genes potentially contributing to breast cancer.
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