Hippo Signaling Suppresses Cell Ploidy and Tumorigenesis through Skp2.

Hippo Signaling Suppresses Cell Ploidy and Tumorigenesis through Skp2.
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Hippo 信号传导通过 Skp2 抑制细胞倍性和肿瘤发生

DOI:
10.1016/j.ccell.2017.04.004
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发表时间:
2017-05-08
期刊:
影响因子:
50.3
通讯作者:
Zhou D
Zhou D
中科院分区:
医学1区
文献类型:
--
作者:
Zhang S;Chen Q;Liu Q;Li Y;Sun X;Hong L;Ji S;Liu C;Geng J;Zhang W;Lu Z;Yin ZY;Zeng Y;Lin KH;Wu Q;Li Q;Nakayama K;Nakayama KI;Deng X;Johnson RL;Zhu L;Gao D;Chen L;Zhou D

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多倍体可导致非整倍体和肿瘤发生。在这里,我们报告说,河马途径效应雅普促进二倍体-多倍体转换和多倍体细胞生长通过Akt-Skp 2轴。雅普通过Akt信号传导强烈诱导乙酰转移酶p300介导的E3连接酶Skp 2的乙酰化。乙酰化Skp 2仅定位于细胞质,这导致细胞周期蛋白依赖性激酶抑制剂p27的过度积累,导致有丝分裂停滞和随后的细胞多倍性。此外,促凋亡因子FoxO 1/3被乙酰化Skp 2过度降解,导致多倍体细胞分裂、基因组不稳定和肿瘤发生。重要的是,Akt或Skp 2的缺失或失活消除了Hippo信号缺陷诱导的肝肿瘤发生,表明它们的上位相互作用。因此,我们得出结论,Hippo-Yap信号通过Skp 2抑制细胞多倍性和肿瘤发生。
Polyploidy can lead to aneuploidy and tumorigenesis. Here, we report that the Hippo pathway effector Yap promotes the diploid-polyploid conversion and polyploid cell growth through the Akt-Skp2 axis. Yap strongly induces the acetyltransferase p300-mediated acetylation of the E3 ligase Skp2 via Akt signaling. Acetylated Skp2 is exclusively localized to the cytosol, which causes hyper-accumulation of the cyclin-dependent kinase inhibitor p27, leading to mitotic arrest and subsequently cell polyploidy. Additionally, the pro-apoptotic factors FoxO1/3 are overly degraded by acetylated Skp2, resulting in polyploid cell division, genomic instability and oncogenesis. Importantly, the depletion or inactivation of Akt or Skp2 abrogated Hippo signal deficiency-induced liver tumorigenesis, indicating their epistatic interaction. Thus, we conclude that Hippo-Yap signaling suppresses cell polyploidy and oncogenesis through Skp2.
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