Smurf1 regulation of DAB2IP controls cell proliferation and migration.

Smurf1 regulation of DAB2IP controls cell proliferation and migration.
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Smurf1 对 DAB2IP 的调节控制细胞增殖和迁移

DOI:
10.18632/oncotarget.8424
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发表时间:
2016-05-03
期刊:
影响因子:
--
通讯作者:
North BJ
North BJ
中科院分区:
其他
文献类型:
--
作者:
Li X;Dai X;Wan L;Inuzuka H;Sun L;North BJ

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肿瘤细胞的增殖、存活和迁移受卵巢癌2/失能同源物2(DOC - 2/DAB2)相互作用蛋白(DAB2IP)缺失的调控,DAB2IP是一种肿瘤抑制因子,可作为H - Ras和TRAF2的支架蛋白。重要的是,致癌的组蛋白甲基转移酶EZH2在多种肿瘤中通过表观遗传学方式下调DAB2IP。最近,我们证明了DAB2IP受Akt依赖性磷酸化和SCF⁽Fbw7⁾介导的降解的负调控。在此,我们进一步确定癌蛋白Smurf1(一种E3 - 泛素连接酶)是DAB2IP的一种新型负调控因子。Smurf1介导的细胞增殖和迁移在很大程度上依赖于DAB2IP的存在,这表明DAB2IP是Smurf1致癌功能的一个关键效应分子。此外,我们发现与DAB2IP类似,Smurf1也是Akt1和Akt2激酶磷酸化的靶点,这会增加Smurf1的丰度,导致DAB2IP减少。鉴于DAB2IP在肿瘤发生和转移中的作用,我们的数据确定Smurf1是一种上游致癌因子,它负调控DAB2IP以控制异常的细胞生长和迁移。
Tumor cell proliferation, survival and migration are regulated by the deletion of ovarian carcinoma 2/disabled homolog 2 (DOC-2/DAB2) interacting protein (DAB2IP), a tumor suppressor that serves as a scaffold protein for H-Ras and TRAF2. Importantly, the oncogenic histone methyl-transferase EZH2 epigenetically down-regulates DAB2IP in a variety of tumors. Recently, we demonstrated that DAB2IP is negatively regulated by Akt-dependent phosphorylation and SCFFbw7-mediated degradation. Here, we further identify the oncoprotein Smurf1, an E3-ubiquitin ligase, as a novel negative regulator of DAB2IP. Smurf1-mediated cellular proliferation and migration are largely dependent on the presence of DAB2IP, suggesting that DAB2IP is a key effector molecule of Smurf1 oncogenic function. Additionally, we identify that similar to DAB2IP, Smurf1 is also a target of phosphorylation by both Akt1 and Akt2 kinases, which enhances Smurf1 abundance, leading to a reduction in DAB2IP. Given the role of DAB2IP in tumorigenesis and metastasis, our data identify Smurf1 as an upstream oncogenic factor that negatively regulates DAB2IP to govern aberrant cell growth and migration.
DOI: 10.18632/oncotarget.1939
发表时间: 2014-05-30
期刊: Oncotarget
影响因子: --
作者:
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