Induction of apoptosis by directing oncogenic Bcr-Abl into the nucleus.

Induction of apoptosis by directing oncogenic Bcr-Abl into the nucleus.
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通过引导致癌 Bcr-Abl 进入细胞核诱导细胞凋亡

DOI:
10.18632/oncotarget.1339
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发表时间:
2013-12
期刊:
影响因子:
--
通讯作者:
Feng WL
Feng WL
中科院分区:
其他
文献类型:
--
作者:
Huang ZL;Gao M;Li QY;Tao K;Xiao Q;Cao WX;Feng WL

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引起慢性粒细胞白血病的嵌合Bcr-Abl癌蛋白主要定位于细胞质,进入细胞核后失去转化细胞的能力。在这里,我们报告了一种通过改变 Bcr-Abl 的亚细胞定位将 Bcr-Abl 转化为凋亡诱导剂的新策略。我们发现,包含六个核定位信号的rapalog核转运系统(RNTS)将Bcr-Abl引导到细胞核中,并且核捕获的Bcr-Abl通过激活p73并关闭Bcr-Abl介导的细胞质致癌信号来诱导细胞凋亡并抑制CML细胞的增殖。将细胞质耗竭与 Bcr-Abl 的核捕获相结合可协同增强细胞核 Bcr-Abl 对小鼠致癌性的抑制作用。这些结果证明,将细胞质 Bcr-Abl 导向细胞核提供了另一种 CML 疗法。
The chimeric Bcr-Abl oncoprotein, which causes chronic myeloid leukemia, mainly localizes in the cytoplasm, and loses its ability to transform cells after moving into the nucleus. Here we report a new strategy to convert Bcr-Abl to be an apoptotic inducer by altering its subcellular localization. We show that a rapalog nuclear transport system (RNTS) containing six nuclear localization signals directs Bcr-Abl into the nucleus and that nuclear entrapped Bcr-Abl induces apoptosis and inhibits proliferation of CML cells by activating p73 and shutting down cytoplasmic oncogenic signals mediated by Bcr-Abl. Coupling cytoplasmic depletion with nuclear entrapment of Bcr-Abl synergistically enhances the inhibitory effect of nuclear Bcr-Abl on its oncogenicity in mice. These results provide evidence that direction of cytoplasmic Bcr-Abl to the nucleus offers an alternative CML therapy.
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