Inhibition of SNW1 association with spliceosomal proteins promotes apoptosis in breast cancer cells.

Inhibition of SNW1 association with spliceosomal proteins promotes apoptosis in breast cancer cells.
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DOI:
10.1002/cam4.366
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发表时间:
2015-02
期刊:
影响因子:
4
通讯作者:
Senga, Takeshi
Senga, Takeshi
中科院分区:
医学3区
文献类型:
--
作者:
Sato, Naoki;Maeda, Masao;Sugiyama, Mai;Ito, Satoko;Hyodo, Toshinori;Masuda, Akio;Tsunoda, Nobuyuki;Kokuryo, Toshio;Hamaguchi, Michinari;Nagino, Masato;Senga, Takeshi

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RNA剪接是蛋白质合成的基本过程。最近的研究报道,抑制剪接的药物对多种肿瘤细胞系具有细胞毒作用。在本报告中,我们证明剪接体成分 SNW1 的缺失会诱导乳腺癌细胞凋亡。蛋白质组学和生化分析表明,SNW1 直接与其他剪接体成分相关,包括 EFTUD2 (Snu114) 和 SNRNP200 (Brr2)。 SNW1 的 SKIP 区域与 EFTUD2 的 N 末端以及 SNRNP200 C 末端的两个独立区域相互作用。与 SNW1 耗竭类似,EFTUD2 的敲除增加了凋亡细胞的数量。此外,我们证明SNW1的SKIP区域或EFTUD2的N末端区域的外源表达显着促进细胞凋亡。我们的结果表明,抑制 SNW1 或其相关蛋白可能是一种新的癌症治疗策略。
RNA splicing is a fundamental process for protein synthesis. Recent studies have reported that drugs that inhibit splicing have cytotoxic effects on various tumor cell lines. In this report, we demonstrate that depletion of SNW1, a component of the spliceosome, induces apoptosis in breast cancer cells. Proteomics and biochemical analyses revealed that SNW1 directly associates with other spliceosome components, including EFTUD2 (Snu114) and SNRNP200 (Brr2). The SKIP region of SNW1 interacted with the N-terminus of EFTUD2 as well as two independent regions in the C-terminus of SNRNP200. Similar to SNW1 depletion, knockdown of EFTUD2 increased the numbers of apoptotic cells. Furthermore, we demonstrate that exogenous expression of either the SKIP region of SNW1 or the N-terminus region of EFTUD2 significantly promoted cellular apoptosis. Our results suggest that the inhibition of SNW1 or its associating proteins may be a novel therapeutic strategy for cancer treatment.
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