SHANK1 facilitates non-small cell lung cancer processes through modulating the ubiquitination of Klotho by interacting with MDM2.

SHANK1 facilitates non-small cell lung cancer processes through modulating the ubiquitination of Klotho by interacting with MDM2.
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SHANK1 通过与 MDM2 相互作用调节 Klotho 泛素化来促进非小细胞肺癌进程

DOI:
10.1038/s41419-022-04860-3
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发表时间:
2022-04-25
影响因子:
9
通讯作者:
Wu, Jianqing
Wu, Jianqing
中科院分区:
生物学1区
文献类型:
--
作者:
Chen, Bo;Zhao, Hongye;Li, Min;She, Quan;Liu, Wen;Zhang, Jiayi;Zhao, Weihong;Huang, Shuhong;Wu, Jianqing

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SH3和多锚蛋白重复结构域1(SHANK1)是一种支架蛋白,在神经系统的正常功能中起着重要作用。它最近被证明是一种潜在的致癌基因。在本研究中,我们报道SHANK1在非小细胞肺癌(NSCLC)中表达上调,并与NSCLC的临床病理特征相关。此外,SHANK1过表达增强NSCLC细胞的增殖、迁移和侵袭。小鼠细胞来源的异种移植模型也证实了SHANK1对体内肿瘤生长的影响。此外,我们发现SHANK1通过泛素化依赖性途径增加Klotho(KL)的蛋白降解,Klotho(KL)是一种重要的肿瘤抑制因子。特别是,我们报告发现KL作为SHANK1相互作用蛋白,作为E3泛素连接酶MDM2的一个新的子状态。SHANK1可以与KL和MDM2形成复合物,增强KL和MDM2之间的相互作用。我们的研究结果揭示了SHANK1的重要致癌作用和机制,提示SHANK1可能是NSCLC的潜在治疗靶点。
SH3 and multiple ankyrin repeat domains 1 (SHANK1) is a scaffold protein, plays an important role in the normal function of neuron system. It has recently been shown to be a potential oncogene. In the present study, we report that the expression of SHANK1 is upregulated in non-small cell lung cancer (NSCLC), and is correlated with clinic pathological characteristics of NSCLC. Moreover, SHANK1 overexpression enhances the proliferation, migration and invasion of NSCLC cells. Mouse cell-derived xenograft model also confirmed the effects of SHANK1 on tumor growth in vivo. Furthermore, we found that SHANK1 increases the protein degradation of Klotho (KL), an important tumor suppressor, through ubiquitination-dependent pathway. In particular, we report discovery of KL as a SHANK1-interacting protein that acts as a new substate of the E3 ubiquitin ligase MDM2. SHANK1 can form a complex with KL and MDM2 and enhance the interaction between KL and MDM2. Our findings reveal an important oncogenic role and mechanism of SHANK1, suggesting SHANK1 can be a potential therapeutic target in NSCLC.
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