HAUSP deubiquitinates and stabilizes N-Myc in neuroblastoma.
HAUSP deubiquitinates and stabilizes N-Myc in neuroblastoma.
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DOI:
10.1038/nm.4180
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发表时间:
2016-10
期刊:
影响因子:
82.9
通讯作者:
Gu, Wei
中科院分区:
文献类型:
--
作者:
Tavana, Omid;Li, Dawei;Dai, Chao;Lopez, Gonzalo;Banerjee, Debarshi;Kon, Ning;Chen, Chao;Califano, Andrea;Yamashiro, Darrell J.;Sun, Hongbin;Gu, Wei
The MYCN protooncogene is amplified in a number of advanced-stage human tumors such as neuroblastomas. Like other members of Myc family proteins, N-Myc is a transcription factor and its stability and activity are tightly controlled by ubiquitination-dependent proteasome degradation. Although numerous studies demonstrate that N-Myc acts as a driver of neuroblastoma tumorigenesis, therapies that directly suppress N-Myc activity in human tumors are limited. Here, we have identified the herpesvirus-associated ubiquitin-specific protease (HAUSP or USP7) as a regulator of N-Myc in neuroblastoma. HAUSP interacts with N-Myc, and HAUSP expression induces deubiquitination and subsequent stabilization of N-Myc. Conversely, RNAi-mediated knockdown of HAUSP in neuroblastoma cancer cell lines, or genetic ablation of Hausp in the mouse brain destabilizes N-Myc, which leads to inhibition of N-Myc function. Notably, HAUSP is more abundant in neuroblastoma patients with poorer prognosis and HAUSP expression significantly correlates with N-Myc transcriptional activity. Furthermore, small molecule inhibitors against HAUSP deubiquitinase activity significantly suppress the growth of MYCN-amplified human neuroblastoma cell lines in xenograft mouse models. Together, our findings demonstrate a crucial role of HAUSP in regulating N-Myc function in vivo and suggest that HAUSP inhibition is a potential therapy for MYCN-amplified tumors.
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影响因子:
16
作者:
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影响因子:
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DOI:
10.1073/pnas.172398399
发表时间:
2002-08-20
影响因子:
11.1
作者:
Kim, ES;Serur, A;Yamashiro, DJ
通讯作者:
Yamashiro, DJ