VHL substrate transcription factor ZHX2 as an oncogenic driver in clear cell renal cell carcinoma.
VHL substrate transcription factor ZHX2 as an oncogenic driver in clear cell renal cell carcinoma.
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DOI:
10.1126/science.aap8411
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发表时间:
2018-07-20
期刊:
影响因子:
--
通讯作者:
Zhang Q
中科院分区:
文献类型:
--
作者:
Zhang J;Wu T;Simon J;Takada M;Saito R;Fan C;Liu XD;Jonasch E;Xie L;Chen X;Yao X;Teh BT;Tan P;Zheng X;Li M;Lawrence C;Fan J;Geng J;Liu X;Hu L;Wang J;Liao C;Hong K;Zurlo G;Parker JS;Auman JT;Perou CM;Rathmell WK;Kim WY;Kirschner MW;Kaelin WG Jr;Baldwin AS;Zhang Q
Inactivation of the von Hippel-Lindau (VHL) E3 ubiquitin ligase protein is a hallmark of clear cell renal cell carcinoma (ccRCC). Identifying how pathways affected by VHL loss contribute to ccRCC remains challenging. We used a genome-wide in vitro expression strategy to identify proteins that bound VHL when hydroxylated. Zinc fingers and homeoboxes 2 (ZHX2) was found as a VHL target and its hydroxylation allowed VHL to regulate its protein stability. Tumor cells from ccRCC patients with VHL loss-of-function mutations usually had increased abundance and nuclear localization of ZHX2. Functionally, depletion of ZHX2 inhibited VHL-deficient ccRCC cell growth in vitro and in vivo. Mechanistically, integrated ChIP-Seq and microarray analysis showed that ZHX2 promoted NF-κB activation. These studies reveal ZHX2 as a potential therapeutic target for ccRCC. A genome-wide screen identified ZHX2 as a hydroxylation-dependent VHL substrate that promotes NF-κB activity and ccRCC tumorigenesis
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