Discovery of a First-in-Class Degrader for the Lipid Kinase PIKfyve.
Discovery of a First-in-Class Degrader for the Lipid Kinase PIKfyve.
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DOI：
10.1021/acs.jmedchem.3c00912
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发表时间：
2023-09-14
影响因子：
7.3
通讯作者：
Ding, Ke
中科院分区：
文献类型：
--
作者：
Li, Chungen;Qiao, Yuanyuan;Jiang, Xia;Liu, Lianchao;Zheng, Yang;Qiu, Yudi;Cheng, Caleb;Zhou, Fengtao;Zhou, Yang;Huang, Weixue;Ren, Xiaomei;Wang, Yuzhuo;Wang, Zhen;Chinnaiyan, Arul M.;Ding, Ke
The phosphoinositide kinase PIKfyve has emerged as a new potential therapeutic target in various cancers. However, limited clinical progress has been achieved with PIKfyve inhibitors. Here, we report the discovery of a first-in-class PIKfyve degrader 12d (PIK5-12d) by employing the proteolysis-targeting chimera approach. PIK5-12d potently degraded PIKfyve protein with a DC50 value of 1.48 nM and a Dmax value of 97.7% in prostate cancer VCaP cells. Mechanistic studies revealed that it selectively induced PIKfyve degradation in a VHL- and proteasome-dependent manner. PIKfyve degradation by PIK5-12d caused massive cytoplasmic vacuolization and blocked autophagic flux in multiple prostate cancer cell lines. Importantly, PIK5-12d was more effective in suppressing the growth of prostate cancer cells than the parent inhibitor and exerted prolonged inhibition of downstream signaling. Further, intraperitoneal administration of PIK5-12d exhibited potent PIKfyve degradation and suppressed tumor proliferation in vivo. Overall, PIK5-12d is a valuable chemical tool for exploring PIKfyve-based targeted therapy.
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影响因子：
7.3
作者：
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