Li Yang;Xin Chen;Qianqian Yang;Jinghong Chen;Qingtian Huang;Leyi Yao;Ding Yan;Jiawen Wu;Peiquan Zhang;Daolin Tang;南山 钟;Jinbao Liu
Guizhou Medical University;Guangzhou Medical College;University of Texas Southwestern Medical Center;China Association for Science and Technology
发表时间:2020-6-12
期 刊:Frontiers in Oncology
语 言:English
U R L: http://www.scopus.com/inward/record.url?scp=85087183676&partnerID=8YFLogxK
Proteasomal deubiquitinase (DUB) inhibition has been found to be effective in experimental cancer therapy by inducing proteasome inhibition and apoptosis. Ferroptosis is a form of regulated cell death characterized by an iron-dependent lipid peroxidation. Antioxidant enzyme glutathione peroxidase 4 (GPX4) plays a key role in blocking ferroptosis through directly reducing phospholipid hydroperoxides production. Since cytoplasmic DUB inhibition can promote protein degradation in the cell, we hypothesize that DUB inhibition induces GPX4 degradation. Here we used palladium pyrithione complex (PdPT), a broad spectrum deubiquitinase inhibitor, to explore its cell death induction and anti-cancer effect in vitro, ex vivo, and in vivo. Mechanically, caspase activation and GPX4 protein degradation are required for PdPT-induced apoptosis and ferroptosis, respectively. Notably, PdPT-induced multiple deubiquitinase inhibition is essential for proteasomal degradation of GPX4. These findings not only identify a novel mechanism of post-translational modification of GPX4 in ferroptosis, but also suggest a potential anti-caner therapeutic strategy using Pan-DUB inhibition.
医学与生命科学
Scopus度量
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2012 | 0.7 | 0.133 | 0.096 |
2013 | 1.7 | 1.355 | 0.745 |
2014 | 3.5 | 1.66 | 0.845 |
2015 | 6.3 | 2.088 | 1.09 |
2016 | 8.4 | 2.042 | 1.213 |
2017 | 8.6 | 2.023 | 1.356 |
2018 | 5.4 | 1.918 | 1.213 |
2019 | 3.5 | 1.654 | 1.117 |
2020 | 3.7 |
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