Abstract
Ferroptosis is a recently emerging non-apoptotic mode of cell death involving the production of iron-dependent reactive oxygen species (ROS). Here we described a mitochondria-targeted iridium (III) complex IrFN that exhibited potent antiproliferative activity against a variety of cancer cells, especially the A2780 human ovarian cancer cells, through the ferroptosis pathways. Mechanistic studies by label-free quantitative proteomics profiling indicated that heme oxygenase 1 (HMOX1)-mediated ferroptosis process was activated by IrFN. The study on iron-dependent cell death, ROS accumulation, lipid peroxidation, and over released iron further confirmed the ferroptosis processes. mRNA transcription quantification, in vitro over-expression of HMOX1, and RNAi-mediated knock-down experiments suggested that IrFN activated the over-expression of HMOX1. Our report revealed the first case of anticancer iridium complex leading to ferroptosis, highlighting ferroptosis as a promising approach in future design of metallodrugs.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (21622103, 21671099, 91753121), Shenzhen Basic Research Program (JCYJ20170413150538897, JCYJ20180508182240106), and the Fundamental Research Funds for the Central Universities (020814380109). F. Chen thanks the International Postdoctoral Exchange Fellowship Program of China. We thank the Shanghai Applied Protein Technology Co., Ltd., for technological assistance.
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Wang, X., Chen, F., Zhang, J. et al. A ferroptosis-inducing iridium(III) complex. Sci. China Chem. 63, 65–72 (2020). https://doi.org/10.1007/s11426-019-9577-3
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DOI: https://doi.org/10.1007/s11426-019-9577-3