A compendium of kinetic modulatory profiles identifies ferroptosis regulators.

A compendium of kinetic modulatory profiles identifies ferroptosis regulators.
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DOI:
10.1038/s41589-021-00751-4
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发表时间:
2021-06
影响因子:
14.8
通讯作者:
Dixon SJ
Dixon SJ
中科院分区:
生物学1区
文献类型:
--
作者:
Conlon M;Poltorack CD;Forcina GC;Armenta DA;Mallais M;Perez MA;Wells A;Kahanu A;Magtanong L;Watts JL;Pratt DA;Dixon SJ

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Cell death can be executed by regulated apoptotic and non-apoptotic pathways, including the iron-dependent process of ferroptosis. Small molecules are essential tools for studying the regulation of cell death. Using time-lapse imaging, and a library of 1,833 bioactive compounds, we assembled a large compendium of kinetic cell death modulatory profiles for inducers of apoptosis and ferroptosis. From this dataset we identify dozens of ferroptosis suppressors, including numerous compounds that appear to act via cryptic off-target antioxidant or iron chelating activities. We show that the FDA-approved drug bazedoxifene acts as a potent radical trapping antioxidant inhibitor of ferroptosis both in vitro and in vivo. ATP-competitive mechanistic target of rapamycin (mTOR) inhibitors, by contrast, are on-target ferroptosis inhibitors. Further investigation revealed both mTOR-dependent and mTOR-independent mechanisms that link amino acid metabolism to ferroptosis sensitivity. These results highlight kinetic modulatory profiling as a useful tool to investigate cell death regulation.
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