Ferroptosis: An Iron-Dependent Form of Non-Apoptotic Cell Death

Ferroptosis: An Iron-Dependent Form of Non-Apoptotic Cell Death

2012 May 25 | Scott J. Dixon¹, Kathryn M. Lemberg¹, Michael R. Lamprecht³, Rachid Skouta¹, Eleina M. Zaitsev¹, Caroline E. Gleason¹, Darpan N. Patel¹, Andras J. Bauer¹, Alexandra M. Cantley¹, Wan Seok Yang¹, Barclay Morrison III³, and Brent R. Stockwell¹,²,⁴,⁵
Ferroptosis is an iron-dependent form of non-apoptotic cell death identified by Scott J. Dixon and colleagues. This process is distinct from apoptosis, necrosis, and autophagy, and is characterized by the accumulation of lipid reactive oxygen species (ROS) and iron-dependent oxidative damage. The small molecule erastin triggers ferroptosis by inhibiting cystine uptake via the cystine/glutamate antiporter (system x_c-), leading to a depletion of antioxidant defenses and subsequent iron-dependent cell death. Ferrostatin-1, a small molecule inhibitor, was found to prevent ferroptosis in cancer cells and glutamate-induced cell death in brain slices, suggesting a shared mechanism between these processes. Ferroptosis is regulated by a distinct set of genes, including RPL8, IREB2, ATP5G3, TTC35, CS, and ACSF2, which are required for the synthesis of lipid precursors necessary for the process. The study also highlights the role of the NADPH oxidase family in generating ROS that contribute to ferroptosis. Ferroptosis is a promising target for therapeutic intervention in cancer and neurodegenerative diseases, as it can be selectively activated or inhibited to destroy RAS-mutant tumor cells or protect neurons from oxidative stress. The findings provide a deeper understanding of the molecular mechanisms underlying iron-dependent cell death and open new avenues for the development of targeted therapies.Ferroptosis is an iron-dependent form of non-apoptotic cell death identified by Scott J. Dixon and colleagues. This process is distinct from apoptosis, necrosis, and autophagy, and is characterized by the accumulation of lipid reactive oxygen species (ROS) and iron-dependent oxidative damage. The small molecule erastin triggers ferroptosis by inhibiting cystine uptake via the cystine/glutamate antiporter (system x_c-), leading to a depletion of antioxidant defenses and subsequent iron-dependent cell death. Ferrostatin-1, a small molecule inhibitor, was found to prevent ferroptosis in cancer cells and glutamate-induced cell death in brain slices, suggesting a shared mechanism between these processes. Ferroptosis is regulated by a distinct set of genes, including RPL8, IREB2, ATP5G3, TTC35, CS, and ACSF2, which are required for the synthesis of lipid precursors necessary for the process. The study also highlights the role of the NADPH oxidase family in generating ROS that contribute to ferroptosis. Ferroptosis is a promising target for therapeutic intervention in cancer and neurodegenerative diseases, as it can be selectively activated or inhibited to destroy RAS-mutant tumor cells or protect neurons from oxidative stress. The findings provide a deeper understanding of the molecular mechanisms underlying iron-dependent cell death and open new avenues for the development of targeted therapies.
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[slides and audio] Ferroptosis%3A An Iron-Dependent Form of Nonapoptotic Cell Death