GoKawiilHuman cells have built-in mechanisms that trigger their own death when intracellular damage or extracellular death signals accumulate. One such mechanism is ferroptosis1, by which free reactive iron-containing molecules inside cells react with cellular components (especially membrane lipids) to trigger the death of the cell. Ferroptosis contributes to tissue damage after events such as a temporary loss of blood flow, but it also limits the development or progression of diseases such as cancer2,3. Writing in Nature, Li et al.4 reveal that a product of cellular metabolism (a metabolite) called spermine can trap iron, blocking this death program. This finding not only clarifies how cells defend themselves against damage, but also points to promising opportunities for treating tissue damage and cancer.
doi: https://doi.org/10.1038/d41586-026-01802-3
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Competing Interests The authors declare no competing interests.
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