Cancer-fighting Strategy: Turning Iron-Heavy 'Zombie' Cells Against Their Tumors

Researchers uncovered a vulnerability in senescent “zombie” cells that accumulate in tumors and aging tissues: they rely on GPX4 to shield themselves from iron-driven ferroptosis. Blocking GPX4 with covalent inhibitors exposes these iron-loaded cells to ferroptotic death. In a screen of 10,000 compounds, four senolytics stood out, three targeting GPX4, and testing in three mouse cancer models showed reduced tumor size and improved survival, suggesting potential to combine this approach with chemotherapy or immunotherapy. Ongoing work will identify which cancers and patients are most likely to benefit and how this affects anti-tumor immunity.