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Updated: Jan 9, 2026
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Author Spotlight: Tracing the Ferroptotic Signatures and Cell Death Dynamics in Medulloblastoma for Advanced Therapeutics
Published on: March 15, 2024
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Macrophages rescue cells from ferroptotic death
Ruth Hefetz1, Sapir Harush2, Lucy Ghantous1
1Goldyne Savad Institute of Gene Therapy, Hadassah Medical Center, Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel.
Cell Death & Disease
|December 1, 2025
Summary
Macrophages can prevent cancer cells from dying via ferroptosis, a process involving iron and lipid peroxidation. This protective effect, mediated by cell-to-cell contact, is reduced when macrophages polarize into M1 types.
Area of Science:
- Cell biology
- Immunology
- Cancer research
Background:
- Ferroptosis, an iron-dependent form of cell death, plays a role in organ injury, degenerative diseases, and cancer therapy resistance.
- While intracellular mechanisms of ferroptosis are known, extracellular factors influencing cell sensitivity remain unclear.
Purpose of the Study:
- To investigate the role of macrophages in modulating ferroptosis in cancer cells.
- To identify the mechanisms by which macrophages influence ferroptosis and explore potential therapeutic applications.
Main Methods:
- Co-culture of various cancer cell types with macrophages.
- Induction of ferroptosis using GPX4 inhibitors (RSL3, ML162), GPX4 silencing, or Xc- system inhibitor (IKE).
- Assessment of cell death, lipid peroxidation, and cell surface markers (CD47, phosphatidylserine) in ferroptotic cells.
- Evaluation of macrophage differentiation (M1 vs. M2) and cell-to-cell contact dependency.
Main Results:
- Macrophages significantly reduced ferroptosis and lipid peroxidation in cancer cells, irrespective of the ferroptosis inducer.
- Macrophage protection was dependent on direct cell-to-cell contact.
- M1-polarized macrophages exhibited reduced protective capabilities compared to M2.
- Ferroptotic cells displayed elevated CD47 ('don't eat me' signal) and reduced phosphatidylserine (PS, 'eat me' signal), facilitating macrophage interaction.
- Macrophages protected trophoblasts from ferroptosis in placental villi explants.
Conclusions:
- Macrophages possess an unrecognized anti-ferroptotic activity, acting as a cell-extrinsic protective mechanism.
- Cancer cells may exploit this macrophage-mediated protection to escape ferroptosis.
- Understanding this interaction is crucial for developing novel cancer therapies targeting ferroptosis.
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