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Updated: Aug 28, 2025
Author Spotlight: Tracing the Ferroptotic Signatures and Cell Death Dynamics in Medulloblastoma for Advanced Therapeutics
Published on: March 15, 2024
Iron metabolism mediates microglia susceptibility in ferroptosis
Lingling Jiao1, Xiaolan Li1, Yuxiang Luo1
1Department of Neurology and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China.
Abstract:
Ferroptosis is implicated in a range of brain disorders, but it is unknown whether neurons or glia in the brain are particularly effected. Here, we report that primary cortical astrocytes (PA), microglia (PM), and neurons (PN) varied in their sensitivities to ferroptosis. Specifically, PM were the most sensitive to ferroptosis, while PN were relatively insensitive. In contrast, PN and PM were equally susceptible to apoptosis, with PA being less affected, whereas all three cell types were similarly susceptible to autophagic cell death. In the tri-culture system containing PA, PM, and PN, the cells were more resistant to ferroptosis than that in the monoculture. These results demonstrated that brain cells exhibit different sensitivities under ferroptosis stress and the difference may be explained by the differentially regulated iron metabolism and the ability to handle iron. Continued elucidation of the cell death patterns of neurons and glia will provide a theoretical basis for related strategies to inhibit the death of brain cells.
Insights
Microglia are most sensitive to ferroptosis, while neurons are resistant. Brain cells show varied ferroptosis sensitivity, impacting brain disorder research and therapeutic strategies.
Area of Science:
- Neuroscience
- Cell Biology
- Biochemistry
Background:
- Ferroptosis, a form of regulated cell death, is linked to various brain disorders.
- Understanding cell-type-specific responses to ferroptosis in the brain is crucial for disease mechanism elucidation.
Purpose of the Study:
- To investigate the differential sensitivities of primary cortical astrocytes (PA), microglia (PM), and neurons (PN) to ferroptosis.
- To compare ferroptosis sensitivity with other cell death pathways like apoptosis and autophagic cell death.
- To examine the impact of co-culturing these brain cells on ferroptosis resistance.
Main Methods:
- Primary cell cultures of astrocytes, microglia, and neurons were established.
- Cells were subjected to ferroptosis-inducing conditions.
- Sensitivity to ferroptosis, apoptosis, and autophagic cell death was assessed across monocultures and a tri-culture system.
Main Results:
- Microglia (PM) exhibited the highest sensitivity to ferroptosis, whereas neurons (PN) were relatively insensitive.
- Neurons (PN) and microglia (PM) showed similar susceptibility to apoptosis, with astrocytes (PA) being less affected.
- All three cell types demonstrated comparable susceptibility to autophagic cell death.
- In a tri-culture system, brain cells displayed increased resistance to ferroptosis compared to monocultures.
Conclusions:
- Brain cells, including neurons and glia, possess distinct sensitivities to ferroptosis, likely due to differential regulation of iron metabolism.
- These findings provide critical insights into cell death mechanisms in the brain and lay the groundwork for developing targeted therapeutic strategies for brain disorders involving ferroptosis.
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