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Updated: Jun 11, 2025

Author Spotlight: Tracing the Ferroptotic Signatures and Cell Death Dynamics in Medulloblastoma for Advanced Therapeutics
Published on: March 15, 2024
Serum apolipoprotein H determines ferroptosis resistance by modulating cellular lipid composition
Xiang He1, Jiahui Zhang1, Masha Huang1
1Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory for Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Serum protein apolipoprotein H (APOH) inhibits ferroptosis, a cell death process. APOH activates a pathway that increases fatty acids, preventing ferroptosis and offering potential cancer therapies.
Area of Science:
- Cellular Biology
- Biochemistry
- Oncology
Background:
- Ferroptosis is an iron-dependent regulated cell death characterized by lipid peroxidation.
- Environmental factors, including serum, significantly influence cellular susceptibility to ferroptosis.
Purpose of the Study:
- To investigate the impact of serum on ferroptosis induction.
- To identify specific serum factors that modulate ferroptosis.
- To elucidate the molecular mechanisms by which these factors inhibit ferroptosis.
Main Methods:
- Investigated the influence of sera on ferroptosis induction in cellular models.
- Identified apolipoprotein H (APOH) as a key ferroptosis inhibitor in serum.
- Elucidated the molecular pathway involving PI3K-AKT-SREBPs and SCD activation by APOH.
Main Results:
- Apolipoprotein H (APOH) was identified as a critical inhibitor of ferroptosis.
- APOH suppresses ferroptosis by activating the PI3K-AKT-SREBPs pathway, upregulating SCD.
- This leads to increased monounsaturated fatty acid-containing phospholipids (MUFA-PLs) and ferroptosis resistance.
- ApoHinfer, a peptide derivative, demonstrated similar ferroptosis inhibitory activity.
Conclusions:
- Serum protein APOH plays a crucial role in inhibiting ferroptosis.
- The APOH-mediated inhibition involves the PI3K-AKT-SREBPs-SCD pathway and MUFA-PL synthesis.
- APOH and its derivatives represent potential therapeutic agents for ferroptosis-related diseases, including cancer.
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