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Updated: Feb 24, 2026

Author Spotlight: Tracing the Ferroptotic Signatures and Cell Death Dynamics in Medulloblastoma for Advanced Therapeutics
Published on: March 15, 2024
The Tumor Suppressor p53 Limits Ferroptosis by Blocking DPP4 Activity.
Yangchun Xie1, Shan Zhu2, Xinxin Song3
1The Third Affiliated Hospital, Center for DAMP Biology, Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, Protein Modification and Degradation Laboratory, Guangzhou Medical University, Guangzhou, Guangdong 510510, China; Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China; Department of Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA.
The tumor suppressor p53 (TP53) limits ferroptosis by inhibiting dipeptidyl-peptidase-4 (DPP4) activity. Loss of TP53 promotes lipid peroxidation and cell death, offering a potential strategy for colorectal cancer treatment.
Area of Science:
- Cell Biology
- Biochemistry
- Oncology
Background:
- Ferroptosis is a regulated cell death mechanism with potential in cancer therapy.
- The tumor suppressor p53 (TP53) is known to influence ferroptosis through transcription-dependent pathways.
Purpose of the Study:
- To investigate the role of TP53 in ferroptosis independent of its transcriptional activity.
- To elucidate the molecular mechanisms by which TP53 regulates ferroptosis, focusing on DPP4 activity.
Main Methods:
- Investigated the interaction between TP53 and dipeptidyl-peptidase-4 (DPP4).
- Assessed the impact of TP53 status on DPP4 activity and localization.
- Analyzed lipid peroxidation levels and ferroptosis induction in response to erastin.
Main Results:
- TP53 limits erastin-induced ferroptosis via a transcription-independent mechanism.
- Loss of TP53 leads to increased plasma-membrane-associated DPP4 activity and lipid peroxidation.
- TP53 normally prevents nuclear accumulation of DPP4, thereby limiting ferroptosis.
Conclusions:
- TP53 directly regulates DPP4 activity in a non-transcriptional manner to control ferroptosis.
- This TP53-DPP4 axis offers a novel molecular link in lipid metabolism regulation.
- Targeting this pathway may present a precision medicine approach for ferroptosis induction in colorectal cancer.
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