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Updated: Jun 7, 2025

Author Spotlight: Tracing the Ferroptotic Signatures and Cell Death Dynamics in Medulloblastoma for Advanced Therapeutics
04:01

Author Spotlight: Tracing the Ferroptotic Signatures and Cell Death Dynamics in Medulloblastoma for Advanced Therapeutics

Published on: March 15, 2024

874

MDM4 inhibits ferroptosis in p53 mutant colon cancer via regulating TRIM21/GPX4 expression

Jie Liu1,2, Xujin Wei3, Yixuan Xie1

  • 1Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China.

Cell Death & Disease
|November 14, 2024
PubMed

Insights

MDM4 overexpression in colon cancer hinders ferroptosis by stabilizing GPX4, leading to poor prognosis and chemotherapy resistance, particularly in p53-mutated tumors.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • MDM4 is a key regulator of p53, but its role in colon cancer is not fully understood.
  • The biological effects of MDM4 in tumor progression and prognosis remain controversial.
  • Understanding MDM4's mechanism in colon cancer is crucial for developing targeted therapies.

Purpose of the Study:

  • To investigate the role and molecular mechanism of MDM4 in colon cancer progression and prognosis.
  • To elucidate how MDM4 influences ferroptosis and chemotherapy resistance in colon cancer.
  • To identify potential therapeutic targets for MDM4-driven colon cancer.

Main Methods:

  • Analysis of MDM4 expression in human colon cancer tissues.
  • Correlation of MDM4 expression with patient prognosis, specifically in cases with mutant p53.
  • Investigation of MDM4's effect on GPX4 ubiquitination and stability.
  • Examination of the regulatory relationship between MDM4, TRIM21, and GPX4.

Main Results:

  • MDM4 is significantly overexpressed in colon cancer, associated with poor prognosis in p53-mutant cases.
  • MDM4 upregulates TRIM21, inhibiting GPX4 ubiquitination and enhancing GPX4 protein stability.
  • MDM4 promotes ferroptosis inhibition, chemotherapy resistance, and colon cancer progression.
  • The MDM4/TRIM21/GPX4 axis plays a critical role in p53-mutated colon cancer.

Conclusions:

  • MDM4 promotes colon cancer progression and chemoresistance by inhibiting ferroptosis via the TRIM21/GPX4 pathway.
  • High MDM4 expression is a marker of poor prognosis in p53-mutated colon cancer.
  • Targeting the MDM4/TRIM21/GPX4 axis offers a potential therapeutic strategy for colon cancer.

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