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Updated: May 10, 2025

Methods for Evaluating the Role of c-Fos and Dusp1 in Oncogene Dependence
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Targeting IDH1 mutation-driven Nrf2 signaling to suppress malignant behavior in fibrosarcoma cells

Seoyeon Park1, Kyung-Soo Chun2, Do-Hee Kim1

  • 1Department of Chemistry, Kyonggi University, Suwon, 16227 Republic of Korea.

Toxicological Research
|April 28, 2025
PubMed

Insights

Isocitrate dehydrogenase 1 (IDH1) mutations impair antioxidant pathways and promote cancer progression. Targeting the IDH1-Nrf2 axis may offer new therapeutic strategies for IDH1-mutant cancers by regulating immune response and cell migration.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Isocitrate dehydrogenase 1 (IDH1) mutations are common in cancers, affecting cellular metabolism and redox balance.
  • IDH1 mutations lead to reduced nicotinamide adenine dinucleotide phosphate (NADPH) and impaired glutathione synthesis.
  • Nuclear factor erythroid-2-related factor 2 (Nrf2) is a key regulator of antioxidant responses.

Purpose of the Study:

  • To investigate the role of IDH1 mutations in regulating Nrf2-mediated signaling pathways in fibrosarcoma.
  • To explore the impact of IDH1 inhibition on cancer cell behavior and immune evasion.

Main Methods:

  • Utilized siRNA to knockdown IDH1 in HT1080 fibrosarcoma cells.
  • Assessed Nrf2 stabilization, antioxidant gene expression, reactive oxygen species (ROS) production, and cell migration.
  • Employed small molecule inhibitors targeting IDH1 R132 mutations.
  • Analyzed the expression of programmed death-ligand 1 (PD-L1).

Main Results:

  • IDH1 knockdown inhibited Nrf2 stabilization and reduced antioxidant gene expression, favoring cancer progression.
  • IDH1 inhibition decreased ROS production and impaired cell migration and colony formation.
  • Targeting IDH1 R132 mutations suppressed cell migration and colony formation.
  • IDH1 and Nrf2 modulate PD-L1 expression, contributing to immune evasion.

Conclusions:

  • IDH1 mutations play a critical role in regulating Nrf2-mediated antioxidant defense and promoting malignant phenotypes.
  • Targeting the IDH1-Nrf2 axis presents a potential therapeutic strategy for IDH1-mutant cancers.
  • This axis influences immune evasion via PD-L1 modulation, offering insights for immunotherapy development.
Keywords:
Antioxidant enzymeFibrosarcomaIDH1 mutationNrf2PD-L1

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