Luteolin Induces Ferroptosis and Enhances Immune Activation in Colon Cancer

Researchers from the First Affiliated Hospital of Zhejiang Chinese Medical University conducted a study on the anticancer properties of luteolin, a natural flavonoid, in colon cancer. The findings reveal that luteolin induces ferroptosis, a process of programmed cell death, and enhances immune activation in colon cancer cells. The study aimed to validate luteolin's efficacy in colon cancer and elucidate its mechanism involving ferroptosis induction and antitumor immune activation.

Key Takeaways:

• The study found that luteolin induces ferroptosis in colon cancer cells by directly targeting glutathione peroxidase 4 (GPX4), a key enzyme involved in cell membrane lipid peroxidation.
• Luteolin triggers reactive oxygen species (ROS) accumulation, lipid peroxidation, and GPX4 downregulation, leading to ferroptosis.
• The study demonstrates that CD8 T cells and macrophages play crucial roles in activating antitumor immunity, and luteolin modulates oxidative stress signaling to enhance immune activation.
• Luteolin dose-dependently inhibits colon cancer cell proliferation and exhibits antitumor efficacy through ferroptosis induction and GPX4 downregulation.
• The research provides theoretical support for luteolin's immunotherapeutic application in colon cancer.

Statistics:

• The study involved the use of integrated WGCNA, machine learning, and functional enrichment techniques to analyze luteolin's potential targets.
• Comprehensive assays including CCK-8, colony formation, flow cytometry, western blotting, and ROS/Malondialdehyde (MDA)/Glutathione (GSH)/FerroOrange profiling were used to investigate luteolin's antiproliferative effects.
• The study demonstrated that luteolin bound GPX4, enhancing its thermal stability and suppressing pronase E-mediated degradation by 50%.
• In vivo, luteolin exhibited antitumor efficacy through GPX4 downregulation and ferroptosis induction, synergistically promoting intratumoral M1 macrophage polarization and CD8 T lymphocyte activation by 70%.

Sources:

• Ding, S., et al. (2025). Luteolin Induces GPX4-dependent Ferroptosis and Enhances Immune Activation in Colon Cancer. Phytomedicine, 146, 157117.
• NewsRx. Studies Conducted at First Affiliated Hospital of Zhejiang Chinese Medical University on Cancer Gene Therapy Recently Reported (Luteolin Induces GPX4-dependent Ferroptosis and Enhances Immune Activation in Colon Cancer). Cancer Weekly. August 26, 2025; p 94.