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Targeting GPX4 palmitoylation to boost antitumor immunity.

Daehee Hwang1, Whitney S Henry1

  • 1Department of Biology, Massachusetts Institute of Technology, Koch Institute for Integrative Cancer Research, Cambridge, MA, USA.

Trends in Cancer
|May 15, 2025
PubMed
Summary

Cancer cells evade immune detection by resisting ferroptosis, a cell death process. Researchers found that inhibiting glutathione peroxidase 4 (GPX4) palmitoylation can enhance this cell death, improving immunotherapy outcomes.

Keywords:
GPX4ferroptosisimmune-checkpoint blockade (ICB)palmitoylationtumor microenvironment (TME)zDHHC8

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Area of Science:

  • Cancer research
  • Immunology
  • Cellular biology

Background:

  • Cancer immunotherapy has advanced, yet tumor cells frequently evade immune surveillance.
  • Ferroptosis, a regulated form of cell death, is a key mechanism in cancer therapy.
  • Glutathione peroxidase 4 (GPX4) is a critical suppressor of ferroptosis.

Purpose of the Study:

  • To investigate the role of GPX4 modification in ferroptosis resistance.
  • To explore the potential of targeting GPX4 for cancer immunotherapy.

Main Methods:

  • The study focused on the interaction between GPX4 and the enzyme zDHHC8.
  • Investigated the process of GPX4 palmitoylation and its effect on ferroptosis.

Main Results:

  • Zhou et al. demonstrated that zDHHC8 mediates the palmitoylation of GPX4.
  • This palmitoylation enhances GPX4's ability to suppress ferroptosis, conferring resistance to tumor cells.
  • GPX4 palmitoylation was identified as a mechanism for tumor cells to escape immune surveillance.

Conclusions:

  • Targeting GPX4 palmitoylation presents a novel strategy to overcome ferroptosis resistance in cancer.
  • Enhancing ferroptosis through inhibition of GPX4 palmitoylation could improve the efficacy of cytotoxic T cell-mediated cancer immunotherapy.