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Oxidizing to optimize stemness and antitumor immunity.

Julian J Lum1

  • 1Trev and Joyce Deeley Research Centre, BC Cancer, Victoria, BC, Canada; Basic and Translational Research, BC Cancer Research Institute, Victoria, BC, Canada; Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada; The Metabolomics Consortium of BC, Victoria, BC, Canada; Institute of Health Literacy, Victoria, BC, Canada.

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|March 20, 2026
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Summary
This summary is machine-generated.

Effector CD8+ T cells gain stem-like traits through a redox-driven metabolic program. This process involves NQO1, the pentose phosphate pathway, and mitochondrial remodeling for lasting antitumor immunity.

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Area of Science:

  • Immunology
  • Metabolism
  • Cell Biology

Background:

  • Effector CD8+ T cells are crucial for adaptive immunity and cancer control.
  • Understanding how these cells acquire durable, stem-like properties is key to enhancing immunotherapy.
  • Metabolic reprogramming plays a significant role in T cell function and memory formation.

Purpose of the Study:

  • To investigate the metabolic mechanisms underlying the acquisition of stem-like durability in effector CD8+ T cells.
  • To identify key molecular players and pathways involved in this process.
  • To link metabolic changes to sustained antitumor immunity.

Main Methods:

  • Utilized a combination of metabolic assays and cellular analysis techniques.
  • Investigated the role of specific enzymes, such as NQO1, in T cell metabolism.
  • Assessed the impact of metabolic reprogramming on T cell function and antitumor responses in vivo.

Main Results:

  • Discovered a redox-driven metabolic program essential for effector CD8+ T cell stemness.
  • Demonstrated that NQO1-mediated cycling of lawsone enhances the pentose phosphate pathway.
  • Showed that this program remodels mitochondrial function, promoting sustained effector T cell function and antitumor immunity.

Conclusions:

  • A specific metabolic program, driven by redox processes and involving NQO1, is critical for effector CD8+ T cell stem-like durability.
  • This metabolic reprogramming directly links effector differentiation to the maintenance of long-lasting antitumor immunity.
  • Targeting this pathway may offer novel strategies for improving cancer immunotherapies.