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Updated: Jun 15, 2025

Analysis of Human T Cell Activity in an Allogeneic Co-Culture Setting of Pre-Treated Tumor Cells
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Analysis of Human T Cell Activity in an Allogeneic Co-Culture Setting of Pre-Treated Tumor Cells

Published on: March 7, 2025

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Tumor-induced natural killer cell dysfunction is a rapid and reversible process uncoupled from the expression of

Kévin Pouxvielh1,2, Marie Marotel1, Annabelle Drouillard1

  • 1CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007 Lyon, France.

Science Advances
|August 28, 2024
PubMed

Insights

Natural killer (NK) cell dysfunction during cancer is reversible. While tumors can induce an exhaustion-like signature, dysfunction only occurs with NK cell activation and can be restored by removing stimulation.

Area of Science:

  • Immunology
  • Cancer Biology
  • Cellular Immunology

Background:

  • Natural killer (NK) cells play a crucial role in anti-tumor immunity.
  • NK cell dysfunction is observed in tumor progression, but the underlying mechanisms are not fully understood.

Purpose of the Study:

  • To investigate the molecular mechanisms of NK cell dysfunction in a mouse lymphoma model.
  • To determine if NK cell dysfunction is a reversible process and its relationship with immune checkpoint proteins (ICPs).

Main Methods:

  • Utilized mouse lymphoma models with and without NK cell activation.
  • Analyzed NK cell phenotype, including the expression of ICPs and reactivity.
  • Assessed the reversibility of NK cell dysfunction by altering stimulation and using interleukin-15.

Main Results:

  • Tumor progression induced type I interferon and an NK cell exhaustion-like signature with ICPs.
  • NK cell dysfunction was observed exclusively in activated NK cells and was temporally dissociated from ICP induction.
  • ICP-positive NK cells showed heightened reactivity, and dysfunction was reversible upon stimulation withdrawal, aided by interleukin-15.

Conclusions:

  • NK cell dysfunction during tumor progression is a dynamic and reversible process.
  • Reversibility of NK cell dysfunction is uncoupled from the expression of immune checkpoint proteins.
  • Interleukin-15 plays a role in restoring NK cell responsiveness.

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