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Novel strategies to overcome tumor immunotherapy resistance using CAR NK cells

Jun-Hui Guo1, Ali Afzal2,3, Sadia Ahmad4

  • 1Department of Oncology, The Second Affiliated Hospital of Henan University of Traditional Chinese Medicine, Henan Province Hospital of Traditional Chinese Medicine, Zhengzhou, Henan, China.

Frontiers in Immunology
|June 13, 2025
PubMed

Insights

Chimeric antigen receptor (CAR) natural killer (NK) cells offer new cancer immunotherapy strategies, potentially surpassing CAR T cells by overcoming tumor resistance through enhanced homing and cytotoxic mechanisms.

Area of Science:

  • Immunology
  • Oncology
  • Cell Therapy

Background:

  • Immunotherapy faces challenges, including tumor resistance.
  • Chimeric antigen receptor (CAR) T cells are a current standard but have limitations.
  • Natural killer (NK) cells present an alternative effector for cancer immunotherapy.

Purpose of the Study:

  • To review resistance mechanisms in cancer immunotherapy.
  • To explore engineering strategies for CAR NK cells.
  • To highlight advancements in NK cell homing and migration for improved tumor targeting.

Main Methods:

  • Literature review of preclinical and clinical studies on CAR NK cell therapy.
  • Analysis of NK cell cytotoxic mechanisms and homing capabilities.
  • Examination of gene-editing techniques for CAR NK cell enhancement.

Main Results:

  • CAR NK cells exhibit diverse cytotoxic mechanisms against tumors.
  • Improvements in NK cell homing enhance targeting of tumor sites.
  • Gene-edited CAR NK cells show promise in overcoming immunotherapy resistance.

Conclusions:

  • CAR NK cell therapy is a rapidly emerging and potentially superior alternative to CAR T cells.
  • Enhancing NK cell homing and functionality is key to successful CAR NK therapy.
  • CAR NK cells offer novel strategies for combating tumor immunotherapy resistance.
Keywords:
CAR NK cellsNK cell homingcancer immunotherapyimmunotherapy resistancetumor microenvironment

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