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Enhancing a Natural Killer: Modification of NK Cells for Cancer Immunotherapy

Rasa Islam1,2, Aleta Pupovac1, Vera Evtimov1

  • 1Cartherics Pty Ltd., Clayton 3168, Australia.

Cells
|May 5, 2021
PubMed

Insights

Natural killer (NK) cells are crucial for fighting cancer and are a promising adoptive immunotherapy. Enhancing NK cell therapies involves strategies to boost their numbers and effectiveness against tumors.

Area of Science:

  • Immunology
  • Oncology
  • Biotechnology

Background:

  • Natural killer (NK) cells are innate immune lymphocytes with potent anti-cancer activity.
  • NK cells play a vital role in tumor surveillance and are a focus for adoptive immunotherapy.
  • Challenges include overcoming tumor resistance and the immunosuppressive tumor microenvironment.

Purpose of the Study:

  • To review strategies for enhancing NK cell-based cancer immunotherapy.
  • To discuss the development of next-generation, off-the-shelf, stem cell-derived NK cell products.
  • To highlight considerations for NK cell source, genetic modification, and manufacturing.

Main Methods:

  • Utilizing cytokines and synthetic compounds to enhance NK cell proliferation and cytotoxic function.
  • Targeting immune checkpoints to overcome tumor-induced suppression.
  • Engineering NK cells with chimeric antigen receptors (CARs) for cancer specificity and ablating inhibitory receptors.

Main Results:

  • Various strategies are being employed to improve NK cell number, cancer-killing capacity, and tumor microenvironment resistance.
  • Next-generation NK cell therapies aim for 'off-the-shelf' availability and stem cell derivation for unlimited supply.
  • Understanding NK cell biology in specific tumor contexts is key to optimizing modifications and source selection.

Conclusions:

  • Advancements in NK cell biology and manufacturing are paving the way for potent, readily available immunotherapies.
  • Addressing challenges in NK cell sourcing, genetic modification, and scale-up is critical for clinical translation.
  • Enhanced NK cell immunotherapies are poised to become integral to multi-faceted cancer treatment strategies.
Keywords:
allogeneic immunotherapycancernatural killer (NK) cellspluripotent stem cells

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