Natural killer cells and engagers: Powerful weapons against cancer

Area of Science:

• Immunology
• Cancer Biology
• Cell Therapy

Background:

• Natural killer (NK) cells are crucial innate immune cells that eliminate virus-infected or tumor cells.
• Their cytotoxic functions are mediated by various receptors, recognizing self-molecules or danger signals.
• NK cells are promising candidates for cancer immunotherapy due to their potent anti-tumor activity.

Purpose of the Study:

• To explore strategies for enhancing NK cell activity in cancer immunotherapy.
• To investigate the role of antibody-based NK cell engagers (NKCEs) in cancer therapy.
• To understand the complexity of NK cell subsets, including memory-like phenotypes, for optimizing immunotherapy design.

Main Methods:

• Review of current strategies to enhance NK cell activity, including cytokine administration and immune checkpoint blockade.
• Focus on antibody-based NK cell engagers (NKCEs) as a cutting-edge approach.
• Discussion of two main strategies: activating autologous NK cells versus adoptive transfer of ex vivo-activated NK cells.

Main Results:

• NKCEs strengthen NK-to-target cell interactions and optimize tumor killing.
• NKCEs show potential in overcoming the immunosuppressive tumor microenvironment.
• NKCEs may also activate γδ T cells, suggesting synergistic effects in immunotherapy.

Conclusions:

• NKCEs represent a promising advancement in cancer immunotherapy by enhancing NK cell-mediated tumor destruction.
• Further exploration of NK cell subsets and their interactions is crucial for refining NKCE-based therapies.
• The potential synergistic effects with other immune cells like γδ T cells warrant further investigation for combination immunotherapies.