Natural killer cell therapy targeting cancer stem cells: Old wine in a new bottle

Area of Science:

• Oncology
• Immunology
• Cancer Stem Cell Biology

Background:

• Cancer stem cells (CSCs) possess stem cell-like properties, driving tumor growth and poor prognosis.
• CSCs are inherently resistant to traditional treatments like chemotherapy and radiotherapy.
• Targeting CSCs is crucial for improving cancer therapy efficacy.

Purpose of the Study:

• To review and discuss strategies for enhancing natural killer (NK) cell therapy against CSCs.
• To identify CSC-specific immune evasion mechanisms during NK cell therapy.
• To provide a reference for future research on optimizing NK cell function for CSC eradication.

Main Methods:

• Review of existing literature on cancer stem cells, immunotherapy, and NK cell biology.
• Analysis of CSC immune evasion strategies in the context of NK cell interactions.
• Synthesis of promising approaches to improve NK cell-mediated anti-CSC activity.

Main Results:

• NK cells show potent anti-CSC capabilities, particularly against tumors with low MHC class I expression.
• CSCs employ specific mechanisms to evade NK cell-mediated killing.
• Various strategies can be employed to overcome CSC resistance and enhance NK cell efficacy.

Conclusions:

• Optimizing NK cell therapy requires understanding and overcoming CSC immune evasion tactics.
• Developing novel strategies to boost NK cell function is essential for effective CSC targeting.
• This review highlights potential avenues for advancing NK cell-based cancer immunotherapy.