Related Experiment Video
Updated: Dec 23, 2025
Advances in Human Induced Pluripotent Stem Cell-Derived Chimeric Antigen Receptor-Expressing Natural Killer Cells
Published on: February 14, 2025
Harnessing the Formation of Natural Killer-Tumor Cell Immunological Synapses for Enhanced Therapeutic Effect in Solid
Sooseok Im1, Donghyun Jang2, Gurusamy Saravanakumar2
1School of Interdisciplinary Bioscience and Bioengineering (I-Bio), Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea.
Abstract:
The formation of an immunological synapse (IS) on recognition of a cancer cell is the main mechanism underlying the natural killer (NK)-cell-mediated killing of tumor cells. Herein, an integrative strategy for cancer therapy against solid tumors is reported, in which alterations in the cleft of IS, following the secretion of acidic granular content, are utilized as a trigger for the delivery of chemotherapeutic drugs. NK cells are decorated with the IS-environment-responsive micellar system to ensure the release of the payload when they attack cancer cells. Using this strategy, the immunological cytotoxic killing effect of NK cells against solid tumors is reinforced with the site-specific diffusion of chemotherapeutic agents. Harnessing the intrinsic mechanism for the recognition of abnormal cells and the tumor-homing effect of NK cells limit the adverse systemic effects of chemotherapeutic drugs. This approach may provide a pragmatic platform for the universal and effective utilization of IS formation.
Insights
Natural killer (NK) cells target cancer cells via an immunological synapse (IS). This study uses the IS environment to trigger drug release from NK cells, enhancing cancer therapy and reducing side effects.
Area of Science:
- Immunology
- Oncology
- Biomedical Engineering
Background:
- Natural killer (NK) cells are crucial for innate immunity against cancer.
- NK-cell-mediated tumor killing involves the formation of an immunological synapse (IS).
- Current cancer therapies face challenges with drug delivery and systemic toxicity.
Purpose of the Study:
- To develop an innovative cancer therapy strategy utilizing the immunological synapse (IS).
- To engineer NK cells for targeted delivery of chemotherapeutic drugs to solid tumors.
- To enhance NK cell cytotoxicity and minimize systemic side effects of chemotherapy.
Main Methods:
- NK cells were modified with a micellar drug delivery system responsive to the IS environment.
- The acidic environment within the IS cleft after granular content secretion was used as a trigger.
- The efficacy of drug release and NK cell-mediated killing was evaluated against solid tumor models.
Main Results:
- The micellar system successfully released chemotherapeutic drugs specifically at the IS upon NK cell activation.
- This targeted delivery significantly enhanced the cytotoxic killing of tumor cells by NK cells.
- The strategy demonstrated reduced systemic drug exposure, mitigating adverse effects.
Conclusions:
- This approach leverages the natural IS formation mechanism for targeted cancer drug delivery.
- It offers a promising platform for enhancing the efficacy of NK cell-based cancer immunotherapy.
- The strategy holds potential for universal application in solid tumor treatment.
Related Concept Videos
01:27Tumor Immunotherapy
01:27Cytotoxic T Cells-mediated Immune Response
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...