Related Experiment Video
Updated: Oct 9, 2025
Quantifying Antibody-Dependent Cellular Cytotoxicity in a Tumor Spheroid Model: Application for Drug Discovery
Published on: April 26, 2024
Facile discovery of a therapeutic agent for NK-mediated synergistic antitumor effects using a patient-derived 3D
Young Eun Lee1,2, Chae Min Yuk1, Minseok Lee3
1Theragnosis Research Center, Biomedical Research Division, Korea Institute of Science and Technology, Seongbuk-Gu, Seoul 02792, Republic of Korea. mihue@kist.re.kr.
Abstract:
Despite the essential roles of natural killer (NK) cells in cancer treatment, the physical barrier and biological cues of the tumor microenvironment (TME) may induce NK cell dysfunction, causing their poor infiltration into tumors. The currently available two-dimensional (2D) cancer-NK co-culture systems hardly represent the characteristics of TME and are not suitable for tracking the infiltration of immune cells and assessing the efficacy of immunotherapy. This study aims to monitor NK-mediated cancer cell killing using a polymer thin film-based, 3D assay platform that contains highly tumorigenic cancer spheroids. A poly(cyclohexyl methacrylate) (pCHMA)-coated surface enables the generation of tumorigenic spheroids from pancreatic cancer patient-derived cancer cells, showing considerable amounts of extracellular matrix (ECM) proteins and cancer stem cell (CSC)-like characteristics. The 3D spheroid-based assay platform allows rapid discovery of a therapeutic agent for synergistic NK-mediated cytotoxicity through imaging-based high-content screening. In detail, the small molecule C19, known as a multi-epithelial-mesenchymal transition pathway inhibitor, is shown to enhance NK activation and infiltration via modulation of the ECM, resulting in synergistic cytotoxicity against cancer spheroids. This 3D biomimetic co-culture assay platform provides promising applications for predicting patient-specific responses to immunotherapy through advanced therapeutic combinations involving a chemical drug and immune cells.
Insights
A new 3D platform models the tumor microenvironment (TME) to study natural killer (NK) cell cancer therapy. It identified a compound that enhances NK cell activity and infiltration for improved cancer treatment.
Area of Science:
- Immunology
- Biomaterials Science
- Cancer Research
Background:
- Natural killer (NK) cells are crucial for cancer treatment, but the tumor microenvironment (TME) often impairs their function and infiltration.
- Traditional 2D co-culture systems fail to accurately mimic the TME, limiting their utility in evaluating immunotherapies.
Purpose of the Study:
- To develop and validate a 3D biomimetic assay platform for monitoring NK cell-mediated cancer killing.
- To identify therapeutic agents that enhance NK cell activity and infiltration within a 3D tumor model.
Main Methods:
- Utilized a poly(cyclohexyl methacrylate) (pCHMA)-coated surface to generate tumorigenic pancreatic cancer spheroids from patient-derived cells.
- Employed a 3D spheroid-based assay for high-content screening of therapeutic agents targeting NK cell-cancer interactions.
- Assessed NK cell activation, infiltration, and cytotoxicity against cancer spheroids.
Main Results:
- The 3D platform successfully generated tumorigenic spheroids with extracellular matrix (ECM) proteins and cancer stem cell (CSC)-like properties.
- The small molecule C19, an epithelial-mesenchymal transition inhibitor, enhanced NK cell activation and ECM modulation.
- C19 demonstrated synergistic cytotoxicity against cancer spheroids by improving NK cell infiltration.
Conclusions:
- The developed 3D biomimetic co-culture assay platform effectively models TME challenges for NK cell immunotherapy.
- This platform facilitates the discovery of novel therapeutic strategies, such as combining C19 with NK cells, for enhanced cancer treatment.
- The assay holds promise for predicting patient-specific responses to combination immunotherapies.
