Int J Stem Cells.  2025 Feb;18(1):99-106. 10.15283/ijsc24021.

Lung Cancer Organoid System to Evaluate the Cytotoxicity of Natural Killer Cells

• Oh B
• Kim J
• Kim N
• Jeong Y

• KMID: 2565200
• DOI: http://doi.org/10.15283/ijsc24021

Abstract

Natural killer (NK) cells are gaining growing attention due to their promise for immunotherapy. A fast and accurate system is needed to test NK cell biology and their therapeutic application. Here, we report a lung cancer organoid-based system to evaluate NK cells’ cytotoxicity. We first established the lung cancer organoids on top of Matrigel, which allows the co-culture with NK cells. When co-cultured, NK cells moved close to and inside the lung cancer organoids. When we analyzed by flow cytometry, co-culture of NK cells induced a significantly higher ratio of cell death of lung cancer organoids, suggesting that lung cancer organoids can be employed to test the cytotoxicity of NK cells. Finally, the pre-treatment of NK cells with A83-01, a TGFβ inhibitor, significantly enhanced the cell death of lung cancer organoids by NK cells, indicating that lung cancer organoid-based system faithfully recapitulates cell line-based system in evaluating the in vitro cytotoxicity of NK cells. These data represent that cancer organoid-based NK cell co-culture system is a reliable platform for studying NK cell biology and evaluating their cytotoxicity for screening for NK cell immunotherapy.

Keyword

Organoids; Natural killer cells; Co-culture; Tumor; TGFβ