用于评估 NK 细胞细胞毒性的肺癌类器官系统

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 TGF 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.