Assuming you are looking to culture a cancer organoid in the apical chamber of Corning FluoroBlok Cell Culture Inserts and measure immune function, then the answer is most likely.  Although it does not appear much published work has been done in this area, FluoroBlok inserts are a great choice when one is looking to exclude fluorescent signal generated by cells on the apical surface of the membrane.  Even though they are typically used for migration and invasion assays, they may find some use here. It is also possible to combine Corning 96HTS inserts with the Corning spheroid microplate in order to look at immune cell migration/invasion towards the cancer organoid. Corning scientists have done a similar assay with NK92 cells and a lung cancer cell line.
Please find some useful links below:
Video: An In vitro FluoroBlok Tumor Invasion Assay
Webinar: Applications of Corning FluoroBlok Permeable Supports
Review Article: Culture and Assay Systems Used for 3D Cell Culture
Poster: A Novel Spheroid-based Three-dimensional Invasion Model for Evaluating Potentially Anti-tumor Compounds
Application Note: A Novel Three Dimensional Immune Oncology Model for High Throughput Testing of Tumoricidal Capability
Product Information:
FluoroBlok Cell Culture Inserts
Corning FluoroBlok Inserts Frequently Asked Questions