CT45A1 and colorectal carcinoma: Similarly, NK‐92MI cells treated in conditioned medium (CM) from both vec‐ and CT45A1‐expressing CRC cells for 48 h showed reduced cytotoxicity compared to control NK cells (Fig. 2K), but CM from CT45A1‐expressing CRC cells did not further suppress NK cell cytotoxicity compared to that from vector control cells (Fig. 2K).