The activated and inhibited NK marker expression (NKG2D, NKp30, FASL, TRAIL, DNAM1, PD1, and NKG2A) did not differ among days 0, 7, 14, 21, and 28; similarly, the NK marker expression did not vary between NK-HD and NK-GBM cells. Here, CD226 is linked to glioblastoma.