KLRK1 and glioblastoma: To further confirm that the NKG2D BiTE could target GSCs, cells obtained from primary human GBM surgical aspirate were dissociated and cultured either in a normal medium containing serum (RPMI with 10% FCS) or GSC-promoting conditions (NBM) and infected with G207-NKG2D BiTE or G207-Control BiTE virus and co-cultured with healthy donor PBMC-derived T cells.