ATR and glioblastoma: In a recent publication by Majchrzak-Celińska et al. (2022) dealing with the supportive treatment of glioblastoma with ATR, a positive effect of ATR on the viability of A-172 at 25 μM dose, T98G at 50 μM dose and U-138 MG at 25 μM dose brain tumor cells was recorded [10].