IFNG and glioblastoma: Correspondingly, the killing capacity of resting microglia against U87MG GBM cells was increased by overnight activation with IFN-γ and against target pre-incubated with mAb9.2.27 compared to the cytotoxicity of resting microglia with IgG2a isotype control (IC) (One-Way ANOVA, p<0.05, n=5 and p<0.05, n=4 respectively), (Fig. 5B).