AIF1 and glioblastoma: In agreement with our previous report that described the interaction and internalization of GO by macrophages and microglia (IBA1+ cells) within the U87 GBM microenvironment,[27, 38] we further observed a strong IBA1+ signal at the initial injection site at 4 h which appeared to undergo redistribution alongside the spread of the nanomaterial (Figure 1C).