PCNA and glioblastoma: To provide insights into the cellular mechanisms related to DNA repair and cell proliferation (Figure 3) in response to different platinum compounds in GBM cells with different genomic landscapes, the expression of Proliferating Cell Nuclear Antigen (PCNA), PARP1 (in double immunofluorescence with apoptosis‐inducing factor [AIF], see Figure 4), and BAP1 (in double immunofluorescence with glutathione peroxidase 4 [GPX4], see Figure 5) was evaluated.