IL1B and glioblastoma: We analyzed the TCGA data set [2] for relative IL1β mRNA expression in human GBM subgroups (Fig. 4C), as our murine tumors strongly resemble the human Proneural GBM subtype, and found that the Proneural group with high IL1β expression showed significant survival differences compared to patients with Proneural tumors with low IL1β expression (Fig. 4D).