CD274 and glioblastoma: (B) Quantified CD154 and PD-1 expressions (normalized to untreated) on allogeneic CD8+ T-cell, and PD-L1 expression (normalized to untreated) on GBM cells of PN (GBML20), CL (GBML08) and MES (GBML91) subtypes, showing higher expressions of PD-1 and PD-L1 in the MES GBM niche as compared to the PN and CL GBM niches.