NF-κB, AKT and PD-L1 expressions in multiple compensative experiments. NF-κB p65, p-NF-κB p65, AKT, p-AKT, PD-L1 expressions among groups in U-87 MG cells (A) and U-251 MG cells (B). AKIP1, A-kinase-interacting protein 1; NC, negative control; CXCL, C-X-C motif chemokine ligand.