NFKB1 and glioblastoma: The main purpose of this study was to investigate the effects of imipramine on apoptotic signalling and ERK/NF‐κB–mediated glioblastoma progression by using cell proliferation (3‐(4,5‐Dimethylthiazol‐2‐yl)‐2,5‐diphenyltetrazolium bromide [MTT] assay), flow cytometry, Western blotting, and cell invasion/migration assay analysis in vitro.