Rescue experiments in which FKBP9 knockdown cells were infected with Ad-FKBP9 revealed that the decreased proliferation, colony formation and downregulated pro-survival protein levels in FKBP9-depleted GBM cells were a consequence of FKBP9 deficiency (Fig. 2b, c and Additional file 2: Figure S2a, S2b). This evidence concerns the gene FKBP9 and glioblastoma.