GBM with chemotherapy treatment GABPB1 and -B1-L levels are downregulated (GABPB1: mean = 0.308, 95% CI = 0.16–0.45, p = 0.001 and -B1-L: mean = 0.464, 95% CI = 0.1–0.81, p = 0.035) as to sec. The gene discussed is GABPB1; the disease is glioblastoma.