GAPDH and glioblastoma: The Kaplan-Meier survival curve showed that the overall survival time of patients in PATZ1 low expression group was significantly shorter than that in PATZ1 high expression group (Figure 1(a)); western blot assay was used to investigate the PATZ1 expression of glioblastoma cell lines LN229, U87MG, U373, U343, and U118-MG; GAPDH was used as an internal reference.