As shown in Figures 2(b) and 2(c), the viability of U87 glioblastoma cells treated with 5 and 10 μM PLAB for 24 h was significantly lower (74.7 ± 1.83 and 56.87 ± 3.47 versus 97.77 ± 1.45 in control group, P < 0.05). The gene discussed is GDF15; the disease is glioblastoma.