Silencing of survivin suppressed tumor cell growth and sensitized cisplatin cytotoxicity in NSCLC Cells. (A) IncuCyte cell proliferation assay on both H596 and H1568 NSCLC cell lines posttreating with EGFRApt/Exo/siSurvivin, EGFRApt/Exo/siCtr, Exo/siSurvivin, and TES buffer in 50 nM of siRNA concentration. n = 3, error bar ± SEM. (B) Cell apoptosis evaluation by Annexin V-positive cells using flow cytometry on both H596 and H1568 NSCLC cell lines posttreating with EGFRApt/Exo/siSurvivin, EGFRApt/Exo/siCtr, Exo/siSurvivin, and TES buffer in 50 nM of siRNA concentration for 48 h followed by 24 h treatment with 5 μM cisplatin, n = 3, *P < 0.05, **P < 0.01, error bar ± SD. Original data and gating refer to Supplementary Fig. S4. (C) Cisplatin-induced apoptosis marker evaluation by western blot on both H596 and H1568 NSCLC cell lines posttreating with EGFRApt/Exo/siSurvivin, EGFRApt/Exo/siCtr,/Exo/siSurvivin, and TES buffer in 50 nM of siRNA concentration for 48 h followed by 24 h treatment with or without 5 μM cisplatin. SD, standard deviation; SEM, standard error of the mean.