Unlike the U373 MG cell line, p53-mediated apoptosis after irradiation was one of the critical mechanisms of tumor cell death at 6 h after irradiation (apoptotic process; GO: 0006915; P = 1.97E-08; FDR Q = 2.01E-05; OR, 4.341 and TP53 Regulates Transcription of Cell Death Genes; R-HSA-5633008; P = 1.43E-05; FDR Q = 0.012). This evidence concerns the gene TP53 and neoplasm.