Then, we assessed BCL2 protein levels in SV40-immoralized microglial cells (HMC3) and in the medulloblastoma cell lines ONS76 (SHH), DAOY (SHH with a P53 mutation mimicking Group 3 tumor outcomes), and HDMB03 (Group 3 tumor). This evidence concerns the gene TP53 and medulloblastoma.