The goal of this study is to compare gene expression profiles of PTEN WT and KO GBM cells when they are growing in vivo. Isogenic PTEN WT or KO LN229 GBM cells were subcutaneously implanted into Balb/c nude mice (two in each group) to form tumor. At the 30th day tumors were harvested and total RNA was isolated. RNA-seq analysis was performed to examine the differential express pattern of the two type of xenografts. Overall design: Xenograft GBM tumor mRNA profiles of PTEN wild type (WT) and KO were generated by deep sequencing, in triplicate, using BGISEQ-500.