Effect of omipalisib on transcriptome and signaling pathways in leukemic cell line OCI-AML3

To identify molecular effects of the dual PI3K/mTOR inhibitor omipalisib (GSK2126458), we applied gene expression profiling in human leukemic cell lines OCI-AML3 using Whole Transcriptome Shotgun Sequencing (RNA-seq). After OCI-AML3 cell were treated with 50 nM omipalisib for 24 h, differentially expressed genes (DEGs) of 1245 genes upregulated and 811 were downregulated were found compared with vehicle group. Down-regulated genes enriched in cell cycle, DNA metabolic process, PI3K/AKT/mTOR signaling, MYC pathway, E2F pathway, Gly, Ser and Thr metabolism, Cys and Met metabolism, carbon metabolism, oxidative phosphorylation, mitochondrial biogenesis and respiratory electron transporter chain. Gene expression in OCI-AML3 was measured after exposure for 24 h to 50 nM omipalisib (GSK2126458) or to the vehicle control (DMSO).