Gene expression profiling of phosphoinositide phosphatases in AML. Sequenom MassARRAY quantitative gene expression analysis of phosphoinositide phosphatases in human messenger RNA from 22 AML BM (black dots) samples at diagnosis with >70% blasts present were compared with messenger RNA from 6 normal BM samples (gray triangles). The mean expression level for both AML and normal patient cohorts for each gene is shown. *P < .05; **P < .01.