NCIt definition : Any substance that inhibits phosphatidylinositol 3-kinase (phosphatidylinositide 3-kinase),
an enzyme that catalyzes the phosphorylation of the 3 position hydroxyl group of the
inositol ring of phosphatidylinositol and functions as an intracellular signal transducer
in cell growth, proliferation, differentiation, motility, survival and intracellular
trafficking. Inhibition of phosphatidylinositol 3-kinase produces antiproliferative
and antiangiogenic effects.;