These candidates were not further investigated in vitro, and while it cannot be excluded that the effect of dipyridamole on tumour growth may partially be due to the inhibition of phosphatidylinositol 4,5-bisphosphate 3-kinase, a separate study [71] showed that dipyridamole had no influence on Akt phosphorylation. Here, AKT1 is linked to neoplasm.