Phosphatidylinositol 3-kinase (PI3K) catalyzes the phosphorylation of the 3' hydroxyl position of PIs to produce PtdIns-(3,4)-P2 and PtdIns-(3,4,5)-P3, important second messengers that modulate the activity of downstream targets Akt and mTOR.1 Aberrant PI3K/Akt is associated with many human cancers. CAY10626 is a potent, dual PI3Kα/mTOR inhibitor with IC50 values of 0.9 and 0.6 nM for the two respective kinases.2 In a tumor cell growth inhibition assay, CAY10626 demonstrates IC50 values of <3 and 13 nM for MDA361 (breast) and PC3 (prostate) cancer cell lines, respectively.2 When administered at 25-50 mg/k to MD361 xenograft mice, phosphorylation of the downstream targets of PI3Kα and mTOR (Akt T308, Akt S473, and S6K) was suppressed, and significant tumor regression was observed.2
1
Rameh, L.E., and Cantley, L.C. The role of phosphoinositide 3-kinase lipid products in cell function. J Biol Chem2748347-8350(1999).
2
Chen, Z., Venkatesan, A.M., Dehnhardt, C.M., et al. Synthesis and SAR of novel 4-morpholinopyrrolopyrimidine derivatives as potent phosphatidylinositol 3-kinase inhibitors. J Med Chem53(8)3169-3182(2010).
Rameh, L.E., and Cantley, L.C. The role of phosphoinositide 3-kinase lipid products in cell function. J Biol Chem2748347-8350(1999).
Chen, Z., Venkatesan, A.M., Dehnhardt, C.M., et al. Synthesis and SAR of novel 4-morpholinopyrrolopyrimidine derivatives as potent phosphatidylinositol 3-kinase inhibitors. J Med Chem53(8)3169-3182(2010).
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