XL147(CAS: 934526-89-3 (or 956958-53-5) is a potent, orally bioavailable inhibitor of the class I PI3K family of lipid kinases with IC50 values of 39 nM/383 nM/36 nM/23 nM for PI3Kα/β/δ/γ, respectively; less potent to PI3Kβ. XL147 reversibly binds to class 1 PI3Ks in an ATP-competitive manner, inhibiting the production of the secondary messenger phosphatidylinositol-3,4,5-trisphosphate (PIP3) and activation of the PI3K signaling pathway; this may result in inhibition of tumor cell growth and survival in susceptible tumor cell populations. Activation of the PI3K signaling pathway is frequently associated with tumorigenesis. Dysregulated PI3K signaling may contribute to tumor resistance to a variety of antineoplastic agents including genotoxic agents and receptor tyrosine kinase inhibitors.
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TGF-beta/Smad
PTEN
