PF-4989216

PF-4989216 is a potent and selective PI3K inhibitor with IC50 of 2 nM, 142 nM, 65 nM, 1 nM, and 110 nM for p110α, p110β, p110γ, p110δ, and VPS34, respectively. PF-4989216 is a novel potent and selective PI3K inhibitor. PF-4989216 inhibits the phosphorylation of PI3K downstream molecules and subsequently leads to inhibition in cell proliferation and xenograft tumor growth in NSCLCs harboring a PIK3CA mutation, including an erlotinib resistant line, NCI-H1975. PF-4989216 inhibited PI3K downstream signaling and subsequently led to apoptosis induction, and inhibition in cell viability, transformation, and xenograft tumor growth in SCLCs harboring PIK3CA mutation.