OXA-11 is a potent, novel small-molecule amino pyrimidine inhibitor (1.2 pM biochemical IC(50)) of focal adhesion kinase (FAK). OXA-11 inhibited FAK phosphorylation at phospho-tyrosine 397 with a mechanistic IC(50) of 1 nM in TOV21G tumor cells, which translated into functional suppression of proliferation in 3-dimensional culture with an EC(50) of 9 nM. Studies of OXA-11 activity in TOV21G tumor-cell xenografts in mice revealed a pharmacodynamic EC(50) of 1.8 nM, indicative of mechanistic inhibition of pFAK [Y397] in these tumors. OXA-11 slows tumor growth, potentiates the anti-tumor actions of cisplatin and--when combined with VEGFR-2 blockade--reduces metastasis of pancreatic neuroendocrine tumors in RIP-Tag2 mice.
FAK-IN-16 (compound OXA-11) is an orally active, selective focal adhesion kinase (FAK) inhibitor with an IC50 of 1.2 pM. FAK-IN-16 inhibits FAK phosphorylation at pFAK[Y397] and pFAK[Y861]. FAK-IN-16 slows tumor growth and reduces tumor vascularity, invasion. FAK-IN-16 potentiates effects of Cisplatin (HY-17394) on tumor cell proliferation and apoptosis in vitro and anti-tumor actions in mice[1].
