Potent cellular inhibition of group I PAK substrate phosphorylation (MEK1-S298 and CRAF-S338) was observed at 2.5 to 5 μM concentrations of FRAX1036 in PAK1-amplified MDA-MB-175 cells. Treatment of PAK1-amplified breast cancer cells with FRAX1036 results in apoptosis. And treatment of OVCAR-3 cells with FRAX-1036 results in upregulation of p53 and p21, while down-regulating cyclin B1.
In vivo
Treatment with Frax1036 results in slower KT21 tumor growth and is unlikely to have significant blood brain barrier permeability in mice.