CGP 57380 is a potent MNK1 inhibitor with IC50 of 2.2 μM, exhibiting no inhibitory activity on p38, JNK1, ERK1 and -2, PKC, or c-Src-like kinases.
PC-3 cells were seeded in 6-well plates. On the next day, cells were treated with the indicated concentrations of 3-AWA, LY294002, CGP57380 or Rapamycin alone and or combination for 12 h. The cells were then subjected to preparation of whole-cell lysates for detection of the indicated proteins using western blotting. The western blots are the representative of three similar experiments.
eFT-508 (eFT508) is a potent and selective MNK1/2 inhibitor with IC50s of 2.4 nM and 1 nM, respectively. It potentially results in decreased tumor cell proliferation and tumor growth.