CGP 57380 is a cell-permeable pyrazolo-pyrimidine compound that acts as a selective inhibitor of Mnk1 (IC50 = 2.2 μM) with no inhibitory activity against p38, JNK1, ERK1/2, PKC, or Src-like kinases.

eFT508 is a MKNK1/2 protein inhibitor.

MNK1/2-IN-5 is a potent and selective MNK1/2 inhibitor as a therapeutic agent.

DS12881479 (DS 12881479) is a novel potent, selective inhibitor of MAPK-interacting kinase 1 (Mnk1) with IC50 of 21 nM, stabilizes the autoinhibited state of Mnk1.

ETC-168 (ETC168) is a potent, selective MNK kinase inhibitor with biochemical IC50 of 23 and 43 nM against MNK1 and MNK2, respectively.ETC-168 acts as a MNK2-biased, dual-MNK inhibitor in cells.ETC-168 induced dose-dependent growth suppression and inhibited 50% of cell viability at 5 uM in LPS141 and MESSA, ETC-168 treatment elicited a consistent increase of cells in G0/G1 phase among LPS141, LP6, and MESSA cells in a dose-dependent manner. ETC-168 decreased cells of S and G2/M phases, while no significant induction of sub-G1 cells.Inhibition of MNK1/2 by ETC-168 elevated the expression of MNK1/2 at both transcript and protein levels in soft tissue sarcoma (STS) cells.ETC-168 effectively suppressed both p-4E and cell viability in MESSA cells, but not CGP57380 and eFT508.ETC-168 suppresseed phosphorylation of ribosomal protein S6 (RPS6) in sensitive STS cell, decreased expression of E2F1, FOXM1, and WEE1.Inhibition of MCL1 via S63845 synergizes with ETC-168 against STS cells.