ERK2 IN-1 is a selective ERK2 inhibitor with an IC50 of 7 nM.

CHIR-99021 HCl (Laduviglusib HCl) is a highly potent and selective inhibitor of GSK-3α/β, with IC50 values of 10 nM and 6.7 nM respectively. It demonstrates remarkable selectivity for GSK-3, with over 500-fold selectivity over CDC2, ERK2, and other protein kinases. Additionally, CHIR-99021 HCl serves as a robust activator of the Wnt/β-catenin signaling pathway. Moreover, it exhibits the ability to enhance self-renewal in both mouse and human embryonic stem cells. Furthermore, CHIR-99021 HCl induces autophagy [1] [2] [3].

ERK-IN-2, an ERK2 inhibitor, exhibits an IC50 value of 1.8 nM. At doses greater than 10 μM, it may induce off-target toxicity and/or activity [1].

Prosaptide Tx14(A) TFA is a prosaposin-derived peptide and a potent agonist of both GPR37L1 and GPR37, exhibiting EC50 values of 5 nM and 7 nM, respectively. In Schwann cells, this compound enhances phosphorylation of both ERK1 and ERK2 [1] [2].

E6201 (ER-806201) is a potent dual kinase inhibitor targeting MEK1 and FLT3, inhibiting their activities in an ATP-competitive manner. It effectively suppresses MEK1-induced ERK2 phosphorylation (IC50 = 5.2 nM), MKK4-induced JNK phosphorylation (IC50 = 91 nM), and MKK6-induced p38 MAPK phosphorylation (IC50 = 19 nM). E6201 exhibits anti-tumor and anti-psoriasis effects [1] [2].

1. Corynoxeine is a potent ERK1/2 inhibitor of key PDGF-BB-induced VSMC proliferation and may be useful in the prevention and treatment of vascular diseases and restenosis after angioplasty.

ADTL-EI1712 is a dual inhibitor of ERK1 and ERK5 (IC50s = 40.43 and 64.5 nM, respectively).1It reduces ERK1 and ERK5 activity by 93.5% and 89.4%, respectively, but also inhibits ERK2 activity by 92.7%, in a panel of 100 kinases at 1 μM. ADTL-EI1712 inhibits proliferation of HL-60 and MKN74, but not HeLa, cancer cells (IC50s = 1.26, 2.55, and >50 μM, respectively). It reduces tumor growth and intratumor phosphorylation of ERK1/2 and ERK5 in an MKN74 mouse xenograft model when administered at a dose of 50 mg/kg per day. 1.Wang, G., Zhao, Y., Liu, Y., et al.Discovery of a novel dual-target inhibitor of ERK1 and ERK5 that induces regulated cell death to overcome compensatory mechanism in specific tumor typesJ. Med. Chem.63(8)3976-3995(2020)

MEK1 Derived Peptide Inhibitor 1, a peptide inhibitor, prevents the in vitro activation of ERK2 by MEK1, exhibiting an inhibitory concentration (IC 50) of 30 μM. It is utilized in the study of cell-permeable [1].