sp600125

SP600125 (JNK Inhibitor II) is a JNK inhibitor that inhibits JNK1, JNK2, and JNK3 (IC50=40 40 90 nM) with oral potency, reversibility, and ATP-competitive properties. SP600125 inhibits autophagy and induces apoptosis.

High affinity JNK inhibitor (Ki values are 25-50 nM). Inhibits JNK via competitive binding of the ATP-binding site of active, phosphorylated JNK. Exhibits > 40-fold selectivity for JNK over p38, ERK, IKK2, protein kinase C, Lck and ZAP70. Hepatoprotective. Also inhibits HCMV replication. Uehara et al (2004) c-Jun N-terminal kinase mediates hepatic injury after rat liver transplantation. Transplantation. 78 324 PMID:15316358 |Uehara et al (2005) JNK mediates hepatic ischemia reperfusion injury. J.Hepatol. 42 850 PMID:15885356 |Ma et al (2007) A pathogenic role for c-Jun amino-terminal kinase signaling in renal fibrosis and tubular cell apoptosis. J.Am.Soc.Nephrol. 18 472 PMID:17202416 |Ma et al (2009) Blockade of the c-Jun amino terminal kinase prevents crescent formation and halts established anti-GBM glomerulonephritis in the rat. Lab.Invest. 89 470 PMID:19188913 |Zhang et al (2015) The c-Jun N-terminal kinase inhibitor SP600125 inhibits human cytomegalovirus replication. J.Med.Virol. 87 2135 PMID:26058558 |Vasilevskaya et al (2015) Inhibition of JNK sensitizes hypoxic colon cancer cells to DNA-damaging agents. Clin.Cancer.Res. 21 4143 PMID:26023085

JNK-IN-12 (compound P2) is a mitochondrial-targeted JNK inhibitor with an IC50 value of 66.3 nM, consisting of a mitochondrial-specific cell-penetrating peptide linked to SP600125, a selective JNK inhibitor. It selectively impedes mitochondrial JNK phosphorylation without inhibiting nuclear JNK signaling and has shown efficacy in ameliorating Parkinson's disease (PD) symptoms in both in vitro and in vivo studies [1].

JNK-IN-14 is a potent inhibitor of JNK with IC50 values of 1.81 nM for JNK1, 12.7 nM for JNK2, and 10.5 nM for JNK3. It induces early-stage apoptosis, arrests cell population at the G2 M phase, and moderately inhibits beclin-1 production in K562 leukemia cells, demonstrating greater inhibitory efficacy than SP600125. [1]