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SP 600125

Catalog No.: GC15344

JNK1/2/3 inhibitor

SP 600125 Chemical Structure

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10mM (in 1mL DMSO)
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Sample solution is provided at 25 µL, 10mM.

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Cell experiment: [1]

Cell lines

MIN6 cells

Preparation method

The solubility of this compound in DMSO is >10 mM. General tips for obtaining a higher concentration: Please warm the tube at 37 °C for 10 minutes and/or shake it in the ultrasonic bath for a while.Stock solution can be stored below -20°C for several months.

Reaction Conditions

40 μM, 36 hours


When the MIN6 cells were transfected with the Gal4 plasmid and CREB plasmid, SP600125 significantly stimulated CREB-mediated promoter activity in a dose-dependent manner. There was a 2.8-fold increase in this reporter activity after exposure of the transfected MIN6 cells to 20 μM of the inhibitor.

Animal experiment: [2]

Animal models

Female C57BL/6 mice

Dosage form

Subcutaneous injection; 15 mg/kg; administered at 0, 12, 24, and 36 h


Anti-CD3 (50 μg) i.p. was administered as a single dose immediately after SP600125 at time 0. After 48 h, mice were killed, and the thymus was dissected for thymocyte isolation. Mice receiving SP600125 showed almost complete resistance to CD3 Ab-mediated apoptosis with CD4+CD8+ numbers the same as control animals.

Other notes

Please test the solubility of all compounds indoor, and the actual solubility may slightly differ with the theoretical value. This is caused by an experimental system error and it is normal.


[1] Vaishnav D, Jambal P, Reusch J E B, et al. SP600125, an inhibitor of c-jun N-terminal kinase, activates CREB by a p38 MAPK-mediated pathway. Biochemical and biophysical research communications, 2003, 307(4): 855-860.

[2] Bennett B L, Sasaki D T, Murray B W, et al. SP600125, an anthrapyrazolone inhibitor of Jun N-terminal kinase. Proceedings of the National Academy of Sciences, 2001, 98(24): 13681-13686.


SP600125 is a selective, reversible and ATP-competitive inhibitor of Jun N-terminal kinase (JNK) with IC50 values of 40, 40 and 90 nM for JNK1, 2 and 3, respectively [1].

SP600125 was screened out from a time-resolved f luorescence assay using the GST-c-Jun and recombinant human JNK2. In this assay, SP600125 showed a Ki value of 190 nM. SP600125 was also found to inhibit JNK1, 2 and 3 isoforms in the selectivity tests. The selectivity of SP600125 for JNK is 300-fold greater than that for ERK1 and p38-2. In Jurkat T cells, SP600125 suppressed the phosphorylation of c-Jun with IC50 of 5-10 μM. SP600125 also inhibited the expression of IL-2 and IFN-γ in cells stimulated with PMA and phytohemagglutinin, since JNK had been reported to regulate the transcription of IL-2. Besides that, SP600125 exerted differential inhibition of cytokines in CD4+ cells as well as inflammatory genes in monocytes. Moreover, SP600125 administration significantly inhibited TNF-α expression induced by LPS in a mouse model, suggesting that it had efficacy in endotoxin-induced inf lammation in vivo [1].

[1] Bennett B L, Sasaki D T, Murray B W, et al. SP600125, an anthrapyrazolone inhibitor of Jun N-terminal kinase. Proceedings of the National Academy of Sciences, 2001, 98(24): 13681-13686.

Chemical Properties

Cas No. 129-56-6 SDF
Chemical Name dibenzo[cd,g]indazol-6(2H)-one
Canonical SMILES O=C1C2=CC=CC3=C2C(C4=CC=CC=C41)=NN3
Formula C14H8N2O M.Wt 220.23
Solubility ≥ 11mg/mL in DMSO, ≥ 2.56 mg/mL in EtOH with gentle warming Storage Desiccate at -20°C
General tips For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.
Shipping Condition Evaluation sample solution : ship with blue ice
All other available size: ship with RT , or blue ice upon request

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Research Update

Induction of apoptosis and cell cycle arrest by a specific c-Jun NH2-terminal kinase (JNK) inhibitor, SP-600125, in gastrointestinal cancers

The c-Jun NH(2)-terminal kinase (JNK) is activated in several tumor cell lines. The aim of this study was to determine the effects of SP-600125, a specific JNK inhibitor, on the viability, apoptosis, cell cycle distribution of gastrointestinal cancer cells, and the potential anti-tumor mechanisms. Three gastric cancer cell lines, AGS, BCG-823 and MKN-45, and three colorectal cancer cell lines, SW1116, COLO205 and HT-29, were used. Cells were treated with SP-600125, and cell viability, apoptosis and cell cycle distribution, caspase-3 activity, expression of JNK and apoptosis related proteins were detected. SP-600125 inhibited cell proliferation by 10-80% for the different cell lines, and increased apoptosis by 1.5-4.5 folds for COLO205, BCG-823, MKN-45, AGS cells. Caspase-8 and caspase-3 were involved in the induction of apoptosis. SP-600125 caused G2/M cell cycle arrest and elevation of cyclin B1 and p27(kip). The differential response in cells to SP-600125 was associated with the basal level of phosphorylated JNK2. It is concluded that SP-600125 inhibits proliferation, induces apoptosis and causes cell cycle arrest in gastrointestinal cancer cells, indicating that JNK inhibitors have an anti-tumor effect and are potential therapeutic agents for cancers.

Effects of the JNK inhibitor anthra[1,9-cd]pyrazol-6(2H)-one (SP-600125) on soluble guanylyl cyclase alpha1 gene regulation and cGMP synthesis

The decreased expression of the nitric oxide (NO) receptor, soluble guanylyl cyclase (sGC), occurs in response to multiple stimuli in vivo and in cell culture and correlates with various disease states such as hypertension, inflammation, and neurodegenerative disorders. The ability to understand and modulate sGC expression and cGMP levels in any of these conditions could be a valuable therapeutic tool. We demonstrate herein that the c-Jun NH2-terminal kinase JNK II inhibitor anthra[1,9-cd]pyrazol-6(2H)-one (SP-600125) completely blocked the decreased expression of sGCalpha1-subunit mRNA by nerve growth factor (NGF) in PC12 cells. Inhibitors of the ERK and p38 MAPK pathways, PD-98059 and SB-203580, had no effect. SP-600125 also inhibited the NGF-mediated decrease in the expression of sGCalpha1 protein as well as sGC activity in PC12 cells. Other experiments revealed that decreased sGCalpha1 mRNA expression through a cAMP-mediated pathway, using forskolin, was not blocked by SP-600125. We also demonstrate that TNF-alpha/IL-1beta stimulation of rat fetal lung (RFL-6) fibroblast cells resulted in sGCalpha1 mRNA inhibition, which was blocked by SP-600125. Expression of a constitutively active JNKK2-JNK1 fusion protein in RFL-6 cells caused endogenous sGCalpha1 mRNA levels to decrease, while a constitutively active ERK2 protein had no effect. Collectively, these data demonstrate that SP-600125 may influence the intracellular levels of the sGCalpha1-subunit in certain cell types and may implicate a role for c-Jun kinase in the regulation of sGCalpha1 expression.

[Effect of Acupuncture Intervention on c-jun N-terminal Kinase Signaling in the Hippocampus in Rats with Forced Swimming Stress]

Objective: To observe the effect of acupuncture on c-jun N-terminal Kinase (JNK) signaling in the hippocampus in rats with forced-swimming stress, so as to reveal its underlying mechanism in relieving depression-like motor response.
Methods: Forty-eight Sprague-Dawley rats were randomly divided into 8 groups as control, control + JNK inhibitor (SP 600125) , model, model + SP 600125, acupuncture, acupuncture + SP 600125, Fluoxetine (an anti-depressant) , and Fluoxetine + SP 600125 (n = 6 in each group). The depression-like behavior (immobility) model was established by forcing the rat to swim in a glass-cylinder and solitary raise. Acupuncture stimulation was applied to "Baihui" (GV-20) and "Yintang" (GV 29) for 20 min before forced swimming and once again 24 h later.. The rats of the Fluoxetine and Fluoxetine+ SP 600125 groups were treated by intragastric administration of fluoxetine 10 mL (1.8 mg)/kg before forced swimming and once again 24 h thereafter. The rats of the model + SP 600125 and acupuncture + SP 600125 groups were treated by intraperitoneal injection of SP 600125 (10 mg/kg) 90 min before forced swimming and 30 min before acupuncture intervention, respectively. The immobility duration of rats in the water glass-cylinder was used to assess their depression-like behavior response. The expression levels of protein kinase kinase 4 (MKK 4), MKK 7, JNK, and phosphorylated JNK (p-JNK) in the hippocampus were detected by Western blot.
Results: Compared to the control group, the duration of immobility, and the expression levels of hippocampal MKK 4, MKK 7, and p-JNK proteins were significantly increased in the model group (P < 0.01). While in comparison with the model group, the duration of immobility in the model + SP 600125, acupuncture, acupuncture + SP 600125, Fluoxetine and Fluoxetine + SP 600125 groups, the expression levels of hippocampal MKK 4 and MKK 7 proteins in the Fluoxetine + SP 600125 group, and those of p-JNK protein in the acupuncture, acupuncture + SP 600125, model + SP 600125, Fluoxetine and Fluoxetine + SP 600125 groups were considerably decreased (P < 0.05, P < 0.01). No significant differences were found between the control and control + SP 600125 groups and among the model + SP 600125, acupuncture, acupuncture + SP 600125, Fluoxetine and Fluoxetine + SP 600125 groups in the duration of immobility (P > 0.05), and in the expression level of p-JNK protein (P > 0.05). No significant changes were found in the expression levels of JNK among the 8 groups (P > 0.05).
Conclusion: Acupuncture stimulation of GV 20 and GV 29 is effective in relieving depression-like motor response in forced-swimming stress rats, which may be closely associated with its effects in down-regulating the expression of hippocampal p-JNK protein.

c-Jun N-Terminal Kinase Signaling Inhibitors Under Development

Targeting protein kinases has been active area in drug discovery. The c-Jun N-terminal kinases (JNKs) have also been target for development of novel therapy in various diseases, since the roles of JNK signaling in pathological conditions were revealed in studies using jnk-deficient mice. Small molecule inhibitors and peptide inhibitors are identified for therapeutic intervention of JNK signaling pathway. SP-600125, an anthrapyrazole small molecule inhibitor for JNK with high potency and selectivity has been widely used for dissecting JNK signaling pathway. CC-401 is the first JNK inhibitor that went into clinical trial for inflammation and leukemia. Inhibitor for mixed lineage kinase (MLK), CEP-1347 also negatively regulates JNK signaling, and tried for potential use in Parkinson's disease. Cell-permeable peptide inhibitor D-JNKI-1 is being developed for the treatment of hearing loss. The current status of these JNK inhibitors and safety issue is discussed in the minireview.

ROS generation is involved in titanium dioxide nanoparticle-induced AP-1 activation through p38 MAPK and ERK pathways in JB6 cells

Titanium dioxide (TiO2 ) is generally regarded as a nontoxic and nongenotoxic white mineral, which is mainly applied in the manufacture of paper, paint, plastic, sunscreen lotion and other products. Recently, TiO2 nanoparticles (TiO2 NPs) have been demonstrated to cause chronic inflammation and lung tumor formation in rats, which may be associated with the particle size of TiO2 . Considering the important role of activator protein-1 (AP-1) in regulating multiple genes involved in the cell proliferation and inflammation and the induction of neoplastic transformation, we aimed to evaluate the potency of TiO2 NPs (≤ 20 nm) on the activation of AP-1 signaling pathway and the generation of reactive oxygen species (ROS) in a mouse epidermal cell line, JB6 cells. MTT, electron spin resonance (ESR), AP-1 luciferase activity assay in vitro and in vivo, and Western blotting assay were used to clarify this problem. Our results indicated that TiO2 NPs dose-dependently caused the hydroxyl radical (·OH) generation and sequentially increased the AP-1 activity in JB6 cells. Using AP-1-luciferase reporter transgenic mice models, an obvious increased AP-1 activity was detected in dermal tissue after exposure to TiO2 NPs for 24 h. Interestingly, TiO2 NPs increased the AP-1 activity via stimulating the expression of mitogen-activated protein kinases (MAPKs) family members, including extracellular signal-regulated protein kinases (ERKs), p38 kinase, and C-Jun N-terminal kinases (JNKs). Of note, the AP-1 activation induced by TiO2 NPs could be blocked by specific inhibitors (SB203580, PD98059, and SP 600125, respectively) that inhibit ERKs and p38 kinase but not JNKs. These findings indicate that ROS generation is involved in TiO2 NPs-induced AP-1 activation mediated by MAPKs signal pathway.


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Average Rating: 5 ★★★★★ (Based on Reviews and 14 reference(s) in Google Scholar.)

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