1. MAPK/ERK Pathway
  2. JNK


Cat. No.: HY-12041 Purity: 98.69%
Data Sheet SDS Handling Instructions

SP600125 is a broad-spectrum JNK inhibitor for JNK1, JNK2 and JNK3 with IC50 of 40 nM, 40 nM and 90 nM, respectively.

For research use only. We do not sell to patients.
SP600125 Chemical Structure

SP600125 Chemical Structure

CAS No. : 129-56-6

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Free Sample (0.5-1 mg)   Apply now  
10 mM * 1 mL in DMSO $55 In-stock
10 mg $50 In-stock
50 mg $65 In-stock
100 mg $86 In-stock
200 mg $130 In-stock
500 mg $190 In-stock
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Customer Review

  • Biological Activity

  • Protocol

  • Technical Information

  • Purity & Documentation

  • References


SP600125 is a broad-spectrum JNK inhibitor for JNK1, JNK2 and JNK3 with IC50 of 40 nM, 40 nM and 90 nM, respectively.

IC50 & Target

IC50: 40/40/90 nM (JNK1/2/3)[1]

In Vitro

SP600125 is an ATP-competitive inhibitor of JNK2 with a Ki value of 0.19±0.06 μM. SP600125 inhibits the phosphorylation of c-Jun with IC50 of 5 μM to 10 μM in Jurkat T cells. In CD4+ cells, such as Th0 cells isolated from either human cord or peripheral blood, SP600125 blocks cell activation and differentiation and inhibits the expression of inflammatory genes COX-2, IL-2, IL-10, IFN-γ, and TNF-α, with IC50 of 5 μM to 12 μM[1]. In a mouse beta cells MIN6, SP600125 (20 μM) induces the phosphorylation of p38 MAPK and its downstream CREB-dependent promoter activation[2]. In HCT116 cells, SP600125 (20 μM) blocks the G2 phase to mitosis transition and induces endoreplication. This ability of SP600125 is independent of JNK inhibition, but due to its inhibition of CDK1-cyclin B activation upstream of Aurora A and Polo-like kinase 1[3].

In Vivo

Administration of SP600125 at 15 or 30 mg/kg i.v. significantly inhibits TNF-α serum levels, whereas oral administration dose-dependently blocks TNF-α expression with significant inhibition observed at 30 mg/kg per os[1]. SP600125 attenuates LPS-induced ALI in rats in vivo. The expression levels of TNF-α and IL-6 in the BALF in rats in the SP600125 group are significantly decreased[4].

Preparing Stock Solutions
Concentration Volume (DMSO) Mass 1 mg 5 mg 10 mg
1 mM 4.5407 mL 22.7035 mL 45.4071 mL
5 mM 0.9081 mL 4.5407 mL 9.0814 mL
10 mM 0.4541 mL 2.2704 mL 4.5407 mL
Cell Assay

SP600125 is dissolved in DMSO (20 mM) and stored, and then diluted with appropriate media (DMSO 0.1%) befor use[1].

Determination of mRNA half-life is performed essentially, except that CD14+ cells are stimulated with (bacterial) lipopolysaccharide (LPS; 50 ng/mL) for 2 h before addition of actinomycin D (5 μg/mL). SP600125 (25 μM) or vehicle (0.5% DMSO vol/vol) is added immediately following the actinomycin D. Analysis is performed by using real-time reverse transcription (RT)-PCR. Total RNA is extracted with an RNeasy Mini kit. TNF mRNA is measured by real time RT-PCR, using a TNF Taqman probe. All data are normalized by using glyceraldehyde-3-phosphate dehydrogenase (GAPDH) expression. The TNF-α forward primer is 5′-CTGGCCCAGGCAGTCAGAT-3′ and the reverse primer is 5′-TATCTCTCAGCTCCACGCCATT-3′. The Taqman probe sequence is 5′-FAM-CCTGTAGCCCATGTTGTAGCAAACCCTCA-TAMRA-3′[1]. MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Animal Administration

SP600125 is dissolved in 30% PEG-400/20% polypropylene glycol/15% Cremophor EL/5% ethanol/30% saline (Mice)[1].

Female CD-1 mice (8-10 weeks of age) are dosed i.v. or per oswith SP600125 in PPCES vehicle (30% PEG-400/20% polypropylene glycol/15% Cremophor EL/5% ethanol/30% saline), final volume of 5 mL/kg, 15 min before i.v. injection with LPS in saline (0.5 mg/kg). At 90 min, a terminal bleed is obtained from the abdominal vena cava, and the serum is recovered. Samples are analyzed for mouse TNF-α by using an ELISA.
A total of 40 male Wistar rats are randomly divided into four groups (n=10): the control group, LPS group, normal saline group (NS) and the SP600125 group. Acute lung injury (ALI) is induced via intratracheal injection of LPS. Briefly, the rats are anesthetized with pentobarbital sodium followed by intratracheal injection of 5 mg/kg LPS. The rats are then placed in a vertical position and rotated for 1 min to distribute the LPS in the lungs. Normal saline or SP600125 is administered via intraperitoneal injection (15 mg/kg) 10 min after the LPS injection. MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Molecular Weight






Powder -20°C 3 years
  4°C 2 years
In solvent -80°C 6 months
  -20°C 1 month

Room temperature in continental US; may vary elsewhere

Solvent & Solubility

DMSO: ≥ 45 mg/mL

* "<1 mg/mL" means slightly soluble or insoluble. "≥" means soluble, but saturation unknown.

Purity: 98.69%

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