Description
SP-600125 (129-56-6) is a selective inhibitor of c-Jun N-terminal kinase (JNK). Reversibly inhibits JNK1,2 and 3 (IC50‘s range from 40-90 nM). >300-fold selectivity for JNK as compared to related MAP kinases. Anti-inflammatory activity. SP-600125 inhibits expression of presenilin-1 and Notch signaling in mouse brain. Cell permeable and active in vivo.
Uses
A broad-spectrum serine/threonine kinase inhibitor of JNK with an IC50 range from 40 to 90 nM.
Definition
ChEBI: A member of the class of anthrapyrazoles that is anthra[1,9-cd]pyrazole substituted at position 6 by an oxo group. An inhibitor of c-Jun N-terminal kinase.
General Description
A potent, cell-permeable, selective, and reversible inhibitor of c-Jun N-terminal kinase (JNK) (IC50 = 40 nM for JNK-1 and JNK-2 and 90 nM for JNK-3). The inhibition is competitive with respect to ATP. Exhibits over 300-fold greater selectivity for JNK as compared to ERK1 and p38-2 MAP kinases. Inhibits the phosphorylation of c-Jun and blocks the expression of IL-2, IFN-γ, TNF-α, and COX-2 in cells. Blocks IL-1-induced accumulation of phospho-Jun and induction of c-Jun transcription.
Biological Activity
Selective inhibitor of c-Jun N-terminal kinase (JNK). Competitively and reversibly inhibits JNK1, 2 and 3 (IC 50 = 40-90 nM) with negligible activity at ERK2, p38 β and a range of enzymes (IC 50 > 10 μ M). Active in vivo . Shown to have reduced selectivity over other protein kinases under certain conditions. Protects renal tubular epithelial cells against ischemia/reperfusion-induced apoptosis. Also available as part of the MAPK Inhibitor Tocriset™ .
Biochem/physiol Actions
SP600125 is an anthrapyrazolone inhibitor of JNK that competes with ATP to inhibit the phosphorylation of c-Jun. It prevents the activation of inflammatory genes such as COX-2, IL-2 IFN-γ and TNF-α.8,9 It prevents the activation of JNK after brain ischemia and may be effective in treatment of ischemic stroke.10
Safety Profile
Poison by intravenous route.When heated to decomposition it emits toxic fumes ofNOx.
Synthesis
1,9-Pyrazolanthrone is prepared by diazotization
of 1-aminoanthraquinone, reaction of the
diazonium salt with sodium hydrogen sulfite,
and cyclization of the resulting hydrazinosulfonic
acid .
storage
-20°C (desiccate)
References
1)Bennett et al. (2001), SP600125, an anthrapyrazolone inhibitor of Jun N-terminal kinase; Proc. Natl. Acad. Sci. USA., 98 13681
2) Rahman et al. (2012), Intraperitoneal injection of JNK-specific inhibitor SP600125 inhibits the expression of presenilin-1 and Notch signaling in mouse brain without induction of apoptosis; Brain Res., 1448 117
