Cat. No. 1571
Alternative Names: Elatericin B, JSI 124
Chemical Name: (9β,10α,16α,23E)-2,16,20,25-Tetrahydro
Biological ActivitySelective inhibitor of STAT3/JAK2 signaling. Inhibits the activation of STAT3 and JAK2 and displays no activity on Src, Akt, ERK and JNK. Suppresses phosphotyrosine levels of STAT3, inhibits STAT3 DNA binding and STAT3-mediated gene expression. Induces apoptosis in cell lines expressing constitutively active tyrosine-phosphorylated STAT3.
The technical data provided above is for guidance only. For batch specific data refer to the Certificate of Analysis.
All Tocris products are intended for laboratory research use only.
Certificate of Analysis / Product Datasheet / Safety Data Sheet
Dziennis et al (2007) Role of signal transducer and activator of transcription-3 in estradiol-mediated neuroprotection. J.Neurosci. 27 7268. PMID: 17611279.
Nefedova et al (2005) Regulation of dendritic cell differentiation and antitumor immune response in cancer by pharmacologic-selective inhibition of the janus-activated kinase 2/signal transducers and activators of transcription 3 pathway. Cancer Res. 65 9525. PMID: 16230418.
Blaskovich et al (2003) Discovery of JSI-124 (cucurbitacin I), a selective janus kinase/signal transducer and activator of transcription 3 signaling pathway inhibitor with potent antitumor activity against human and murine cancer cells in mice. Cancer Res. 63 1270. PMID: 12649187.
If you know of a relevant reference for this product please let us know.
Citations are publications that use Tocris products. Selected citations for Cucurbitacin I include:
Rogers and Gahring (2015) Upregulation of Nicotinic Acetylcholine Receptor α4+β2 through a Ligand-Independent PI3Kβ Mechanism That Is Enhanced by TNFα and the Jak2/p38Mapk Pathways. Cell Rep 10 e0143319. PMID: 26619345.
Wan et al (2014) Retinal injury, growth factors, and cytokines converge on β-catenin and pStat3 signaling to stimulate retina regeneration. J Neurosci 9 285. PMID: 25263555.
Stechishin et al (2013) On-target JAK2/STAT3 inhibition slows disease progression in orthotopic xenografts of human glioblastoma brain tumor stem cells. Neuro Oncol 15 198. PMID: 23262510.
Hamilton et al (2011) Cytokine induction of tumor necrosis factor receptor 2 is mediated by STAT3 in colon cancer cells. Mol Cancer Res 9 1718. PMID: 21994466.
View Related Products by Product Action
Keywords: Cucurbitacin I, supplier, Selective, inhibitors, inhibits, STAT3/JAK2, signaling, signalling, Janus, Activated, Kinase, JAK, Kinases, Signal, Transducers, activators, Transcription, STAT, CucurbitacinI, ElatericinB, JSI124, Tocris Bioscience, JAK Inhibitor products
Find multiple products by catalog number
New Products in this Area
Potent and selective allosteric activator of AMPKPerifosine
PKB/Akt inhibitor; also modulates Kv2.1 currentRAF 265
Raf kinase and VEGFR-2 inhibitorCZC 25146
Potent LRRK2 inhibitorRo 3280
Potent and selective PLK1 inhibitorRMM 46
MSK/RSK family kinase inhibitorLTURM 34
Potent DNA-PK inhibitorMLi-2
Potent and selective LRRK2 inhibitorLTURM 36
PI 3-kinase δ inhibitorPI 3065
Potent and selective PI 3-kinase p110δ inhibitorAZ PFKFB3 67
Potent and selective PFKFB3 inhibitorSTOCK2S 26016
Lysine deficient protein kinase (WNK) signaling inhibitorrac-CCT 250863
Potent Nek2 inhibitorRoscovitine
Potent, selective cyclin-dependent kinase inhibitorEnzastaurin
Potent PKCβ inhibitorBMS 265246
Potent cdk1/2 inhibitorAutocamtide-2-related inhibitory peptide, myristoylated
CaM kinase II inhibitor; enhanced cell permeable derivative of Autocamtide-2-related inhibitory peptideMP A08
Selective ATP competitive SphK1 and 2 inhibitor; cell permeable
One Day Symposium
March 1, 2017
Amsterdam, The Netherlands