Cucurbitacin I

Cat. No. 1571

Cucurbitacin I C30H42O7 [2222-07-3]

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Alternative Names: Elatericin B, JSI 124

Chemical Name: (9β,10α,16α,23E)-2,16,20,25-Tetrahydroxy-9-methyl-19-norlanosta-1,5,23-triene-3,11,22-trione

Biological Activity

Selective 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.

Technical Data

M.Wt:
514.65
Formula:
C30H42O7
Solubility:
Soluble to 10 mM in DMSO and to 20 mM in ethanol
Purity:
>98 %
Storage:
Store at -20°C
CAS No:
2222-07-3

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 / Safety Data Sheet

Certificate of Analysis: View current batch
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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:

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.

Do you know of a great paper that uses Cucurbitacin I from Tocris? If so please let us know.

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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

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