Catalog Number: 1571
Alternate 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:
  • Formula:
  • Solubility:
    Soluble to 10 mM in DMSO and to 20 mM in ethanol
  • Purity:
  • Storage:
    Store at -20°C
  • CAS No:
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.
Background References
  1. 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.
    Blaskovich et al.
    Cancer Res., 2003;63:1270
  2. 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.
    Nefedova et al.
    Cancer Res., 2005;65:9525
  3. Role of signal transducer and activator of transcription-3 in estradiol-mediated neuroprotection.
    Dziennis et al.
    J.Neurosci., 2007;27:7268
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