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Cucurbitacin I

Catalog No. TQ0196   CAS 2222-07-3
Synonyms: JSI-124, NSC-521777, Elatericin B

Cucurbitacin I, a natural compound, is a selective inhibitor of JAK2/STAT3 with anti-cancer activity.

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Cucurbitacin I Chemical Structure
Cucurbitacin I, CAS 2222-07-3
Pack Size Availability Price/USD Quantity
1 mg In stock $ 78.00
5 mg In stock $ 198.00
1 mL * 10 mM (in DMSO) In stock $ 235.00
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Purity: 98.2%
Purity: 96.69%
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Biological Description
Chemical Properties
Storage & Solubility Information
Description Cucurbitacin I, a natural compound, is a selective inhibitor of JAK2/STAT3 with anti-cancer activity.
In vitro The anticancer activity of Cucurbitacin I is accomplished by downregulating p-STAT3 and MMP-9 expression [1]. Incubation of the Seax cell line with the Jak/Stat3 inhibitor Cucurbitacin I result in a time- and concentration-dependent decrease of P-Stat3 and Stat3. Incubation of freshly isolated Sz cells with 30 μM Cucurbitacin I for 6 hours induces apoptosis in the large majority (73-91%) of tumor cells [2]. PE-induced cell enlargement and upregulation of ANF and β-MHC are significantly suppressed by pretreatment of the cardiomyocytes with Cucurbitacin I. Cucurbitacin I also impaired connective tissue growth factor (CTGF) and MAPK signaling, pro-hypertrophic factors, as well as TGF-β/Smad signaling, the important contributing factors to fibrosis [3].
In vivo The differences in tumor volume between the Cucurbitacin I and control, combination and control, and combination and Cucurbitacin I arms are significant. Furthermore, combination-treated tumors exhibit a significantly lower average tumor weight at study termination than control. Moreover, there was no effect on the body weights of mice [4].
Animal Research BALB/c nude (nu/nu) female mice are used. U251 cells (5×10^6 cells in 50 μL of serum-free DMEM) are inoculated subcutaneously into the right flank of 5-week-old female mice after acclimatization for a week. Tumor growth is measured daily with calipers. When the tumors reach a mean volume of 90-120 mm3, animals are randomized into groups. In the first experiment, 16 mice are randomly assigned to Cucurbitacin I (1 mg/kg/day in 20% DMSO in PBS) or drug vehicle control (20% DMSO in PBS) and dosed intraperitoneally with 100 μL of vehicle or drug once daily for 18 days, whereas, in the second, 20 mice are assigned to four groups. Control animals receive 20% DMSO in PBS vehicle, whereas treated animals are injected with Cucurbitacin I (1 mg/kg/day) in 20% DMSO in PBS, CQ (25 mg/kg/day) in 20% DMSO in PBS, and Cucurbitacin I (1 mg/kg/day) plus CQ (25 mg/kg/day) in 20% DMSO in PBS and dosed intraperitoneally with 100 μL of vehicle or drug once daily for 15 days [4].
Synonyms JSI-124, NSC-521777, Elatericin B
Molecular Weight 514.65
Formula C30H42O7
CAS No. 2222-07-3


Powder: -20°C for 3 years | In solvent: -80°C for 2 years

Solubility Information

DMSO: 95 mg/mL (184.59 mM)

( < 1 mg/ml refers to the product slightly soluble or insoluble )

References and Literature

1. Song J, et al. Cucurbitacin I inhibits cell migration and invasion and enhances chemosensitivity in colon cancer. Oncol Rep. 2015 Apr;33(4):1867-71. 2. Jeong MH, et al. Cucurbitacin I Attenuates Cardiomyocyte Hypertrophy via Inhibition of Connective Tissue Growth Factor (CCN2) and TGF- β/Smads Signalings. PLoS One. 2015 Aug 21;10(8):e0136236. 3. van Kester MS, et al. Cucurbitacin I inhibits Stat3 and induces apoptosis in Sézary cells. J Invest Dermatol. 2008 Jul;128(7):1691-5. 4. Yuan G, et al. Cucurbitacin I induces protective autophagy in glioblastoma in vitro and in vivo. J Biol Chem. 2014 Apr 11;289(15):10607-19.


1. Gong X, Liu Y, Liang K, et al.Cucurbitacin I Reverses Tumor-Associated Macrophage Polarization to Affect Cancer Cell Metastasis.International Journal of Molecular Sciences.2023, 24(21): 15920.

Related compound libraries

This product is contained In the following compound libraries:
Anti-Cancer Active Compound Library Immuno-Oncology Compound Library Anti-Pancreatic Cancer Compound Library Anti-Cancer Compound Library Cancer Cell Differentiation Compound Library Terpene Natural Product Library Bioactive Compounds Library Max Anti-Tumor Natural Product Library Stem Cell Differentiation Compound Library Natural Product Library

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S-Ruxolitinib DTP3 JAK 3 inhibitor IV SB1317 JAK-IN-5 hydrochloride JAK3 covalent inhibitor-1 JBJ-02-112-05 TAS05567

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Cucurbitacin I 2222-07-3 Angiogenesis Chromatin/Epigenetic JAK/STAT signaling Stem Cells JAK STAT Janus kinase NSC521777 Inhibitor JSI-124 NSC-521777 Elatericin B JSI 124 JSI124 NSC 521777 inhibit inhibitor