1. Cytoskeleton Autophagy Apoptosis Metabolic Enzyme/Protease Protein Tyrosine Kinase/RTK Immunology/Inflammation
  2. HIF/HIF Prolyl-Hydroxylase Integrin Autophagy Apoptosis Endogenous Metabolite ROS Kinase COX
  3. Cucurbitacin B

Cucurbitacin B belongs to a class of highly oxidized tetracyclic triterpenoids and is oral active. Cucurbitacin B inhibits tumor cell growth, migration and invasion and cycle arrest, but induces cell apoptosis. Cucurbitacin B has potent anti-inflammatory, antioxidant, antiviral, hypoglycemic, hepatoprotective, neuroprotective activity.

For research use only. We do not sell to patients.

CAS No. : 6199-67-3

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Customer Review

Based on 11 publication(s) in Google Scholar

Other Forms of Cucurbitacin B:

Top Publications Citing Use of Products

    Cucurbitacin B purchased from MedChemExpress. Usage Cited in: Int J Mol Sci. 2024 Aug 28;25(17):9333.  [Abstract]

    Effect of Cucurbitacin B (Cu B) on the cell viability of WPMY-1 and HPRF. Cu B and Doxa inhibited the proliferation of WPMY-1 and HPRF cells based on CCK-8 results. Prostate cells were treated with vehicle (0.1% DMSO), doxazosin (40 μM), or Cu B (12.5 nM, 25 nM, 50 nM, 100 nM, 200 nM) for 48 h and 72 h. The positive control drug doxazosin 40 μM significantly reduced the survival rate of both cells compared with the solvent control group. After 72 h of treatment with Cu B at medium to high concentrations (25 nM–200 nM), the survival rate of WPMY-1 cells was significantly reduced compared with the solvent control group. Only after 72 h of treatment with the highest concentration (200 nM) of Cu B was the survival rate of HPRF cells significantly reduced compared with the solvent control group.

    Cucurbitacin B purchased from MedChemExpress. Usage Cited in: Int J Mol Sci. 2024 Aug 28;25(17):9333.  [Abstract]

    Apoptosis of WPMY-1 and HPRF that were treated with Cucurbitacin B (Cu B) and Doxa. Cu B and Doxa induced the apoptosis of prostate cells based on the results of flow cytometry analysis. In WPMY-1 cells, the apoptosis rate of the Doxa group and the middle-to-high concentration Cu B (50 nM–100 nM; 48 h) group was significantly increased compared with the control group. In HPRF cells, only the apoptosis rate of the high-concentration Cu B (50 nM–100 nM; 48 h) group was significantly increased compared with the control group.

    Cucurbitacin B purchased from MedChemExpress. Usage Cited in: Mech Ageing Dev. 2020 Oct;191:111347.  [Abstract]

    H2O2-treated NIH3T3 cells were incubated in complete medium with different STAT3 inhibitors including AG490 (50 μM), Stattic (0.5 μM), Cucurbitacin B (CuB, 40 ng/mL), S3I-201 (50 μM) and NF-κB inhibitor QNZ (5 μM) for 3 days. Cells lysates were subjected to immunoblotting. The results showed that Cucurbitacin B reduced the expression of p21.

    Cucurbitacin B purchased from MedChemExpress. Usage Cited in: Mech Ageing Dev. 2020 Oct;191:111347.  [Abstract]

    H2O2-treated NIH3T3 cells were incubated in complete medium with different STAT3 inhibitors including AG490 (50 μM), Stattic (0.5 μM), Cucurbitacin B (CuB, 40 ng/mL), S3I-201 (50 μM) and NF-κB inhibitor QNZ (5 μM) for 3 days. Cells were stained for SA-β-Gal and quantified.

    Cucurbitacin B purchased from MedChemExpress. Usage Cited in: Mech Ageing Dev. 2020 Oct;191:111347.  [Abstract]

    H2O2-treated NIH3T3 cells were incubated in complete medium with different STAT3 inhibitors including AG490 (50 μM), Stattic (0.5 μM), Cucurbitacin B (CuB, 40 ng/mL), S3I-201 (50 μM) and NF-κB inhibitor QNZ (5 μM) for 3 days. qRT-PCR analyses of SASP factors expression.

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    • Biological Activity

    • Purity & Documentation

    • References

    • Customer Review

    Description

    Cucurbitacin B belongs to a class of highly oxidized tetracyclic triterpenoids and is oral active. Cucurbitacin B inhibits tumor cell growth, migration and invasion and cycle arrest, but induces cell apoptosis. Cucurbitacin B has potent anti-inflammatory, antioxidant, antiviral, hypoglycemic, hepatoprotective, neuroprotective activity[1][2][3][4][5].

    Cellular Effect
    Cell Line Type Value Description References
    A549 IC50
    0.088 μM
    Compound: CuB; 1
    Antiproliferative activity against human A549 cells assessed as cell growth inhibition incubated for 72 hrs by SRB assay
    Antiproliferative activity against human A549 cells assessed as cell growth inhibition incubated for 72 hrs by SRB assay
    [PMID: 37681508]
    BXPC-3 IC50
    0.022 μM
    Compound: CuB; 1
    Antiproliferative activity against human BXPC-3 cells assessed as cell growth inhibition incubated for 72 hrs by SRB assay
    Antiproliferative activity against human BXPC-3 cells assessed as cell growth inhibition incubated for 72 hrs by SRB assay
    [PMID: 37681508]
    CFPAC-1 IC50
    0.023 μM
    Compound: CuB; 1
    Antiproliferative activity against human CFPAC-1 cells assessed as cell growth inhibition incubated for 72 hrs by SRB assay
    Antiproliferative activity against human CFPAC-1 cells assessed as cell growth inhibition incubated for 72 hrs by SRB assay
    [PMID: 37681508]
    CHO IC50
    1.99 μM
    Compound: 2
    Cytotoxicity against CHO cells by MTT assay
    Cytotoxicity against CHO cells by MTT assay
    [PMID: 30108825]
    HCT-116 IC50
    0.019 μM
    Compound: CuB; 1
    Antiproliferative activity against human HCT-116 cells assessed as cell growth inhibition incubated for 72 hrs by SRB assay
    Antiproliferative activity against human HCT-116 cells assessed as cell growth inhibition incubated for 72 hrs by SRB assay
    [PMID: 37681508]
    HeLa IC50
    0.024 μM
    Compound: CuB; 1
    Antiproliferative activity against human HeLa cells assessed as cell growth inhibition incubated for 72 hrs by SRB assay
    Antiproliferative activity against human HeLa cells assessed as cell growth inhibition incubated for 72 hrs by SRB assay
    [PMID: 37681508]
    HepG2 IC50
    0.051 μM
    Compound: CuB; 1
    Antiproliferative activity against human HepG2 cells assessed as cell growth inhibition incubated for 72 hrs by SRB assay
    Antiproliferative activity against human HepG2 cells assessed as cell growth inhibition incubated for 72 hrs by SRB assay
    [PMID: 37681508]
    Huh-7 IC50
    4.1 μM
    Compound: 6; CuB
    Cytotoxicity against human Huh-7 cells assessed as reduction in cell viability incubated for 24 hrs by MTT assay
    Cytotoxicity against human Huh-7 cells assessed as reduction in cell viability incubated for 24 hrs by MTT assay
    [PMID: 38382391]
    L02 IC50
    0.011 μM
    Compound: CuB; 1
    Antiproliferative activity against human L02 cells assessed as cell growth inhibition incubated for 72 hrs by SRB assay
    Antiproliferative activity against human L02 cells assessed as cell growth inhibition incubated for 72 hrs by SRB assay
    [PMID: 37681508]
    LNCaP IC50
    0.1 μM
    Compound: 18
    Antiproliferative activity against human LNCaP cells assessed as reduction in cell viability by CellTitre-Glo assay
    Antiproliferative activity against human LNCaP cells assessed as reduction in cell viability by CellTitre-Glo assay
    [PMID: 37428122]
    LNCaP IC50
    0.1 μM
    Compound: 8
    Antiproliferative activity against human LNCAP cells
    Antiproliferative activity against human LNCAP cells
    [PMID: 30195238]
    MCF7 IC50
    0.04 μM
    Compound: CuB; 1
    Antiproliferative activity against human MCF7 cells assessed as cell growth inhibition incubated for 72 hrs by SRB assay
    Antiproliferative activity against human MCF7 cells assessed as cell growth inhibition incubated for 72 hrs by SRB assay
    [PMID: 37681508]
    MCF7 IC50
    12 μM
    Compound: CuB
    Cytotoxicity against human MCF7 cells assessed as reduction in cell viability incubated for 48 hrs by MTT assay
    Cytotoxicity against human MCF7 cells assessed as reduction in cell viability incubated for 48 hrs by MTT assay
    [PMID: 31620225]
    MCF7 IC50
    9.72 μM
    Compound: CuB
    Cytotoxicity against human MCF7 cells assessed as reduction in cell viability incubated for 48 hrs in presence of NQO1 inhibitor dicoumarol by MTT assay
    Cytotoxicity against human MCF7 cells assessed as reduction in cell viability incubated for 48 hrs in presence of NQO1 inhibitor dicoumarol by MTT assay
    [PMID: 31620225]
    MDA-MB-231 IC50
    0.037 μM
    Compound: CuB; 1
    Antiproliferative activity against human MDA-MB-231 cells assessed as cell growth inhibition incubated for 72 hrs by SRB assay
    Antiproliferative activity against human MDA-MB-231 cells assessed as cell growth inhibition incubated for 72 hrs by SRB assay
    [PMID: 37681508]
    PANC-1 IC50
    0.067 μM
    Compound: CuB; 1
    Antiproliferative activity against human PANC-1 cells assessed as cell growth inhibition incubated for 72 hrs by SRB assay
    Antiproliferative activity against human PANC-1 cells assessed as cell growth inhibition incubated for 72 hrs by SRB assay
    [PMID: 37681508]
    PC-3 IC50
    0.1 μM
    Compound: 8
    Antiproliferative activity against human PC3 cells
    Antiproliferative activity against human PC3 cells
    [PMID: 30195238]
    SK-OV-3 IC50
    0.047 μM
    Compound: CuB; 1
    Antiproliferative activity against human SK-OV-3 cells assessed as cell growth inhibition incubated for 72 hrs by SRB assay
    Antiproliferative activity against human SK-OV-3 cells assessed as cell growth inhibition incubated for 72 hrs by SRB assay
    [PMID: 37681508]
    Vero IC50
    0.04 μM
    Compound: CuB
    Cytotoxicity against African green monkey Vero cells assessed as reduction in cell viability incubated for 48 hrs by MTT assay
    Cytotoxicity against African green monkey Vero cells assessed as reduction in cell viability incubated for 48 hrs by MTT assay
    [PMID: 31620225]
    In Vitro

    Cucurbitacin B (up to 40 μM, 12-48 h) inhibits the cell growth and arrests cell cycle progression at the G2/M phase in CCA cell lines [2].
    Cucurbitacin B (0.1, 0.3 and 1 μM) increases the level of total superoxide dismutase(T-SOD) and SOD-1, but decrease the reactive oxygen species (ROS) and malondialdehyde (MDA) in BY4741 yeast cells[3].

    MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

    Cell Viability Assay[2]

    Cell Line: CCA cell lines
    Concentration: 0.1, 1 0.5, 1,5, 10, 20, 40 μM
    Incubation Time: 24 and 48 h
    Result: Decreased cell viability in a dose-dependent and time-dependent manner with the IC50 values of 13:44 μM for 24 h and 1.55 for 48 h.

    Cell Cycle Analysis[2]

    Cell Line: CCA cell lines
    Concentration: 0.1, 1, 10 μM
    Incubation Time: 24 h
    Result: Arrested cell cycle progression at the G2/M phase.

    Western Blot Analysis[2]

    Cell Line: CCA cell lines
    Concentration: 0.1, 1 0.5, 1,5, 10, 20, 40 μM
    Incubation Time: 12 and 24 h
    Result: Decreased the expression of Cyclin A, Cyclin D1, Cdc25A, but increased the level of p21.
    In Vivo

    Cucurbitacin B (5 mg/kg, oral administration 10day) B shows protective effects against carrageenan-induced prostatitis in rats[4].
    Cucurbitacin B (20-50 mg/kg for i.p., 28 day) B afford a decline in AD symptoms and protects neurons against STZ-ICV toxicity that improved memory functions in rats[5].

    MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

    Animal Model: Carrageenan-induced prostatic inflammation in rats[4]
    Dosage: 5mg/kg/day for 10day
    Administration: Oral administration
    Result: Decreased the level of TNF-α, IL-1b, COX-2 and iNOS in prostatic tissues.
    Animal Model: STZ-ICV rat prototype of AD-like dementia[5]
    Dosage: 20, 50mg/kg/day for 28days
    Administration: Intraperitoneal injection (i.p.)
    Result: Decreased the TNF-α, IL-1β, MPO, iNOS, acetylcholinesterase, and glutamate levels, but increased gamma-aminobutyric acid.
    Increase in viable neuron density in the cortex and hippocampus of rats.
    Molecular Weight

    558.70

    Formula

    C32H46O8

    CAS No.
    Appearance

    Solid

    Color

    White to off-white

    SMILES

    O[C@H](C1)[C@@]([C@@](C)(O)C(/C=C/C(OC(C)=O)(C)C)=O)([H])[C@](C2)(C)[C@]1(C)[C@]3([H])CC=C4C(C)(C)C([C@@H](O)C[C@@]4([H])[C@]3(C)C2=O)=O

    Structure Classification
    Initial Source
    Shipping

    Room temperature in continental US; may vary elsewhere.

    Storage
    Powder -20°C 3 years
    4°C 2 years
    In solvent -80°C 6 months
    -20°C 1 month
    Solvent & Solubility
    In Vitro: 

    DMSO : 100 mg/mL (178.99 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

    H2O : < 0.1 mg/mL (insoluble)

    Preparing
    Stock Solutions
    Concentration Solvent Mass 1 mg 5 mg 10 mg
    1 mM 1.7899 mL 8.9493 mL 17.8987 mL
    5 mM 0.3580 mL 1.7899 mL 3.5797 mL
    View the Complete Stock Solution Preparation Table

    * Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
    Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

    • Molarity Calculator

    • Dilution Calculator

    Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

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    Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

    This equation is commonly abbreviated as: C1V1 = C2V2

    Concentration (start)

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    In Vivo:

    Select the appropriate dissolution method based on your experimental animal and administration route.

    For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
    To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for in vivo experiments, it is recommended to prepare freshly and use it on the same day.
    The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

    • Protocol 1

      Add each solvent one by one:  10% DMSO    40% PEG300    5% Tween-80    45% Saline

      Solubility: ≥ 2.5 mg/mL (4.47 mM); Clear solution

      This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).

      Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.

      Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
    • Protocol 2

      Add each solvent one by one:  10% DMSO    90% (20% SBE-β-CD in Saline)

      Solubility: ≥ 2.5 mg/mL (4.47 mM); Clear solution

      This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).

      Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 900 μL 20% SBE-β-CD in Saline, and mix evenly.

      Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.
    In Vivo Dissolution Calculator
    Please enter the basic information of animal experiments:

    Dosage

    mg/kg

    Animal weight
    (per animal)

    g

    Dosing volume
    (per animal)

    μL

    Number of animals

    Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
    Please enter your animal formula composition:
    %
    DMSO +
    +
    %
    Tween-80 +
    %
    Saline
    Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
    The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
    Calculation results:
    Working solution concentration: mg/mL
    Method for preparing stock solution: mg drug dissolved in μL  DMSO (Stock solution concentration: mg/mL).
    The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only. If necessary, please contact MedChemExpress (MCE).
    Method for preparing in vivo working solution for animal experiments: Take μL DMSO stock solution, add μL . μL , mix evenly, next add μL Tween 80, mix evenly, then add μL Saline.
     If the continuous dosing period exceeds half a month, please choose this protocol carefully.
    Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
    Purity & Documentation

    Purity: 99.81%

    References

    Complete Stock Solution Preparation Table

    * Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
    Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

    Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
    DMSO 1 mM 1.7899 mL 8.9493 mL 17.8987 mL 44.7467 mL
    5 mM 0.3580 mL 1.7899 mL 3.5797 mL 8.9493 mL
    10 mM 0.1790 mL 0.8949 mL 1.7899 mL 4.4747 mL
    15 mM 0.1193 mL 0.5966 mL 1.1932 mL 2.9831 mL
    20 mM 0.0895 mL 0.4475 mL 0.8949 mL 2.2373 mL
    25 mM 0.0716 mL 0.3580 mL 0.7159 mL 1.7899 mL
    30 mM 0.0597 mL 0.2983 mL 0.5966 mL 1.4916 mL
    40 mM 0.0447 mL 0.2237 mL 0.4475 mL 1.1187 mL
    50 mM 0.0358 mL 0.1790 mL 0.3580 mL 0.8949 mL
    60 mM 0.0298 mL 0.1492 mL 0.2983 mL 0.7458 mL
    80 mM 0.0224 mL 0.1119 mL 0.2237 mL 0.5593 mL
    100 mM 0.0179 mL 0.0895 mL 0.1790 mL 0.4475 mL
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