1. Cell Cycle/DNA Damage
    Metabolic Enzyme/Protease
    Antibody-drug Conjugate/ADC Related
  2. HSP
    ADC Cytotoxin

Triptolide (Synonyms: PG490; PG 490; PG-490)

Cat. No.: HY-32735 Purity: 99.83%
Data Sheet SDS Handling Instructions

Triptolide is an inhibitor of heat shock factor (HSF1), inhibits HSP90-CDC37 binding and induces acetylation of HSP90, and also inhibits MDM2 expression in a dose-dependent manner with IC50 values range from 47 to 73 nM.

For research use only. We do not sell to patients.
Triptolide Chemical Structure

Triptolide Chemical Structure

CAS No. : 38748-32-2

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10 mM * 1 mL in DMSO $71 In-stock
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5 mg $90 In-stock
10 mg $130 In-stock
25 mg $300 In-stock
100 mg $990 In-stock
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Top Publications Citing Use of Products

    Triptolide purchased from MCE. Usage Cited in: Int J Mol Sci. 2016 Dec 19;17(12). pii: E2139.

    To explore the cellular mechanisms for the suppression of CNE cells by TPL and IR, the expression of p65, phosph-p65, Bcl-2, and Bax in CNE cells are examined by Western blot, with β-actin as protein loading control. Western blot assay for Bax, Bcl-2, phosph-p65, and p65 expression in vitro with combined treatment with TPL and IR.
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    Triptolide is an inhibitor of heat shock factor (HSF1), inhibits HSP90-CDC37 binding and induces acetylation of HSP90, and also inhibits MDM2 expression in a dose-dependent manner with IC50 values range from 47 to 73 nM.

    IC50 & Target

    heat shock factor (HSF1)[1]
    IC50: 47 to 73 nM (MDM2, in ALL cell lines)[2]

    In Vitro

    Triptolide induces apoptosis in cultured and primary Chronic Lymphocytic Leukemia (CLL) B-cells. Treatment of CD19+ B cells with Triptolide, induces a dose-dependent increase in apoptosis in cultured and primary CLL cells. Triptolide is selectively toxic to both high risk (n=5) and low risk CLL (n=12) B cells (10 to 50 nM range) while largely sparing normal B-cells (n=5). Consistent with the inhibition of heat-shock induced HSP transcription, treatment with Triptolide attenuates heat-shock induced expression of HSPs[1]. Triptolide is a natural product derived from the Chinese plant Tripterygium wilfordii, is reported to exhibit antitumor effects in a broad range of cancers. Triptolide inhibits MDM2 expression in a dose-dependent manner, even at low concentrations spanning 20-100 nM in acute lymphoblastic leukemia (ALL) cells. Triptolide exhibits strongly cytotoxic activity in all 8 cell lines having native MDM2 overexpression, with IC50 values range from 47 to 73 nM. Triptolide exhibits much less cytotoxic effect on EU-4 cells that express very low level of MDM2, while it effectively kill these cells when MDM2 is stably transfected (IC50 values: 725 nM vs. 88 nM)[2]. Differentiated PC12 cells are incubated with different concentrations of Triptolide (0.01, 0.1, and 1 nM) in the presence of 10 μM Aβ25-35 for 24 hours and MTT assay is used to detect the effect of Triptolide. The results show that Aβ25-35 can decrease the cell viability and when treated with Triptolide the viability of differentiated PC12 cells is significantly increased. The results indicate that Triptolide can alleviate cellular damage caused by Aβ25-35, which means that Triptolide has a neuroprotective effect[3].

    In Vivo

    The Triptolide (TP) plasma concentrations are declined rapidly in mice after receive an intravenous dose. After 2h of injection, the Triptolide concentrations are dropped below the lower limit of quantification for all three groups. A comparison of the parameters is made between the control and the treated groups to assess the effect of P-gp inhibition on the Triptolide exposure and elimination. Treatment with the mdr1a-siRNA can significantly enhance the Triptolide plasma exposure, with the Cmax increases from 413±74 to 510±94 ng/mL (P<0.05) and the AUC from 103.5±9.6 to 154.3±30.2 ng•h/mL (P<0.05). In the concomitant group with Tariquidar, the significantly increased AUC is also noted, from 103.5±9.6 of the control to 145.9±24.6 ng•h/mL of the Triptolide+Tariquidar group (P<0.05). Accordingly, the total body clearance of Triptolide in mice is remarkably decreased, from 9564±1024.2 mL/min/kg of the control to 6576.4±1438.5 (P<0.05) and 5755.4±1200.1 mL/min/kg (P<0.05) for Triptolide+Tariquidar and Triptolide+mdr1a-siRNA groups, respectively[4].

    Clinical Trial
    Sponsor Condition Start Date Phase
    Peking Union Medical College Hospital HIV infection Phase 2
    Minneamrita Therapeutics LLC Metastatic gastrointestinal cancer Phase 1
    Preparing Stock Solutions
    Concentration Volume (DMSO) Mass 1 mg 5 mg 10 mg
    1 mM 2.7747 mL 13.8735 mL 27.7469 mL
    5 mM 0.5549 mL 2.7747 mL 5.5494 mL
    10 mM 0.2775 mL 1.3873 mL 2.7747 mL
    Cell Assay

    Triptolide is dissolved in DMSO (1 mg/mL) and stored, and then diluted with RPMI 1640 medium before use[3].

    The viability of differentiated PC12 cells treated with different concentrations of Triptolide. After differentiated PC12 cells are cultured on 96-well plates with RPMI 1640 medium for stabilization, differentiated PC12 cells are incubated with different concentrations of Triptolide (0.01, 0.1, and 1 nM) for 24 hours. The concentrations in this study are chosen. Then cell viability is determined by the MTT assay. Each condition and experiment is repeated three times[3].

    Animal Administration

    Triptolide (TP) is prepared in saline (Mice)[4].

    Male BALB/C mice (weight, 18-22 g) are used. For Triptolide (TP) plasma kinetic study and toxicological evaluation, mice are divided into four groups (n=5 each) to collect blood and tissue samples: (1) normal+saline group; (2) 1.0 mg/kg Triptolide+15 nmol negative control (NC) siRNA-siRNA group; (3) 1.0 mg/kg Triptolide+15 nmol mdr1a-siRNA group; (4) 1.0 mg/kg Triptolide+10 mg/kg Tariquidar group. In order to avoid the complication caused by drug absorption or possible intestinal first-pass effect, Triptolide and the inhibitor are intravenously administrated to mice. The siRNA group is intravenously injected with NC-siRNA or mdr1a-siRNA 2 days before Triptolide dose. For Triptolide+Tariquidar group, the mice are received an intravenous Tariquidar dose 20 min prior to the Triptolide injection. Blood samples are collected at 2, 5, 10, 15, 30, 60 and 120 min after Triptolide dosing. To assess the liver exposure of Triptolide, liver tissue samples are collected from another set of mice at 5, 30, 60 and 120 min after dosing. Three Triptolide groups are design for this experiment, including Triptolide+NC-siRNA group, Triptolide+mdr1a-siRNA group and Triptolide+Tariquidar group. The liver tissue samples are weighed and then homogenized in 10 volume (w:v) of ice-cold saline. The concentrations of Triptolide in plasma and liver tissue are measured by a validated LC-MS/MS method.





    CAS No.


    Powder -20°C 3 years
      4°C 2 years
    In solvent -80°C 6 months
      -20°C 1 month

    Room temperature in continental US; may vary elsewhere

    Solvent & Solubility

    DMSO: ≥ 33 mg/mL

    * "<1 mg/mL" means slightly soluble or insoluble. "≥" means soluble, but saturation unknown.

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