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Tripterin (Celastrol) is a natural product, a proteasome inhibitor that inhibits the pancreatic rennet-like activity of the 20S proteasome (IC50=2.5 μM). Tripterin has anti-inflammatory, anti-infectious, and immunomodulatory properties.
Pack Size | Price | Availability | Quantity |
---|---|---|---|
5 mg | $46 | In Stock | |
10 mg | $72 | In Stock | |
25 mg | $100 | In Stock | |
50 mg | $126 | In Stock | |
100 mg | $171 | In Stock | |
1 mL x 10 mM (in DMSO) | $56 | In Stock |
Description | Tripterin (Celastrol) is a natural product, a proteasome inhibitor that inhibits the pancreatic rennet-like activity of the 20S proteasome (IC50=2.5 μM). Tripterin has anti-inflammatory, anti-infectious, and immunomodulatory properties. |
Targets&IC50 | 20S proteasome:2.5 μM |
In vitro | METHODS: Human prostate cancer cells PC-3 were treated with Tripterin (0.5-5 µM) for 12 h. Proteasomal chymotrypsin-like activity was assayed using Z-GGL-AMC. RESULTS: Tripterin significantly inhibited proteasomal chymotrypsin-like activity in PC-3 cells in a concentration-dependent manner, reaching about 55% inhibition at 2.5 µM. [1] METHODS: Human chronic myeloid leukemia cells KBM-5 were incubated with Tripterin (2.5 µM) for 6 h, followed by treatment with TNF (1 nM) for 6-24 h. Target protein expression levels were detected using Western Blot. RESULTS: TNF induced the expression of anti-apoptotic proteins IAP1, IAP2, Bcl-2, Bcl-XL, c-FLIP and survivin in a time-dependent manner, which was inhibited by Tripterin. [2] |
In vivo | METHODS: To detect anti-tumor activity in vivo, Tripterin (1-3 mg/kg, 10% DMSO+70% Cremophor/ethanol (3:1)+20% PBS) was injected intraperitoneally once daily for sixteen days into nude immunodeficient mice bearing human prostate cancer tumor PC-3. RESULTS: Tripterin treatment significantly inhibited the growth of prostate cancer xenografts and suppressed proteasome activity and induced apoptosis in vivo. [1] METHODS: To detect anti-tumor activity in vivo, Tripterin (1.25 mg/kg) was intraperitoneally injected into BALB/c (nu/nu) mice bearing vestibular nerve sheath tumor SC4 every three days for two weeks. RESULTS: Tripterin significantly inhibited tumor growth without showing toxicity. [3] |
Kinase Assay | Inhibition of purified 20S proteasome activity: A purified rabbit 20S proteasome (0.1 μg) is incubated with 40 μM of various fluorogenic peptide substrates in 100 μL assay buffer (20 mM Tris-HCl (pH 7.5)), in the presence of Celastrol at different concentrations or in the solvent DMSO for 2 hours at 37 ℃, followed by measurement of inhibition of each proteasomal activity. |
Cell Research | The anti-proliferative effect of celastrol on various human tumor cell lines is determined by the MTT uptake method. Briefly, 5×103 cells are incubated with Celastrol in triplicate in a 96-well plate at 37 ℃. MTT solution is then added to each well. After a 2 hours incubation at 37 ℃, extraction buffer (20% SDS, 50% dimethylformamide) is added, cells are incubated overnight at 37 ℃, and the optical density is then measured at 570 nm using a Tecan plate reader.(Only for Reference) |
Alias | Tripterine, Celastrol |
Molecular Weight | 450.61 |
Formula | C29H38O4 |
Cas No. | 34157-83-0 |
Smiles | CC1=C(O)C(=O)C=C2C1=CC=C1[C@@]2(C)CC[C@@]2(C)[C@@H]3C[C@@](C)(CC[C@]3(C)CC[C@]12C)C(O)=O |
Relative Density. | 1.2 g/cm3 |
Storage | Powder: -20°C for 3 years | In solvent: -80°C for 1 year | Shipping with blue ice. | ||||||||||||||||||||||||||||||||||||||||
Solubility Information | DMSO: 60 mg/mL (133.15 mM), Sonication is recommended. ![]() Ethanol: 33.8 mg/mL (75.01 mM), Sonication is recommended. | ||||||||||||||||||||||||||||||||||||||||
In Vivo Formulation | 10% DMSO+40% PEG300+5% Tween 80+45% Saline: 4.51 mg/mL (10.01 mM), In vivo: Please add the solvents sequentially, clarifying the solution as much as possible before adding the next one. Dissolve by heating and/or sonication if necessary. Working solution is recommended to be prepared and used immediately. Please add the solvents sequentially, clarifying the solution as much as possible before adding the next one. Dissolve by heating and/or sonication if necessary. Working solution is recommended to be prepared and used immediately. The formulation provided above is for reference purposes only. In vivo formulations may vary and should be modified based on specific experimental conditions.![]() | ||||||||||||||||||||||||||||||||||||||||
Solution Preparation Table | |||||||||||||||||||||||||||||||||||||||||
Ethanol/DMSO
DMSO
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