Celastrol

Catalog No.S1290 Batch:S129004

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Technical Data

Formula

C29H38O4
Molecular Weight 450.61 CAS No. 34157-83-0
Solubility (25°C)* In vitro DMSO 90 mg/mL (199.72 mM)
Water Insoluble
Ethanol Insoluble
* <1 mg/ml means slightly soluble or insoluble.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
* Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

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Biological Activity

Description Celastrol is a potent proteasome inhibitor for the chymotrypsin-like activity of a purified 20S proteasome with IC50 of 2.5 μM. Celastrol induces apoptosis and autophagy via the ROS/JNK signaling pathway. Celastrol inhibits dopaminergic neuronal death of Parkinson's disease through activating mitophagy.
Targets
20S proteasome [1]
(Cell-free assay)
2.5 μM
In vitro Celastrol at 5 μM inhibits the chymotrypsin-like, PGPH-like, and trypsin-like activities of the purified 20S proteasome by 80%, 5%, and <1%, respectively, whereas at 10 μM, it inhibits these three proteasomal activities by ∼90%, 15%, and <1%, respectively. Celastrol significantly inhibits the proteasomal chymotrypsin activity in PC-3 cells in a concentration-dependent manner. Celastrol at 2.5 μM to 5 μM induces caspase-3 activity by 4.7-fold to 5.5-fold in PC-3 cells. Celastrol (5 μM) treated cells, the levels of the proteasome target proteins, IκB-α and Bax, are increased after 1 hour and further increased to its peak for 4 hours to 12 hours. Celastrol (2.5 μM) treatment induces proteasome inhibition by 40%, as shown by the decreased levels of chymotrypsin-like activity and increased accumulation of ubiquitinated proteins in LNCaP cells. Celastrol (2.5 μM) induces apoptosis in the Celastrol-treated LNCaP cells, as shown by increased levels of caspase-3 activity (up to 3.5-fold), PARP cleavage, and apoptotic morphology. [1] Celastrol (300 nM) is found to suppress LPS-induced production of TNF-alpha and IL-1beta by human monocytes and macrophages. Celastrol (100 nM) also decreases LPS-induced expression of class II MHC molecules by microglia. Celastrol strongly inhibits LPS and IFN-y-induced NO production with IC50 of 200 nM in macrophage lineage cells. Celastrol strongly inhibits TNF-α and IFN-γ-induced NO production with IC50 of 200 nM in endothelial cells. [2] Celastrol (2.5 μM) potentiates the apoptosis induced by TNF and chemotherapeutic agents and inhibits invasion, both regulated by NF-kappaB activation, in KBM-5 cells. Celastrol (2.5 μM) suppresses the expression of TNF induced the expression of gene products involved in antiapoptosis (IAP1, IAP2, Bcl-2, Bcl-XL, c-FLIP, and survivin), proliferation (cyclin D1 and COX-2), invasion (MMP-9), and angiogenesis (VEGF) in KBM-5 cells. Celastrol (5 μM) is found to inhibit the TNF-induced activation of IkappaBalpha kinase, IkappaBalpha phosphorylation, IkappaBalpha degradation, p65 nuclear translocation and phosphorylation, and NF-kappaB-mediated reporter gene expression. [3] Celastrol inhibits proliferating of RPMI 8226, KATOIII, UM-SCC1, U251MG and MDA-MB-231 cells with IC50 of 0.52 μM, 0.54 μM, 0.76 μM, 0.69 μM and 0.67 μM, respectively. Celastrol (1 μM) inhibits growth of RPMI 8226 with a decrease in the levels of cyclin D1 and cyclin E, but concomitant increase in the levels of p21 and p27. Celastrol induces apoptosis in RPMI-8226 cells indicated by the activation of caspase-8, bid cleavage, caspase-9 activation, caspase-3 activation, PARP cleavage and through the down regulation of anti-apoptototic proteins. Celastrol (1 μM) suppresses Akt pathway and activates JNK kinase in RPMI-8226 cells. [4]
In vivo Celastrol (3 mg/kg) results in significant inhibition (up to 70%) of tumor growth in male nude mice bearing PC-3 tumors, associated with increased p27 levels and Bax level. Celastrol (3 mg/kg) results more apoptotic tumor cells with the appearance of various PARP cleavage fragments in tumor of male nude mice bearing PC-3 tumors. Celastrol (3 mg/kg) causes 35% of tumor inhibition, associated with decreased proteasome activity and decreased expression of AR protein in nude mice bearing C4-2B tumors. [1] Celastrol (3 mg/kg) is found to suppress strongly joint swelling and other manifestations of adjuvant arthritis in mice. Celastrol (0.2 mg/kg) significantly improves the performance in memory, learning and psychomotor activity tests in rats. [2]
Features A potent antioxidant and anti-inflammatory drug.

Protocol (from reference)

Kinase Assay:[1]
  • 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 Assay:[4]
  • Cell lines

    RPMI 8226, KATOIII, UM-SCC1, U251MG and MDA-MB-231 cells

  • Concentrations

    ~5 μM

  • Incubation Time

    2 hours

  • Method

    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.
Animal Study:[1]
  • Animal Models

    nude mice bearing C4-2B tumors

  • Dosages

    3 mg/kg

  • Administration

    Intraperitoneal injection

Customer Product Validation

, , Oncotarget, 2016, 7(20):29648-63.

Data from [Data independently produced by , , Eur J Med Chem, 2017, 136:63-73]

Selleck's Celastrol has been cited by 25 publications

Mechanistic study of celastrol-mediated inhibition of proinflammatory activation of macrophages in IgA nephropathy via down-regulating ECM1 [ Int J Biol Sci, 2024, 20(14):5731-5746] PubMed: 39494325
Functional Characterization of a Spectrum of Genetic Variants in a Family with Succinic Semialdehyde Dehydrogenase Deficiency [ Int J Mol Sci, 2024, 25(10)5237] PubMed: 38791277
Celastrol regulates the oligomeric state and chaperone activity of αB-crystallin linked with protein homeostasis in the lens [ Fundam Res, 2024, 4(2):394-400] PubMed: 38933503
A NRF2-induced secretory phenotype activates immune surveillance to remove irreparably damaged cells [ Redox Biol, 2023, 66:102845] PubMed: 37597423
A NRF2-induced secretory phenotype activates immune surveillance to remove irreparably damaged cells [ Redox Biol, 2023, 66:102845] PubMed: 37597423
Celastrol targeting Nedd4 reduces Nrf2-mediated oxidative stress in astrocytes after ischemic stroke [ J Pharm Anal, 2023, 13(2):156-169] PubMed: 36908855
Celastrol targeting Nedd4 reduces Nrf2-mediated oxidative stress in astrocytes after ischemic stroke [ J Pharm Anal, 2023, 13(2):156-169] PubMed: 36908855
Celastrol alleviates oxidative stress induced by multi-walled carbon nanotubes through the Keap1/Nrf2/HO-1 signaling pathway [ Ecotoxicol Environ Saf, 2023, 252:114623] PubMed: 36774793
Celastrol inhibits necroptosis by attenuating the RIPK1/RIPK3/MLKL pathway and confers protection against acute pancreatitis in mice [ Int Immunopharmacol, 2023, 117:109974] PubMed: 37012867
Network Pharmacology and Experimental Validation to Explore That Celastrol Targeting PTEN is the Potential Mechanism of Tripterygium wilfordii (Lév.) Hutch Against IgA Nephropathy [ Drug Des Devel Ther, 2023, 17:887-900] PubMed: 36992900

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SHIPPING AND STORAGE
Selleck products are transported at room temperature. If you receive the product at room temperature, please rest assured, the Selleck Quality Inspection Department has conducted experiments to verify that the normal temperature placement of one month will not affect the biological activity of powder products. After collecting, please store the product according to the requirements described in the datasheet. Most Selleck products are stable under the recommended conditions.

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