Abiraterone

Catalog No.S1123 Batch:S112306

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Technical Data

Formula

C24H31NO
Molecular Weight 349.51 CAS No. 154229-19-3
Solubility (25°C)* In vitro DMSO 1.5 mg/mL (4.29 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.)

Preparing Stock Solutions

Biological Activity

Description Abiraterone is a potent CYP17 inhibitor with IC50 of 2 nM in a cell-free assay. Abiraterone (CB-7598) is an androgen biosynthesis inhibitor.
Targets
CYP17 [1]
(Cell-free assay)
2 nM
In vitro Abiraterone binds and inhibits wild-type and mutant androgen receptor (AR). Abiraterone inhibits in vitro proliferation and androgen receptor-regulated gene expression of androgen receptor-positive prostate cancer cells, which could be explained by androgen receptor antagonism in addition to inhibition of steroidogenesis. In fact, activation of mutant androgen receptor by eplerenone is inhibited by greater concentrations of Abiraterone. Abiraterone displaces ligand from both WT-AR and T877A with EC50 of 13.4 μM and 7.9 μM, respectively. [2]Abiraterone inhibits lyase activity with an IC50 of 5.8 nM in rat testis microsomes. Abiraterone acetate significantly inhibits T secretion (−48%) and in turn increased LH concentration (192%).[3]
In vivo Abiraterone inhibits CYP17 with an IC50 of 72 nM, in human testicular microsomes. [4] Abiraterone fails to significantly reduce the size of any of the organs. [5] Abiraterone reduces the testosterone levels strongly, almost reaching the level of the orchiectomy control. The testosterone levels are reduced by Abiraterone for more than 95% compared to the control group. [6]
Features Approved for the treatment of docetaxel-treated castration-resistant prostate cancer.

Protocol (from reference)

Kinase Assay:[3]
  • C17,20-lyase activity assay

    Microsomes are diluted to a final protein concentration of 50 μg/mL in the reaction mixture which contained 0.25 M sucrose, 20 mM Tris–HCl (pH 7.4), 10 mM G6P and 1.2 IU/mL G6PDH. After equilibration at 37 °C for 10 minutes, the reaction is initiated by addition of βNADP to obtain a final concentration of 0.6 mM. Prior to the distribution of 600 μL of the reaction mixture in each tube, Abiraterone is evaporated to dryness under a stream of nitrogen and then are incubated at 37 °C for 10 minutes. After incubation with Abiraterone, 500 μL of the reaction mixture is transferred to tubes containing 1 μM of the enzyme substrate, 17OHP. After a further 10 minutes incubation, tubes are placed on ice and the reaction is stopped by addition of 0.1 ml NaOH 1N. Tubes are deep-frozen and stored at −20 °C until assayed for Δ4A levels. A Δ4A RIA is developed and automated on a microplate format using a specific antibody against Δ4A. The separation of free and bound antigen is achieved with a dextran-coated charcoal suspension. After centrifugation, aliquots of the clear supernatant are counted in duplicates in a 1450 MicrobetaPlus liquid scintillation counter. The Δ4A concentrations of unknown samples are determined from the standard curve. The detection limit is 0.5 ng/mL and the within and between assay coefficients of variation are 10.7 and 17.6%, respectively at an assay value of 13 ng/mL. The rate of enzymatic reaction is expressed as pmol of Δ4A formed per 10 minutes and per mg of protein. The value of maximum activity without inhibitor (control) is set at 100%. The IC50 values are calculated using non-linear analysis from the plot of enzyme activity (%) against log of inhibitor concentration.
Cell Assay:[2]
  • Cell lines

    LNCaP and VCaP cells

  • Concentrations

    0.1-5 μM

  • Incubation Time

    24 hours or 96 hours

  • Method

    LNCaP and VCaP cells are seeded in 96-well plates and grown in CSS-supplemented phenol red-free or FBS-supplemented media for 7 days. Cells are treated with Abiraterone at 24 hours and 96 hours after plating and cell viability is determined on day 7 by adding CellTiter Glo and measuring luminescence.
Animal Study:[5]
  • Animal Models

    LAPC-4 xenograft mice

  • Dosages

    0.15 mmol/kg

  • Administration

    Administered via s.c.

Customer Product Validation

Data from [Data independently produced by Prostate, 2013, 74, 235-49]

Data from [Data independently produced by , , Oncotarget, 2016, 7(17):23498-511]

Selleck's Abiraterone has been cited by 35 publications

Bayesian Machine Learning Enables Identification of Transcriptional Network Disruptions Associated with Drug-Resistant Prostate Cancer [ Cancer Res, 2023, 83(8):1361-1380] PubMed: 36779846
Proteogenomic characterization identifies clinically relevant subgroups of intrahepatic cholangiocarcinoma [ Cancer Cell, 2021, S1535-6108(21)00659-0] PubMed: 34971568
Genetic Suppressor Element 1 (GSE1) Promotes the Oncogenic and Recurrent Phenotypes of Castration-Resistant Prostate Cancer by Targeting Tumor-Associated Calcium Signal Transducer 2 (TACSTD2) [ Cancers (Basel), 2021, 13(16)3959] PubMed: 34439112
Antiproliferative, proapoptotic, and tumor-suppressing effects of the novel anticancer agent alsevirone in prostate cancer cells and xenografts [ Arch Pharm (Weinheim), 2021, e2100316] PubMed: 34668210
Stepwise binding of inhibitors to human cytochrome P450 17A1 and rapid kinetics of inhibition of androgen biosynthesis [ J Biol Chem, 2021, 297(2):100969] PubMed: 34273352
Abiraterone induces SLCO1B3 expression in prostate cancer via microRNA-579-3p [ Sci Rep, 2021, 11(1):10765] PubMed: 34031488
Effects of MTX-23, a Novel PROTAC of Androgen Receptor Splice Variant-7 and Androgen Receptor, on CRPC resistant to Second-Line Antiandrogen Therapy [ Mol Cancer Ther, 2020, molcanther.0417.2020] PubMed: 33277442
Dual-mTOR Inhibitor Rapalink-1 Reduces Prostate Cancer Patient-Derived Xenograft Growth and Alters Tumor Heterogeneity [ Front Oncol, 2020, 10:1012] PubMed: 32656088
Bioactivity of Curcumin on the Cytochrome P450 Enzymes of the Steroidogenic Pathway. [ Int J Mol Sci, 2019, 20(18)] PubMed: 31533365
CYP17A1 Maintains the Survival of Glioblastomas by Regulating SAR1-Mediated Endoplasmic Reticulum Health and Redox Homeostasis. [ Cancers (Basel), 2019, 11(9)] PubMed: 31527549

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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.

NOT FOR HUMAN, VETERINARY DIAGNOSTIC OR THERAPEUTIC USE.