Home Metabolism P450 (e.g. CYP17) inhibitor - Androgen Receptor inhibitor Abiraterone Acetate For research use only.

Abiraterone Acetate

Synonyms: CB7630 Acetate

Abiraterone Acetate is an acetate salt form of Abiraterone which is a steroidal cytochrome CYP17 inhibitor with IC50 of 72 nM in a cell-free assay. Abiraterone acetate is an oral androgen biosynthesis inhibitor.

Abiraterone Acetate Chemical Structure

Abiraterone Acetate Chemical Structure

CAS: 154229-18-2

Selleck's Abiraterone Acetate has been cited by 32 publications

Purity & Quality Control

Batch: Purity: 99.98%
99.98

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Cell Data

Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID
JM109 Function assay Inhibition of C-terminal His-tagged recombinant human CYP17A1delta19H mutant expressed in Escherichia coli JM109 cells assessed as decrease in progesterone hydroxylation in presence of cytochrome P450 reductase by HPLC-UV method, IC50 = 0.0094 μM. 29792703
P450c17-LNCaP Function assay In vitro cytochrome P450 17A1 inhibition was assayed using the rapid acetic acid releasing assay (AARA), utilizing intact P450c17-expressing Escherichia coli or P450c17-LNCaP cells as the enzyme source, IC50 = 0.8 μM. 12773039
V79MZh11B1 Function assay Inhibition of human CYP11B1 expressed in hamster V79MZh11B1 cells, IC50 = 1.608 μM. 18672868
V79MZh11B1 Function assay Inhibition of recombinant CYP11B1 expressed in expressed in V79MZh11B1 cells, IC50 = 1.608 μM. 19211174
V79MZh Function assay Inhibition of human CYP11B1 expressed in hamster V79MZh cells, IC50 = 1.61 μM. 20550118
V79MZh Function assay Inhibition of human CYP11B1 expressed in hamster V79MZh cells using [1,2-3H]-11-deoxycorticosterone as substrate, IC50 = 1.61 μM. 23859149
V79MZh Function assay Inhibition of human CYP11B2 expressed in hamster V79MZh cells, IC50 = 1.75 μM. 20550118
V79MZh Function assay Inhibition of human CYP11B2 expressed in hamster V79MZh cells using [1,2-3H]-11-deoxycorticosterone as substrate, IC50 = 1.75 μM. 23859149
V79MZh11B2 Function assay Inhibition of human CYP11B2 expressed in hamster V79MZh11B2 cells, IC50 = 1.751 μM. 18672868
LNCAP Antiproliferative assay 72 hrs Antiproliferative activity against human LNCAP cells after 72 hrs by MTT assay, IC50 = 3.29 μM. 29310026
hTERT-BJ Cytotoxicity assay 48 hrs Cytotoxicity against human hTERT-BJ cells assessed as cell growth inhibition after 48 hrs SRB assay, GI50 = 4.5 μM. 29172080
PC3 Antiproliferative assay 72 hrs Antiproliferative activity against human PC3 cells after 72 hrs by MTT assay, IC50 = 5.94 μM. 29310026
MGC803 Antiproliferative assay 72 hrs Antiproliferative activity against human MGC803 cells after 72 hrs by MTT assay, IC50 = 7.72 μM. 29310026
HeLa Antiproliferative assay 48 hrs Antiproliferative activity against human HeLa cells after 48 hrs by SRB assay, GI50 = 7.9 μM. 29172080
PC3 Cytotoxicity assay 48 hrs Cytotoxicity against human PC3 cells assessed as growth inhibition after 48 hrs by MTT assay, IC50 = 9.32 μM. 24148837
GES-1 Antiproliferative assay 72 hrs Antiproliferative activity against human GES-1 cells after 72 hrs by MTT assay, IC50 = 13.12 μM. 29310026
T47D Growth inhibition assay 72 hrs Growth inhibition of human T47D cells after 72 hrs by MTT assay, IC50 = 16.9 μM. 27209562
MDA-MB-231 Growth inhibition assay 72 hrs Growth inhibition of human MDA-MB-231 cells after 72 hrs by MTT assay, IC50 = 19.2 μM. 27209562
MCF7 Growth inhibition assay 72 hrs Growth inhibition of human MCF7 cells after 72 hrs by MTT assay, IC50 = 19.3 μM. 27209562
MDA-MB-361 Growth inhibition assay 72 hrs Growth inhibition of human MDA-MB-361 cells after 72 hrs by MTT assay, IC50 = 20.4 μM. 27209562
T47D Antiproliferative assay 48 hrs Antiproliferative activity against human T47D cells after 48 hrs by SRB assay, GI50 = 24 μM. 29172080
WiDr Antiproliferative assay 48 hrs Antiproliferative activity against human WiDr cells after 48 hrs by SRB assay, GI50 = 42 μM. 29172080
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Biological Activity

Description Abiraterone Acetate is an acetate salt form of Abiraterone which is a steroidal cytochrome CYP17 inhibitor with IC50 of 72 nM in a cell-free assay. Abiraterone acetate is an oral androgen biosynthesis inhibitor.
Features Abiraterone is a drug used in castration-resistant prostate cancer.
Targets
CYP17 [1]
(Cell-free assay)
72 nM
In vitro
In vitro

Abiraterone shows a good complexation with the heme iron only in SM1. [1] Abiraterone blocks the synthesis of androgens by inhibiting CYP17A1. Abiraterone also blocks 3β-hydroxysteroid dehydrogenase (3βHSD), an enzyme that is absolutely required for the synthesis of biologically active androgens. Abiraterone inhibits conversion of DHEA to Δ4-androstenedione. Abiraterone inhibition of 3βHSD blocks DHT synthesis and the androgen receptor response. Abiraterone inhibits the conversion of Δ5-androstenediol to testosterone. [2] Abiraterone inhibits C17,20-lyase, with an IC50 of 5.8 nM, in rat testis microsomes. Abiraterone significantly inhibits testosterone secretion (−48%) and in turn increases LH concentration (192%). [3] Abiraterone inhibits in vitro proliferation and AR-regulated gene expression of AR-positive prostate cancer cells, which could be explained by AR antagonism in addition to inhibition of steroidogenesis. [4]
Kinase Assay C17,20-lyase activity assay
Microsomes are diluted to a final protein concentration of 50 μg/mL in the reaction mixture which contains 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, test compounds are 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 in our laboratory using a specific antibody against Δ4A and instructions provided by Biogenesis. 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 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 Research Cell lines LNCaP and VCaP cells
Concentrations 0 μM -10 μM
Incubation Time 24 hours and 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.
In Vivo
In vivo

Following intraperitoneal administration in a rodent model, abiraterone was found to have rapid deacetylation. When administered as its acetate pro-drug (CB 7630), it suppressed circulating testosterone to undetectable levels and markedly decreased the weights of androgen sensitive organs. Abiraterone is well tolerated and the mean elimination half-life of abiraterone in these studies was 27.6 h (thus supporting the use of once-daily dosing)[5]. Preclinical studies with abiraterone demonstrated reduction in androgen production downstream of CYP17 which resulted in decreased weight of the ventral prostate, testis, and seminal vesicles in mice[6].
Animal Research Animal Models Male NOD/SCID mice with LAPC4 cells
Dosages 0.5 mmol/kg/d
Administration Administered via s.c.
NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT03348670 Active not recruiting Prostate Cancer Han Xu M.D. Ph.D. FAPCR Sponsor-Investigator IRB Chair|Medicine Invention Design Inc August 18 2023 Phase 2|Phase 3
NCT06014853 Recruiting Prostate Cancer Bukwang Pharmaceutical|Dyna Therapeutics August 7 2023 Phase 1
NCT05737082 Completed Healthy Hanmi Pharmaceutical Company Limited March 10 2023 Phase 1

Chemical lnformation & Solubility

Molecular Weight 391.55 Formula

C26H33NO2
CAS No. 154229-18-2 SDF Download Abiraterone Acetate SDF
Smiles CC(=O)OC1CCC2(C3CCC4(C(C3CC=C2C1)CC=C4C5=CN=CC=C5)C)C
Storage (From the date of receipt)

In vitro
Batch:

DMSO : 11 mg/mL ( (28.09 mM)； Moisture-absorbing DMSO reduces solubility. Please use fresh DMSO.)

Water : Insoluble

Ethanol : Insoluble


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In vivo
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