Abexinostat (PCI24781; CRA024781)

Alias: CRA024781; PCI24781; CRA 024781; PCI-24781; CRA024781; PCI 24781; CRA-024781
Cat No.:V0282 Purity: ≥98%
Abexinostat (formerly PCI-24781; CRA-024781) is a novel, potent and hydroxamic acid-based pan-HDAC (histone deacetylase) inhibitor with potential anticancer activity.
Abexinostat (PCI24781; CRA024781) Chemical Structure CAS No.: 783355-60-2
Product category: HDAC
This product is for research use only, not for human use. We do not sell to patients.
Size Price Stock Qty
1mg
5mg
10mg
25mg
50mg
100mg
250mg
Other Sizes
Official Supplier of:
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text
Alternate Text

 

  • Business Relationship with 5000+ Clients Globally
  • Major Universities, Research Institutions, Biotech & Pharma
  • Citations by Top Journals: Nature, Cell, Science, etc.
Top Publications Citing lnvivochem Products
Purity & Quality Control Documentation

Purity: ≥98%

Product Description

Abexinostat (formerly PCI-24781; CRA-024781) is a novel, potent and hydroxamic acid-based pan-HDAC (histone deacetylase) inhibitor with potential anticancer activity. It shows moderate potency against HDAC2/3/6/10, >40-fold selectivity over HDAC8, and primarily inhibits HDAC1 with a Ki of 7 nM. Both in vivo and in vitro antitumor efficaciousness are strong points of this substance. Phase II clinical trials are investigating abexinostat (PCI24781; CRA024781) for B-cell lymphoma.

Biological Activity I Assay Protocols (From Reference)
Targets
HDAC1 ( Ki = 7 nM ); HDAC3/SMRT ( Ki = 8.2 nM ); HDAC6 ( Ki = 17 nM ); HDAC2 ( Ki = 19 nM ); HDAC10 ( Ki = 24 nM ); HDAC8 ( Ki = 280 nM ); MBLAC2 ( Ki < 10 nM )
ln Vitro

Abexinostat (CRA 024781) demonstrates potent antitumor efficaciousness against multiple tumor cell lines, with GI50% varying between 0.15 μM and 3.09 μM. With a GI50% of 0.43 μM, abexinostat (CRA 024781) also exhibits antiproliferative effects on HUVEC endothelial cells. In HCT116 or DLD-1 cells, abexinostat (CRA 024781) treatment induces p21 expression, acetylated histones and acetylated tubulin accumulate in a dose-dependent manner, PARP cleaves, and γH2AX accumulates[1]. The transcription of genes specifically linked to HR, such as RAD51, is significantly reduced when HDAC enzymes are inhibited by Abexinostat (CRA 024781). In transfected CHO cells, Abexinostat (CRA 024781) treatment reduces the ability to perform homology-directed repair of I-SceI-induced chromosome breaks, which is consistent with HR inhibition[2]. Abexinostat (CRA 024781) causes soft tissue sarcoma (STS) cells to undergo apoptosis, G2 cell cycle arrest, and S phase depletion. Rad51 transcriptional repression is induced in STS cells by abexinostat (CRA 024781), possibly through increased E2F1 binding to the Rad51 proximal promoter[3].

ln Vivo
Abexinostat (CRA 024781) parenterally produced a statistically significant decrease in tumor growth in mice bearing colon tumor xenografts from DLD-1 or HCT116. Increased α-tubulin acetylation in peripheral blood mononuclear cells and altered expression of multiple genes, including those involved in apoptosis and cell growth, are observed in conjunction with tumor growth inhibition[1].
Enzyme Assay
A trypsin-coupled assay that runs continuously is used to measure HDAC activity. Measurements in a reaction volume of 100 μL using 96-well assay plates are performed for inhibitor characterization. The HDAC protein is combined with PCI-24781 at different concentrations for each isozyme and incubated for 15 minutes. The reaction buffer is 50 mM HEPES, 100 mM KCl, 0.001% Tween 20, 5% DMSO (pH 7.4), supplemented with bovine serum albumin at concentrations of 0% (HDAC1), 0.01% (HDAC2, 3, 8, and 10), or 0.05% (HDAC6). The reaction is started by adding acetyl-Gly-Ala-(N-acetyl-Lys)-AMC at a final concentration of 25 μM (HDAC1, 3, and 6), 50 μM (HDAC2 and 10), or 100 μM (HDAC8). Trypsin is added to a final concentration of 50 nM. In duplicates of eight, negative control reactions are carried out without PCI-24781. A fluorescence plate reader is used to track reactions. The fluorescence is measured over a 30-minute period with an excitation wavelength of 355 nm and a detection wavelength of 460 nm, following a 30-minute lag time. Reaction rate is calculated using the fluorescence increase over time. The program BatchKi is used to obtain inhibition constants Ki(app).
Cell Assay
Following at least two doubling times of culture for ten tumor cell lines and HUVEC, growth is assessed using an Alamar blue fluorometric cell proliferation assay to determine the end of compound exposure. The compound is assayed using half-log intervals ranging from 0.0015 to 10 μmol/L in triplicate wells in 96-well plates at nine concentrations. Each well has a final DMSO concentration of 0.15%. A four-parameter logistic equation is used to estimate the concentration needed to inhibit cell growth by 50% and 95% confidence intervals through nonlinear regression[1].
Animal Protocol
Female BALB/c nu/nu mice are given 3×106 tumor cells each, along with DLD-1 and HCT116 tumor cells, subcutaneously. When the tumor volume was on average -100 mm, treatment with Abexinostat (CRA 024781) began[1]. To measure the antitumor activity of Abexinostat (CRA 024781), mice with human colon tumor xenografts are given different doses and schedules of the drug intravenously [1].
References

[1]. CRA-024781: a novel synthetic inhibitor of histone deacetylase enzymes with antitumor activity in vitro and in vivo. Mol Cancer Ther, 2006, 5(5), 1309-1317.

[2]. HDAC inhibitor PCI-24781 decreases RAD51 expression and inhibits homologous recombination. Proc Natl Acad Sci U S A, 2007, 104(49), 19482-19487.

[3]. Combining PCI-24781, a novel histone deacetylase inhibitor, with chemotherapy for the treatment of soft tissue sarcoma. Clin Cancer Res, 2009, 15(10), 3472-3483.

[4]. Target deconvolution of HDAC pharmacopoeia reveals MBLAC2 as common off-target. Nat Chem Biol. 2022 Aug;18(8):812-820.

These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C21H23N3O5
Molecular Weight
397.42
Exact Mass
397.16
Elemental Analysis
C, 63.46; H, 5.83; N, 10.57; O, 20.13
CAS #
783355-60-2
Related CAS #
783355-60-2; 783356-67-2 (HCl)
Appearance
White to off-white solid powder
SMILES
CN(C)CC1=C(OC2=CC=CC=C21)C(=O)NCCOC3=CC=C(C=C3)C(=O)NO
InChi Key
MAUCONCHVWBMHK-UHFFFAOYSA-N
InChi Code
InChI=1S/C21H23N3O5/c1-24(2)13-17-16-5-3-4-6-18(16)29-19(17)21(26)22-11-12-28-15-9-7-14(8-10-15)20(25)23-27/h3-10,27H,11-13H2,1-2H3,(H,22,26)(H,23,25)
Chemical Name
3-[(dimethylamino)methyl]-N-[2-[4-(hydroxycarbamoyl)phenoxy]ethyl]-1-benzofuran-2-carboxamide
Synonyms
CRA024781; PCI24781; CRA 024781; PCI-24781; CRA024781; PCI 24781; CRA-024781
HS Tariff Code
2934.99.9001
Storage

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Shipping Condition
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
Solubility Data
Solubility (In Vitro)
DMSO: 3.3~80 mg/mL (8.4~201.3 mM)
Water: <1 mg/mL
Ethanol: <1 mg/mL
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 2.5162 mL 12.5811 mL 25.1623 mL
5 mM 0.5032 mL 2.5162 mL 5.0325 mL
10 mM 0.2516 mL 1.2581 mL 2.5162 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.

Calculator

Molarity Calculator allows you to calculate the mass, volume, and/or concentration required for a solution, as detailed below:

  • Calculate the Mass of a compound required to prepare a solution of known volume and concentration
  • Calculate the Volume of solution required to dissolve a compound of known mass to a desired concentration
  • Calculate the Concentration of a solution resulting from a known mass of compound in a specific volume
An example of molarity calculation using the molarity calculator is shown below:
What is the mass of compound required to make a 10 mM stock solution in 5 ml of DMSO given that the molecular weight of the compound is 350.26 g/mol?
  • Enter 350.26 in the Molecular Weight (MW) box
  • Enter 10 in the Concentration box and choose the correct unit (mM)
  • Enter 5 in the Volume box and choose the correct unit (mL)
  • Click the “Calculate” button
  • The answer of 17.513 mg appears in the Mass box. In a similar way, you may calculate the volume and concentration.

Dilution Calculator allows you to calculate how to dilute a stock solution of known concentrations. For example, you may Enter C1, C2 & V2 to calculate V1, as detailed below:

What volume of a given 10 mM stock solution is required to make 25 ml of a 25 μM solution?
Using the equation C1V1 = C2V2, where C1=10 mM, C2=25 μM, V2=25 ml and V1 is the unknown:
  • Enter 10 into the Concentration (Start) box and choose the correct unit (mM)
  • Enter 25 into the Concentration (End) box and select the correct unit (mM)
  • Enter 25 into the Volume (End) box and choose the correct unit (mL)
  • Click the “Calculate” button
  • The answer of 62.5 μL (0.1 ml) appears in the Volume (Start) box
g/mol

Molecular Weight Calculator allows you to calculate the molar mass and elemental composition of a compound, as detailed below:

Note: Chemical formula is case sensitive: C12H18N3O4  c12h18n3o4
Instructions to calculate molar mass (molecular weight) of a chemical compound:
  • To calculate molar mass of a chemical compound, please enter the chemical/molecular formula and click the “Calculate’ button.
Definitions of molecular mass, molecular weight, molar mass and molar weight:
  • Molecular mass (or molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
  • Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
/

Reconstitution Calculator allows you to calculate the volume of solvent required to reconstitute your vial.

  • Enter the mass of the reagent and the desired reconstitution concentration as well as the correct units
  • Click the “Calculate” button
  • The answer appears in the Volume (to add to vial) box
In vivo Formulation Calculator (Clear solution)
Step 1: Enter information below (Recommended: An additional animal to make allowance for loss during the experiment)
Step 2: Enter in vivo formulation (This is only a calculator, not the exact formulation for a specific product. Please contact us first if there is no in vivo formulation in the solubility section.)
+
+
+

Calculation results

Working concentration mg/mL;

Method for preparing DMSO stock solution mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.

Method for preparing in vivo formulation:Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O,mix and clarify.

(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
             (2) Be sure to add the solvent(s) in order.

Clinical Trial Information
NCT Number Recruitment interventions Conditions Sponsor/Collaborators Start Date Phases
NCT03939182 Active
Recruiting
Drug: Abexinostat
Drug: Ibrutinib
Diffuse Large B-cell Lymphoma
Mantle Cell Lymphoma
Memorial Sloan Kettering Cancer
Center
May 29, 2019 Phase 1
NCT03600441 Active
Recruiting
Drug: Abexinostat Follicular Lymphoma Xynomic Pharmaceuticals, Inc. August 27, 2018 Phase 2
NCT03590054 Active
Recruiting
Drug: Abexinostat
Biological: Pembrolizumab
Locally Advanced Melanoma
Metastatic Melanoma
Rahul Aggarwal August 20, 2018 Phase 1
NCT03934567 Recruiting Drug: Abexinostat Lymphoma, Follicular Xynomic Pharmaceuticals, Inc. April 22, 2020 Phase 2
NCT03936153 Recruiting Drug: abexinostat Diffuse Large B-cell Lymphoma
(DLBCL)
Xynomic Pharmaceuticals, Inc. January 20, 2020 Phase 2
Biological Data
  • PCI-24781 (Abexinostat)

    PCI-24781 decreases RAD51 protein levels. Proc Natl Acad Sci U S A. 2007 Dec 4; 104(49): 19482–19487.
  • PCI-24781 (Abexinostat)

    PCI-24781 inhibits homologous recombinational repair.
  • PCI-24781 (Abexinostat)

    Pretreatment with PCI-24781 enhances sensitivity to radiation in three tumor cell lines
Contact Us Back to top