1. Cell Cycle/DNA Damage
    Epigenetics
  2. HDAC
  3. Abexinostat

Abexinostat (Synonyms: CRA 024781; PCI-24781)

Cat. No.: HY-10990 Purity: 98.61%
Handling Instructions

Abexinostat (CRA 024781) is a novel pan-HDAC inhibitor mostly targeting HDAC1 with Ki of 7 nM.

For research use only. We do not sell to patients.

Abexinostat Chemical Structure

Abexinostat Chemical Structure

CAS No. : 783355-60-2

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Description

Abexinostat (CRA 024781) is a novel pan-HDAC inhibitor mostly targeting HDAC1 with Ki of 7 nM.

IC50 & Target

HDAC1

7 nM (Ki)

HDAC3/SMRT

8.2 nM (Ki)

HDAC6

17 nM (Ki)

HDAC2

19 nM (Ki)

HDAC10

24 nM (Ki)

HDAC8

280 nM (Ki)

In Vitro

Abexinostat (CRA 024781) exhibits potent antitumor activity against a variety of tumor cell lines with GI50% ranging from 0.15 μM to 3.09 μM. Abexinostat (CRA 024781) also has an antiproliferative effect on HUVEC endothelial cells with GI50% of 0.43 μM. Abexinostat (CRA 024781) treatment causes dose-dependent accumulation of both acetylated histones and acetylated tubulin in HCT116 or DLD-1 cells, induces expression of p21, and leads to PARP cleavage and accumulation of the γH2AX[1]. Inhibition of HDAC enzymes by Abexinostat (CRA 024781) leads to a significant reduction in the transcription of genes specifically associated with HR, including RAD51. Consistent with inhibition of HR, Abexinostat (CRA 024781) treatment results in a decreased ability to perform homology directed repair of I-SceI-induced chromosome breaks in transfected CHO cells[2]. Abexinostat (CRA 024781) induces S phase depletion, G2 cell cycle arrest, and apoptosis in soft tissue sarcoma (STS) cells. Abexinostat (CRA 024781) induces Rad51 transcriptional repression in STS cells potentially mediated via enhanced E2F1 binding to the Rad51 proximal promoter[3].

In Vivo

Abexinostat (CRA 024781) parenterally administered to mice harboring HCT116 or DLD-1 colon tumor xenografts results in a statistically significant reduction in tumor growth. Inhibition of tumor growth is accompanied by an increase in the acetylation of α-tubulin in peripheral blood mononuclear cells, and an alteration in the expression of many genes in the tumors, including several involved in apoptosis and cell growth[1].

Clinical Trial
Molecular Weight

397.42

Formula

C₂₁H₂₃N₃O₅

CAS No.

783355-60-2

SMILES

O=C(NCCOC1=CC=C(C=C1)C(NO)=O)C2=C(C3=CC=CC=C3O2)CN(C)C

Shipping

Room temperature in continental US; may vary elsewhere

Storage
Powder -20°C 3 years
  4°C 2 years
In solvent -80°C 6 months
  -20°C 1 month
References
Cell Assay
[1]

Ten tumor cell lines and HUVEC are cultured for at least two doubling times, and growth is monitored at the end of compound exposure using an Alamar blue fluorometric cell proliferation assay. The compound is assayed in triplicate wells in 96-well plates at nine concentrations using half-log intervals ranging from 0.0015 to 10 μmol/L. The final DMSO concentration in each well is 0.15%. The concentration required to inhibit cell growth by 50% and 95% confidence intervals are estimated from nonlinear regression using a four-parameter logistic equation[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Animal Administration
[1]

HCT116 and DLD-1 tumor cells are implanted s.c. in female BALB/c nu/nu mice at 3×106 per mouse. Treatment with Abexinostat (CRA 024781) started when the average tumor volume is -100 mm[1]. Mice bearing human colon tumor xenografts are dosed i.v. with Abexinostat (CRA 024781) using various dosages and schedules to assess the antitumor activity of Abexinostat (CRA 024781) [1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

References
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Abexinostat
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