Droxinostat

• CAT Number: I005751
• CAS Number: 99873-43-5
• Molecular Formula: C₁₁H₁₄ClNO₃
• Molecular Weight: 243.69
• Purity: ≥95%
• Target: HDAC
• Solubility: DMSO ≥46mg/mL Water <1.2mg/mL Ethanol ≥46mg/mL
• Storage: 2-8°C
• IC50: 16.9 μM(HDAC3); 2.47 μM(HDAC6); 1.46 μM(HDAC8)
• IUPAC Name: 4-(4-chloro-2-methylphenoxy)-N-hydroxybutanamide
• InChI: InChI=1S/C11H14ClNO3/c1-8-7-9(12)4-5-10(8)16-6-2-3-11(14)13-15/h4-5,7,15H,2-3,6H2,1H3,(H,13,14)
• InChIKey: JHSXDAWGLCZYSM-UHFFFAOYSA-N
• SMILES: CC1=C(C=CC(=C1)Cl)OCCCC(=O)NO

Droxinostat (Cat No.:I005751) is a selective inhibitor of histone deacetylases (HDACs), specifically targeting HDAC3, HDAC6, and HDAC8. It exhibits IC50 values of 16.9 μM, 2.47 μM, and 1.46 μM for HDAC3, HDAC6, and HDAC8, respectively. Droxinostat demonstrates over 8-fold selectivity against HDAC3 and does not inhibit HDAC1, HDAC2, HDAC4, HDAC5, HDAC7, HDAC9, and HDAC10. By inhibiting specific HDAC isoforms, Droxinostat has the potential to modulate gene expression, alter cellular processes, and impact various biological pathways. This selective inhibition profile makes it a promising candidate for targeted therapeutic interventions in diseases involving aberrant HDAC activity.

Reference

1:Transl Oncol. 2016 Feb;9(1):70-8. doi: 10.1016/j.tranon.2016.01.004. Droxinostat, a Histone Deacetylase Inhibitor, Induces Apoptosis in Hepatocellular Carcinoma Cell Lines via Activation of the Mitochondrial Pathway and Downregulation of FLIP.Liu J,Li G,Wang X,Wang L,Zhao R,Wang J,Kong Y,Ding J,Li J,Zhang L, PMID: 26947884 PMCID: PMC4800063 DOI: 10.1016/j.tranon.2016.01.004 Abstract: BACKGROUND: The current chemotherapeutic outcomes for hepatocellular carcinoma (HCC) are not encouraging, and long-term survival of this patient group remains poor. Recent studies have demonstrated the utility of histone deacetylase inhibitors that can disrupt cell proliferation and survival in HCC management. However, the effects of droxinostat, a type of histone deacetylase inhibitor, on HCC remain to be established.METHODS: The effects of droxinostat on HCC cell lines SMMC-7721 and HepG2 were investigated. Histone acetylation and apoptosis-modulating proteins were assessed via Western blot. Proliferation was examined with 3-(4, 5 dimetyl-2-thiazolyl)-2, 5-diphenyl 2H-tetrazolium bromide, cell proliferation, and real-time cell viability assays, and apoptosis with flow cytometry.RESULTS: Droxinostat inhibited proliferation and colony formation of the HCC cell lines examined. Hepatoma cell death was induced through activation of the mitochondrial apoptotic pathway and downregulation of FLIP expression. Droxinostat suppressed histone deacetylase (HDAC) 3 expression and promoted acetylation of histones H3 and H4. Knockdown of HDAC3 induced hepatoma cell apoptosis and histone H3 and H4 acetylation.CONCLUSIONS: Droxinostat suppresses HDAC3 expression and induces histone acetylation and HCC cell death through activation of the mitochondrial apoptotic pathway and downregulation of FLIP, supporting its potential application in the treatment of HCC.Copyright © 2016 The Authors. Published by Elsevier Inc. All rights reserved.